阅读说明：本技术 半导体工艺腔室、半导体工艺设备和半导体工艺方法 (Semiconductor processing chamber, semiconductor processing equipment and semiconductor processing method ) 是由 王勇飞 佘清 兰云峰 于 2021-08-31 设计创作，主要内容包括：本发明提供一种半导体工艺腔室,包括反应腔和位于反应腔下方的传输腔,反应腔通过底部开口与传输腔连通,半导体工艺腔室中设置有可在反应腔与传输腔之间升降的基座,还设置有密封环和第一弹性密封筒,二者均设置于基座的下方且套设在基座的升降轴上,第一弹性密封筒的顶端在密封环的内孔处与密封环的底壁密封连接,底端在传输腔底部供升降轴穿出的通孔处与传输腔的底壁密封连接,第一弹性密封筒能够在基座上升至反应腔时,通过弹力驱动密封环上升并封闭反应腔的底部开口。本发明能够改善反应腔的控压效果,提高半导体工艺的工艺效果,并缩短传片时间,提高半导体工艺的成膜效率。本发明还提供一种半导体工艺设备和一种半导体工艺方法。(The invention provides a semiconductor process cavity, which comprises a reaction cavity and a transmission cavity positioned below the reaction cavity, wherein the reaction cavity is communicated with the transmission cavity through a bottom opening, a base capable of lifting between the reaction cavity and the transmission cavity is arranged in the semiconductor process cavity, a sealing ring and a first elastic sealing cylinder are also arranged, the sealing ring and the first elastic sealing cylinder are both arranged below the base and are sleeved on a lifting shaft of the base, the top end of the first elastic sealing cylinder is hermetically connected with the bottom wall of the sealing ring at an inner hole of the sealing ring, the bottom end of the first elastic sealing cylinder is hermetically connected with the bottom wall of the transmission cavity at a through hole at the bottom of the transmission cavity, through which the lifting shaft penetrates out, and the first elastic sealing cylinder can drive the sealing ring to lift and close the bottom opening of the reaction cavity through elasticity when the base rises to the reaction cavity. The invention can improve the pressure control effect of the reaction cavity, improve the process effect of the semiconductor process, shorten the wafer conveying time and improve the film forming efficiency of the semiconductor process. The invention also provides semiconductor processing equipment and a semiconductor processing method.)

1. A semiconductor process chamber comprises a reaction chamber and a transmission chamber located below the reaction chamber, wherein the reaction chamber is communicated with the transmission chamber through a bottom opening, a base capable of lifting between the reaction chamber and the transmission chamber through the bottom opening is arranged in the semiconductor process chamber, the semiconductor process chamber is characterized in that a sealing ring and a first elastic sealing cylinder are further arranged in the semiconductor process chamber, the sealing ring and the first elastic sealing cylinder are both arranged below the base and sleeved on a lifting shaft of the base, the top end of the first elastic sealing cylinder is arranged at an inner hole of the sealing ring and hermetically connected with the bottom wall of the sealing ring, the bottom end of the first elastic sealing cylinder is arranged at a through hole which the lifting shaft penetrates out of the bottom of the transmission chamber and hermetically connected with the bottom wall of the transmission chamber, and the first elastic sealing cylinder can lift the base to the reaction chamber, and driving the sealing ring to ascend through elasticity and closing the bottom opening of the reaction cavity.

2. The semiconductor process chamber of claim 1, wherein the first resilient sealing cylinder is a bellows.

3. The semiconductor processing chamber of claim 1, wherein the bottom end of the first resilient sealing cylinder has a coupling flange, and wherein a first annular receiving groove is formed in the bottom wall of the transfer chamber around the through-hole, the coupling flange of the bottom end of the first resilient sealing cylinder being sealingly disposed in the first annular receiving groove.

4. The semiconductor processing chamber of claim 1, wherein the susceptor has a plurality of susceptor holes distributed around the susceptor axis, a plurality of support posts disposed in a one-to-one correspondence in the plurality of susceptor holes for descending along the susceptor holes relative to the susceptor when the susceptor is raised and ascending with the susceptor after a top surface of the support posts are level with a carrying surface of the susceptor, and for supporting and lifting a wafer on the susceptor after the susceptor is lowered to a position where bottom ends of the support posts contact a bottom wall of the transfer chamber; the first elastic sealing cylinder surrounds the outer sides of the supporting columns.

5. The semiconductor processing chamber of any one of claims 1 to 4, wherein the sealing ring comprises a recessed disk and a recessed disk flange, the recessed disk flange is disposed around the recessed disk and fixedly connected with an outer edge of the recessed disk, the recessed disk flange is configured to contact with a bottom of the reaction chamber, and a side of the recessed disk facing the susceptor has a receiving groove configured to receive the susceptor when the susceptor is lowered into the reaction chamber.

6. The semiconductor processing chamber of claim 5, wherein the bottom of the reaction chamber has a second annular receiving groove surrounding the bottom opening for receiving the recessed disk flange.

7. The semiconductor processing chamber of any one of claims 1 to 4, comprising a plurality of the reaction chambers, each of the reaction chambers being in communication with the transfer chamber through the bottom opening, the transfer chamber having a transfer robot disposed therein for transferring wafers between the susceptors corresponding to different ones of the reaction chambers.

8. The semiconductor processing chamber of claim 7, wherein a plurality of susceptors corresponding to a plurality of reaction chambers are disposed around the transfer robot, the transfer robot comprises a driving assembly, an upper flange, and transfer fingers fixedly disposed on the upper flange, and the driving assembly is configured to drive the upper flange and the transfer fingers fixedly disposed thereon to perform a lifting motion and a rotating motion, such that the transfer fingers can remove a portion of the wafers from the susceptors and place the wafers on the other susceptors.

9. A semiconductor processing apparatus comprising the semiconductor processing chamber of any one of claims 1 to 8.

10. A semiconductor processing method applied to the semiconductor processing apparatus of claim 9, the method comprising:

placing a pre-process wafer on the base;

controlling the pedestal to ascend to the reaction cavity so as to make the sealing ring ascend and close the bottom opening of the reaction cavity;

carrying out a semiconductor process;

controlling the base to descend to the transmission cavity;

and taking down the processed wafer on the base.

11. The semiconductor processing method of claim 10, wherein the semiconductor processing chamber comprises a plurality of reaction chambers, and a transfer robot is disposed in the transfer chamber for transferring wafers between the susceptors corresponding to different reaction chambers;

the placing of the pre-process wafer onto the base includes:

placing a pre-process wafer on a part of the base;

controlling the transmission mechanical arm to transfer the wafers before the process on the partial base to other bases;

placing the wafer before the process on the partial base again;

the taking down of the processed wafer on the base comprises the following steps:

taking down the processed wafer on the partial base;

controlling the transmission manipulator to transfer the processed wafers on the other bases to the partial bases;

and taking down the processed wafer on the part of the base again.

12. The semiconductor processing method according to claim 11, wherein a plurality of the susceptors corresponding to a plurality of the reaction chambers are disposed around the transfer robot, and the transfer robot comprises a driving assembly, an upper end flange, and a transfer finger fixedly disposed on the upper end flange;

the controlling the transfer robot to transfer the pre-process wafers on the partial susceptor to other susceptors includes:

controlling the driving assembly to drive the upper end flange to lift, so that the height of the transmission finger is lifted to a position between the wafer before the process and the bearing surface of the base;

controlling the driving assembly to drive the upper end flange to rotate, so that at least part of the transmission fingers rotate to the position below the pre-process wafer on the partial base, and controlling the driving assembly to drive the upper end flange to lift, so that the transmission fingers take down the pre-process wafer on the partial base;

controlling the driving assembly to drive the upper end flange to rotate, enabling the wafer before the process borne by the transmission finger to rotate to be located above other bases, and controlling the driving assembly to drive the upper end flange to descend, so that the transmission finger can place the wafer before the process on other bases;

controlling the driving assembly to drive the upper end flange to rotate, so that the transmission finger leaves the base;

the controlling the transfer robot to transfer the processed wafers on the other susceptors to the partial susceptors includes:

controlling the driving assembly to drive the upper end flange to lift, so that the height of the transmission finger is lifted to a position between the wafer before the process and the bearing surface of the base;

controlling the driving assembly to drive the upper end flange to rotate, so that at least part of the transmission fingers rotate to the position below the upper pre-process wafer, and controlling the driving assembly to drive the upper end flange to lift, so that the transmission fingers take down other pre-process wafers on the base;

controlling the driving assembly to drive the upper end flange to rotate, enabling a pre-process wafer carried on the transmission finger to rotate to be located above the partial base, and controlling the driving assembly to drive the upper end flange to descend, enabling the transmission finger to place the pre-process wafer on the partial base;

and controlling the driving assembly to drive the upper end flange to rotate so that the transmission finger leaves the base.

Technical Field

The invention relates to the field of semiconductor process equipment, in particular to a semiconductor process chamber, semiconductor process equipment comprising the semiconductor process chamber and a semiconductor process method applied to the semiconductor process equipment.

Background

With the popularization and updating of electronic products and the promotion of international situation, the semiconductor industry is rapidly developing, wherein the development of very large scale integrated circuits is particularly prominent. Each generation of factory urgently needs an optimal production expansion scheme, namely maximizing the ratio of the capacity to the occupied area. The current solutions for increasing productivity are mainly the following two: firstly, the film forming rate is improved, namely the number of film forming substrates in unit time is improved; and secondly, increasing the number of substrates which are formed simultaneously.

However, increasing throughput using existing single wafer processing chambers can increase film formation rates, but increasing film formation rates has limited throughput. Compared with the prior art, the high-capacity multi-reaction-zone chamber equipment has obvious advantages and is bound to become the primary consideration equipment of each generation of factories. Under the promotion, each equipment manufacturer develops and develops high-capacity equipment in a dispute in order to compete for the high-capacity multi-reaction-zone chamber equipment market. The key technology of the high-capacity multi-reaction-zone chamber equipment is the independence of each reaction zone, namely an isolation sealing structure, and taking CVD/ALD process equipment as an example, the isolation sealing structure can ensure the stability and the uniformity of an airflow field and further ensure the stability and the uniformity of film formation. However, the sheet conveying structure of the high-capacity multi-reaction-zone chamber equipment leads to mutual communication among all the reaction zones, the space of the conveying cavity is large, the flow channel of the inner space is irregular, and the stability and uniformity of airflow cannot be guaranteed. Further causing unstable pressure control in the process and finally influencing the film forming quality.

Therefore, how to provide a semiconductor processing device with higher reaction region tightness and better pressure control effect becomes a technical problem to be solved in the field.

Disclosure of Invention

The invention aims to provide a semiconductor process chamber, semiconductor process equipment and a semiconductor process method, wherein the semiconductor process chamber can improve the pressure control effect of a reaction cavity, improve the process effect of a semiconductor process, shorten the wafer conveying time and improve the film forming efficiency of the semiconductor process.

In order to achieve the above object, as an aspect of the present invention, a semiconductor process chamber is provided, which includes a reaction chamber and a transmission chamber located below the reaction chamber, the reaction chamber is communicated with the transmission chamber through a bottom opening, a base is disposed in the semiconductor process chamber and can be lifted between the reaction chamber and the transmission chamber through the bottom opening, a sealing ring and a first elastic sealing cylinder are further disposed in the semiconductor process chamber, the sealing ring and the first elastic sealing cylinder are both disposed below the base and are sleeved on a lifting shaft of the base, a top end of the first elastic sealing cylinder is hermetically connected to a bottom wall of the sealing ring at an inner hole of the sealing ring, a bottom end of the first elastic sealing cylinder is hermetically connected to a bottom wall of the transmission chamber at a through hole at the bottom of the transmission chamber through which the lifting shaft passes, the first elastic sealing cylinder can drive the sealing ring to ascend through elasticity and seal the bottom opening of the reaction cavity when the base ascends to the reaction cavity.

Optionally, the first resilient sealing cartridge is a bellows.

Optionally, a connecting flange is arranged at the bottom end of the first elastic sealing cylinder, a first annular accommodating groove is formed on the bottom wall of the transmission cavity around the through hole, and the connecting flange at the bottom end of the first elastic sealing cylinder is arranged in the first annular accommodating groove in a sealing mode.

Optionally, the susceptor has a plurality of susceptor holes distributed around the susceptor axis, a plurality of supporting columns are correspondingly arranged in the plurality of susceptor holes, and the supporting columns are used for descending along the susceptor holes relative to the susceptor when the susceptor ascends, ascending along with the susceptor after the top surfaces of the supporting columns are leveled with the carrying surface of the susceptor, and supporting and lifting the wafer on the susceptor after the susceptor descends to the bottom ends of the supporting columns and contacts with the bottom wall of the transfer chamber; the first elastic sealing cylinder surrounds the outer sides of the supporting columns.

Optionally, the sealing ring includes concave dish and concave dish flange, the concave dish flange encircle the concave dish setting and with the outer edge fixed connection of concave dish, the concave dish flange be used for with the bottom contact of reaction chamber, one side of concave dish towards the base has the recess of holding, is used for when the base descends to hold when reaching the reaction chamber the base.

Optionally, the bottom of the reaction chamber has a second annular receiving groove surrounding the bottom opening for receiving the recessed disk flange.

Optionally, the semiconductor process chamber includes a plurality of reaction chambers, each of the reaction chambers is communicated with the transfer chamber through the bottom opening, and a transfer robot is disposed in the transfer chamber and is configured to transfer wafers between the bases corresponding to different reaction chambers.

Optionally, a plurality of the bases corresponding to the plurality of reaction chambers are arranged around the transmission manipulator, the transmission manipulator includes a driving assembly, an upper end flange and a transmission finger fixedly arranged on the upper end flange, the driving assembly is used for driving the upper end flange and the transmission finger fixed thereon to perform lifting and rotating actions, so that the transmission finger takes off part of the wafers on the bases and places the wafers on other bases.

As a second aspect of the present invention, there is provided a semiconductor processing apparatus comprising any one of the semiconductor processing chambers described above.

As a third aspect of the present invention, there is provided a semiconductor processing method applied to the aforementioned semiconductor processing apparatus, the method comprising:

placing a pre-process wafer on the base;

controlling the pedestal to ascend to the reaction cavity so as to make the sealing ring ascend and close the bottom opening of the reaction cavity;

carrying out a semiconductor process;

controlling the base to descend to the transmission cavity;

and taking down the processed wafer on the base.

Optionally, the semiconductor process chamber includes a plurality of reaction chambers, and a transfer robot is disposed in the transfer chamber and is configured to transfer wafers between the bases corresponding to different reaction chambers;

the placing of the pre-process wafer onto the base includes:

placing a pre-process wafer on a part of the base;

controlling the transmission mechanical arm to transfer the wafers before the process on the partial base to other bases;

placing the wafer before the process on the partial base again;

the taking down of the processed wafer on the base comprises the following steps:

taking down the processed wafer on the partial base;

controlling the transmission manipulator to transfer the processed wafers on the other bases to the partial bases;

and taking down the processed wafer on the part of the base again.

Optionally, a plurality of the bases corresponding to a plurality of the reaction chambers are arranged around the transmission manipulator, and the transmission manipulator includes a driving assembly, an upper end flange and a transmission finger fixedly arranged on the upper end flange;

the controlling the transfer robot to transfer the pre-process wafers on the partial susceptor to other susceptors includes:

controlling the driving assembly to drive the upper end flange to lift, so that the height of the transmission finger is lifted to a position between the wafer before the process and the bearing surface of the base;

controlling the driving assembly to drive the upper end flange to rotate, so that at least part of the transmission fingers rotate to the position below the pre-process wafer on the partial base, and controlling the driving assembly to drive the upper end flange to lift, so that the transmission fingers take down the pre-process wafer on the partial base;

controlling the driving assembly to drive the upper end flange to rotate, enabling the wafer before the process borne by the transmission finger to rotate to be located above other bases, and controlling the driving assembly to drive the upper end flange to descend, so that the transmission finger can place the wafer before the process on other bases;

controlling the driving assembly to drive the upper end flange to rotate, so that the transmission finger leaves the base;

the controlling the transfer robot to transfer the processed wafers on the other susceptors to the partial susceptors includes:

controlling the driving assembly to drive the upper end flange to lift, so that the height of the transmission finger is lifted to a position between the wafer before the process and the bearing surface of the base;

controlling the driving assembly to drive the upper end flange to rotate, so that at least part of the transmission fingers rotate to the position below the upper pre-process wafer, and controlling the driving assembly to drive the upper end flange to lift, so that the transmission fingers take down other pre-process wafers on the base;

controlling the driving assembly to drive the upper end flange to rotate, enabling a pre-process wafer carried on the transmission finger to rotate to be located above the partial base, and controlling the driving assembly to drive the upper end flange to descend, enabling the transmission finger to place the pre-process wafer on the partial base;

and controlling the driving assembly to drive the upper end flange to rotate so that the transmission finger leaves the base.

In the invention, the sealing ring and the first elastic sealing cylinder can isolate the reaction cavity and the inner space of the sealing cylinder from the outer space of the sealing cylinder, thereby improving the sealing effect of the reaction cavity, improving the pressure control effect of the reaction cavity and further improving the process effect of the semiconductor process. In addition, the manipulator and other devices in the outer space of the sealing cylinder are in strict isolation and sealing relation with the reaction cavity, so that the outer space of the sealing cylinder can be vacuumized while the semiconductor process is carried out in the reaction cavity, the transmission cavity does not need to be vacuumized to the background again in the wafer transferring step among the semiconductor processes, the wafer transferring time is shortened, the film forming efficiency of the semiconductor process is improved, and the machine table capacity is improved. In addition, the semiconductor process chamber structure provided by the invention is particularly suitable for a multi-reaction-zone chamber, and the sealing ring and the first elastic sealing cylinder can strictly seal the reaction chamber, so that the problem of mutual interference of air flows among all reaction zones in the multi-reaction-zone chamber can be solved, and the film forming quality of the multi-reaction-zone chamber is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic diagram of a single process chamber of a conventional multiple reaction zone chamber apparatus;

FIG. 2 is a schematic view of another state of the process chamber of FIG. 1;

FIG. 3 is an enlarged schematic view of a portion of the process chamber of FIG. 2;

FIG. 4 is a schematic diagram of a semiconductor processing chamber according to an embodiment of the present invention;

FIG. 5 is another schematic diagram of a semiconductor processing chamber provided in accordance with an embodiment of the present invention;

FIG. 6 is an enlarged partial schematic view of the semiconductor processing chamber of FIG. 5;

FIG. 7 is a schematic diagram illustrating the relative positioning of a transfer robot and the susceptors of a plurality of process chambers in a semiconductor processing apparatus according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a seal ring and a first resilient seal cartridge in a semiconductor processing chamber according to an embodiment of the present invention;

FIG. 9 is a schematic flow chart of a semiconductor processing method according to an embodiment of the present invention;

FIG. 10 is a schematic flow chart diagram illustrating a portion of the steps in a semiconductor processing method according to an embodiment of the present invention;

fig. 11 is a schematic flow chart illustrating a portion of the steps in a semiconductor processing method according to an embodiment of the present invention.

Description of reference numerals:

1: thin film deposition apparatus 2: reaction chamber

3: substrate transfer chamber 4: base seat

5: exhaust pipe device 6: shower head

7: the partition plate 8: corrugated pipe

9: substrate lift pin 10: pores of fine

11: reaction gas inlet 12: lifting device

13: wafer 14: step part

15: reaction zone 16: gap

17: a bottom surface.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

Fig. 1 to 3 are schematic structural views of a single process chamber in a conventional high-throughput multi-reaction-zone chamber apparatus, wherein fig. 1 shows a wafer-handling state in which a susceptor 4 is lowered, and fig. 2 shows a reaction state in which the susceptor 4 is raised to close an opening of a partition 7 and seal a reaction zone (not completely sealed in practice, see below).

As shown in fig. 1 to 2, after the wafer 13 is loaded on the substrate lift pins 9, the susceptor 4 is raised, and at this time, the substrate lift pins 9 (pins) remain at the home position by gravity (there is a gap between the substrate lift pins 9 and the holes in the susceptor 4 that accommodate the substrate lift pins 9). Until the upper tapered surface of the substrate lift pins 9 comes into contact with the susceptor 4, the tapered surface of the substrate lift pins 9 comes into contact with the tapered surface of the upper end of the hole of the susceptor 4. The susceptor 4 continues to rise and the flat surface 14 of the susceptor 4 contacts the lower end surface of the bellows 8, compressing the bellows 8, thereby providing a sealing effect that separates the upper reaction zone from the lower transfer zone.

In practice, however, the upper reaction region and the lower transfer region can be communicated through the gap between the substrate lift pin 9 and the hole, which not only affects the pressure control effect of the reaction region, but also the gas in the reaction region flows through the lower portion of the wafer 13 and flows into the gap between the substrate lift pin 9 and the hole, and further enters the lower transfer region, where it reacts to form particles. When the susceptor 4 is lowered or the wafer is transferred, particles fall on the upper surface of the wafer 13 to cause contamination. During processing, process gases may also enter the space indicated by 22 from the gap 25, where films and particles are formed, and these particles may fall on the upper surface of the wafer 13 and cause contamination during the lowering of the susceptor 4. Moreover, since the base 4 needs to pass through the bellows 8, and the bellows has a bellows width, the bellows width also needs to occupy some lateral space, thereby increasing the floor space of the chamber.

In order to solve the above technical problems, as an aspect of the present invention, there is provided a semiconductor process chamber, as shown in fig. 4, the semiconductor process chamber includes a reaction chamber 100 and a transfer chamber 200 located below the reaction chamber 100, the reaction chamber 100 is communicated with the transfer chamber 200 through a bottom opening, a susceptor 300 is disposed in the semiconductor process chamber and can be lifted and lowered between the reaction chamber 100 and the transfer chamber 200 through the bottom opening of the reaction chamber 100, and a sealing ring 410 and a first elastic sealing cylinder 420 are further disposed. Sealing ring 410 and a resilient seal section of thick bamboo 420 all set up in the below of base 300 and establish on the lift axle 520 of base 300, the top of a resilient seal section of thick bamboo 420 at the hole department of sealing ring 410 with the diapire sealing connection of sealing ring 410, the bottom of a resilient seal section of thick bamboo 420 supplies in transmission chamber 200 bottom through-hole department that lift axle 520 wore out with the diapire sealing connection in transmission chamber, a resilient seal section of thick bamboo 420 can rise and seal the bottom opening of reaction chamber 100 through elasticity drive sealing ring 410 when base 300 rises to reaction chamber 100.

As an alternative embodiment of the present invention, the first elastic sealing cylinder 420 may be a bellows. In the present invention, the first elastic sealing cylinder 420 can elastically drive the sealing ring 410 to ascend, when the height of the susceptor 300 descends, the susceptor 300 presses the sealing ring 410 and causes the first elastic sealing cylinder 420 to be compressed, after a wafer is placed on the susceptor 300 before a process, the height of the susceptor 300 ascends and enters the reaction chamber 100, and the first elastic sealing cylinder 420 jacks up the sealing ring 410 to close the bottom opening of the reaction chamber 100. At this time, the first elastic sealing cylinder 420 divides the transmission chamber 200 into the sealing cylinder inner space 210 and the sealing cylinder outer space 220, and the sealing ring 410 and the first elastic sealing cylinder 420 do not have a hermetic defect (e.g., a gap between the lift pin 9 and a hole in the base 4), so that the sealing cylinder inner space 210 and the sealing cylinder outer space 220 and a robot in the sealing cylinder outer space 220 can be isolated, and further, when a process gas is introduced into the reaction chamber 100 and a semiconductor process is performed, the process gas in the reaction chamber 100 does not leak to the sealing cylinder outer space 220 due to a pressure difference between the reaction chamber 100 and the sealing cylinder outer space 220, thereby improving a pressure control effect of the reaction chamber 100.

In the present invention, the sealing ring 410 and the first elastic sealing cylinder 420 can isolate the reaction chamber 100 and the sealing cylinder inner space 210 from the sealing cylinder outer space 220, thereby improving the sealing effect of the reaction chamber 100, improving the pressure control effect of the reaction chamber 100, and further improving the process effect of the semiconductor process.

In addition, in order to ensure the surface cleanliness of the wafer, the transmission cavity 200 needs to be vacuumized before wafer transfer every time, and in the invention, the devices such as a mechanical arm and the like in the outer space 220 of the sealing cylinder are in a strict isolation sealing relation with the reaction cavity 100, so that the outer space 220 of the sealing cylinder can be vacuumized while a semiconductor process is carried out in the reaction cavity 100, the transmission cavity 200 does not need to be vacuumized to the background again in the wafer transfer step among the semiconductor processes, the wafer transfer time is shortened, the film forming efficiency of the semiconductor process is improved, and the machine productivity is improved.

In addition, the semiconductor process chamber structure provided by the invention is particularly suitable for a multi-reaction-zone chamber (that is, a plurality of reaction chambers 100 exist in the same semiconductor process chamber, and the plurality of reaction chambers 100 are communicated with the same transmission chamber 200 below), as shown in fig. 5, the sealing ring 410 and the first elastic sealing cylinder 420 can strictly seal the reaction chambers 100, so that the problem of mutual interference of air flows among the reaction zones (reaction chambers) in the multi-reaction-zone chamber can be solved, and the film forming quality of the multi-reaction-zone chamber can be improved.

The reaction type of the semiconductor process performed in the semiconductor process chamber is not particularly limited in the embodiments of the present invention, and for example, the semiconductor process chamber may be a CVD (Chemical Vapor Deposition) process chamber, or an ALD (Atomic Layer Deposition) process chamber.

As a preferred embodiment of the present invention, as shown in fig. 4, the outer diameter of the first elastic sealing cylinder 420 is smaller than the outer diameter of the susceptor 300, so that the size of the chamber is not increased, the floor space of each process chamber is reduced, and the utilization rate of the machine space is improved.

In order to improve the connection strength between the two ends of the first elastic sealing cylinder 420 and the sealing ring 410 and the bottom wall of the transmission chamber 200 and the convenience of assembly and disassembly, as a preferred embodiment of the present invention, as shown in fig. 4, a connecting flange 421 is provided at the bottom end of the first elastic sealing cylinder 420, a first annular receiving groove is formed around the through hole on the bottom wall of the transmission chamber 200, and the connecting flange 421 at the bottom end of the first elastic sealing cylinder 420 is sealingly disposed in the first annular receiving groove.

In order to improve the air tightness, the two ends of the first elastic sealing cylinder 420 are provided with the connecting flanges 421, and the first elastic sealing cylinder 420 is preferably connected with the connecting flanges 421 at the two ends by welding. And, be formed with the first annular holding tank that holds first resilient seal section of thick bamboo 420 bottom flange 421 on the diapire of transmission chamber 200, improved the location accuracy nature of first resilient seal section of thick bamboo 420 horizontal position.

The embodiment of the present invention is not limited to other structures on the susceptor 300, for example, the susceptor 300 may include a supporting column for lifting a wafer. Specifically, as shown in fig. 4, the susceptor 300 has a plurality of susceptor holes (3 or more) distributed around the axis of the susceptor 300, a plurality of support pillars 310 are disposed in the plurality of susceptor holes in a one-to-one correspondence, and the support pillars 310 are configured to descend along the susceptor holes relative to the susceptor 300 when the susceptor 300 ascends, ascend along with the susceptor 300 after the top surfaces of the support pillars 310 are flush with the carrying surface of the susceptor 300, and support and lift the wafer on the susceptor 300 after the susceptor 300 descends until the bottom ends of the support pillars 310 contact the bottom wall of the transfer chamber 200.

In the present embodiment, the top of the supporting column 310 has an inverted conical section (diameter gradually decreases from the top to the bottom), and the top of the base hole also has an inverted conical surface matching with it. When the susceptor 300 is in a low position, the bottom end of the supporting column 310 abuts against the bottom surface of the transfer chamber 200, and the upper end surface of the supporting column 310 is higher than the upper end surface of the susceptor, thereby leaving a space for transferring the wafer. The susceptor 300 rises, and before the inverted cone section of the upper end of the support pillar 310 contacts the inverted cone surface of the susceptor hole, the support pillar 310 does not rise under the action of gravity. After the inverted cone section at the upper end of the supporting column 310 contacts the inverted cone of the base hole, the supporting force of the inverted cone counteracts the gravity borne by the supporting column 310, and the supporting column 310 ascends to the process position along with the base 300.

In order to avoid the air leakage problem caused by the gap between the supporting column 310 and the base hole, a strict sealing is realized, as shown in fig. 4, the first elastic sealing cylinder 420 surrounds the outer sides of the supporting columns 310, that is, the inner diameter of the first elastic sealing cylinder 109 is larger than the reference circle of the base holes uniformly distributed in the circumferential direction of the base.

In order to improve the stability of the relative position between the susceptor 300 and the sealing ring 410 when the susceptor 300 is pressed down, as shown in fig. 8, as a preferred embodiment of the present invention, the sealing ring 410 comprises a concave disk 411 and a concave disk flange 412, the concave disk flange 412 is disposed around the concave disk 411 and fixedly connected to the outer edge of the concave disk 411 for contacting with the bottom of the reaction chamber 100, and the side of the concave disk 411 facing the susceptor 300 has a receiving groove for receiving the susceptor 300 when the susceptor 300 is lowered to the reaction chamber 100. The receiving groove of the sealing ring 410 is centrally formed with an inner hole of the sealing ring 410.

In the embodiment of the present invention, the surface of the sealing ring 410 has an accommodating groove corresponding to the position and size of the base 300 (the projection on the horizontal plane), when the base 300 descends, the base falls into the accommodating groove first, and then the bottom surface of the accommodating groove is pressed downward, so that the sealing ring 410 and the first elastic sealing cylinder 420 are both pressed downward; similarly, before the susceptor 300 rises to enter the reaction chamber 100, the sealing ring 410 is in contact with the susceptor 300 under the lifting force of the first elastic sealing cylinder 420 and keeps the susceptor 300 in the accommodating groove, so that the stability of the relative position between the sealing ring 410 and the susceptor 300 is kept through the side wall of the accommodating groove, and the stability of wafer transmission is further improved. Meanwhile, when the sealing ring 410 rises to contact with the bottom of the reaction chamber 100, the relative position between the sealing ring 410 and the bottom opening of the reaction chamber 100 is ensured, and the sealing effect of the sealing ring 410 and the first elastic sealing cylinder 420 on the reaction chamber 100 is further ensured.

In order to prevent the coupling flange 421 from affecting the structure on the top functional layer of the susceptor 300, as a preferred embodiment of the present invention, the depth of the receiving groove of the sealing ring 410 is smaller than the thickness of the heating plate at the bottom of the susceptor 300.

To further ensure the sealing effect of the reaction chamber 100, as a preferred embodiment of the present invention, as shown in fig. 4 and 5, the bottom of the reaction chamber 100 (on the top wall of the transfer chamber 200) has a second annular receiving groove 130 surrounding the bottom opening of the reaction chamber 100, and the second annular receiving groove 130 is used for receiving the concave flange 412.

In the embodiment of the present invention, the second annular receiving groove 130 is formed at the bottom of the reaction chamber 100, and after the sealing ring 410 rises, the concave flange 412 vertically enters the second annular receiving groove 130, so that the degree of freedom in the horizontal direction of the sealing ring 410 is further limited by the matching relationship between the concave flange 412 and the second annular receiving groove 130, so that the sealing ring 410 can only move relative to the reaction chamber 100 in the up-down direction, and the sealing effect of the sealing ring 410 and the first elastic sealing cylinder 420 on the reaction chamber 100 is further ensured.

It should be noted that the distance between the bottom surface of the transmission chamber 200 and the bottom surface of the second annular receiving groove 130 is smaller than the free length of the first elastic sealing cylinder 109, i.e. the first elastic sealing cylinder 109 is always in a compressed state to ensure the sealing effect.

In order to further improve the sealing effect of the sealing ring 410 and the first elastic sealing cylinder 420 on the reaction chamber 100, as shown in fig. 4, 6 and 8, as a preferred embodiment of the present invention, a convex structure 413 extending circumferentially around the concave disc 411 is formed on the top surface of the concave disc flange 412, and a concave structure corresponding in position and shape (projection on a horizontal plane) is formed on the bottom surface of the second annular receiving groove 130, so that the width of the gap between the concave disc flange 412 and the second annular receiving groove 130 is increased, and the airtightness of the bottom opening of the reaction chamber 100 sealed by the concave disc flange 412 is further improved.

The outer shapes of the concave disk flange 412 and the second annular receiving groove 130 and the pattern shape of the protrusion structure 413 are not limited in the embodiments of the present invention, for example, the outer shapes of the concave disk flange 412 and the second annular receiving groove 130 and the pattern shape of the protrusion structure 413 may be a triangle (or an approximate triangle), a square (or an approximate square), or a regular polygon (or an approximate regular polygon) with more sides. Preferably, the outer contour shapes of the concave disk flange 412 and the second annular receiving groove 130 and the pattern shape of the convex structure 413 are both circular, so that the stress uniformity between the concave disk flange 412 and the second annular receiving groove 130 can be improved, and the concave disk flange 412 and the second annular receiving groove 130 do not need to be aligned at an angle, thereby simplifying the equipment structure and improving the equipment assembly efficiency.

The embodiment of the present invention does not specifically limit how the susceptor 300 is driven to ascend and descend, for example, as an alternative embodiment of the present invention, as shown in fig. 4, a lift driving assembly 510 is disposed at the bottom of the semiconductor process chamber, and the lift driving assembly 510 drives the susceptor 300 to ascend and descend through a lift shaft 520. Alternatively, as shown in fig. 4, the lifting driving assembly 510 may include a rail-slider device, the rail extends vertically and is fixed at the bottom of the process chamber, the slider is movably disposed on the rail and is fixedly connected to the bottom end of the lifting shaft 520, and the slider reciprocates vertically on the rail to drive the lifting shaft 520 and the base 300 connected to the top end of the lifting shaft 520 to move up and down.

In order to further improve the process effect of the semiconductor process in the reaction chamber 100 and maintain the cleanliness of the structure below the susceptor 300, as a preferred embodiment of the present invention, the semiconductor process chamber further comprises a purging device (not shown), as shown in fig. 4, for introducing a purging gas a into the first elastic sealing cylinder 420 through the through hole 250 at the bottom of the transfer chamber 200.

In the embodiment of the invention, the purging device can introduce the purging gas a into the first elastic sealing cylinder 420 through the through hole 250 at the bottom of the transmission cavity 200 in the semiconductor process, so that the pressure of the gas in the lower space of the base 300 can be ensured to be higher than the pressure of the process gas in the reaction zone, the process gas is prevented from entering the lower space of the base 300 and forming films and particles (no dead zone exists in the space between the first elastic sealing cylinder 420, the sealing ring 410 and the base 300, and the gas flow is smooth from bottom to top), and the cleanliness of the surface of the structure below the base 300 is ensured. And the process gas does not enter the space under the susceptor 300 filled with the purge gas a, thereby reducing the region to be filled with the process gas, i.e., reducing the volume of the reaction region, increasing the concentration of the process gas after the same amount of process gas enters the reaction region, and further increasing the film forming rate of the semiconductor process.

In order to further improve the air tightness of the lower space of the susceptor 300, as a preferred embodiment of the present invention, as shown in fig. 4, the semiconductor process chamber further includes a second elastic sealing cylinder 530, a top end of the second elastic sealing cylinder 530 is hermetically connected to the through hole 250 at the bottom of the transfer chamber 200, a bottom end of the second elastic sealing cylinder 530 is hermetically connected to a bottom end of the elevating shaft 520, and a purging device is connected to a bottom end of the second elastic sealing cylinder 530 and introduces a purging gas a into the through hole 250 at the bottom of the transfer chamber 200 through the second elastic sealing cylinder 530.

As an alternative embodiment of the present invention, as shown in fig. 4 and 6, an exhaust passage 110 is provided at the outer side of the reaction chamber 100, an exhaust hole is formed on the sidewall of the reaction chamber 100, the reaction chamber 100 is communicated with the exhaust passage 110 through the exhaust hole, and the height of the exhaust hole is higher than the process position of the susceptor 300.

In the embodiment of the present invention, an exhaust passage 110 is disposed outside the reaction chamber 100, and the exhaust passage 110 is communicated with the reaction chamber 100 through an exhaust hole and is connected to an external vacuum pump through a first vacuum port 120, so as to draw reaction exhaust gas from the reaction chamber 100 and purge gas a entering the reaction region (gas flow direction is shown by arrow in fig. 4).

In order to improve the uniformity of the exhaust from the reaction chamber 100 to the exhaust passage 110 through the exhaust holes and further improve the uniformity of the semiconductor process, as a preferred embodiment of the present invention, the exhaust passage 110 is disposed around the reaction chamber 100 along a horizontal direction, a plurality of exhaust holes are formed on a sidewall of the reaction chamber 100, and the plurality of exhaust holes are uniformly distributed in a circumferential direction.

As an alternative embodiment of the present invention, as shown in fig. 4 and 6, a second vacuum port 230 is further formed on the bottom wall of the transfer chamber 200, and the transfer chamber 200 is connected to an external vacuum pump through the second vacuum port 230, so that the outer space 220 of the sealing cylinder can be evacuated when the semiconductor process is performed in the reaction chamber 100.

As a preferred embodiment of the present invention, as shown in fig. 5 and 7, the semiconductor process chamber includes a plurality of reaction chambers 100, each reaction chamber 100 is communicated with a transfer chamber 200 through a bottom opening, and a transfer robot 600 is disposed in the transfer chamber 200 for transferring wafers between susceptors 300 corresponding to different reaction chambers 100.

In the embodiment of the present invention, each reaction chamber 100 can be strictly sealed by the sealing ring 410 and the first elastic sealing cylinder 420, so that the problem of mutual interference of air flows between different reaction chambers 100 can be solved, and the film forming quality in each reaction chamber 100 can be improved (proved by experiments of the inventor, the transmission chamber 200 is vacuumized and the pressure in the transmission chamber 200 is detected, and the pressure rise value of the gas pressure in the transmission chamber 200 is very small (less than 5mtorr/min), that is, the sealing effect between the transmission chamber 200 and the reaction chambers 100 is effectively improved).

In the embodiment of the present invention, the transfer robot 600 can transfer the wafer between the bases 300 of different process chambers, so that the external robot can only place the wafer on a part of the bases 300 in the transfer chamber 200 from the transfer port 240 of the transfer chamber 200 or take the wafer off from the part of the bases 300 (perform a wafer pick-and-place operation), thereby simplifying the positioning and transferring actions of the bases 300 at different positions after the external robot extends into the transfer chamber 200, and improving the stability of the wafer position.

Specifically, a robot through hole is formed in the bottom wall of the transfer chamber 200 (the plurality of reaction chambers 100 share one transfer chamber 200), the transfer robot 600 includes a driving assembly and an upper end flange 62, and the top end of the output shaft of the driving assembly passes through the robot through hole and is fixedly connected with the upper end flange 62. The plurality of susceptors 300 corresponding to the plurality of reaction chambers 100 are disposed around the transfer robot 600, the upper flange 62 is fixedly provided with transfer fingers 61 (including a first transfer finger 611, a second transfer finger 612, a third transfer finger 613, and a fourth transfer finger 614), and the driving assembly is configured to drive the upper flange 62 and the transfer fingers 61 fixed thereon to perform a lifting motion and a rotating motion (around an output shaft axis), so that the transfer fingers 61 take off a part of the wafers on the susceptors 300 and place the wafers on other susceptors 300. As a preferred embodiment of the present invention, as shown in fig. 7, the semiconductor process chamber includes four susceptors 300 (including a first susceptor 71, a second susceptor 72, a third susceptor 73, and a fourth susceptor 74) corresponding to four reaction chambers 100, which are disposed at equal intervals around the circumference of a transfer robot 600.

As an alternative embodiment of the present invention, the external robot performs the wafer picking and placing operation only on two susceptors 300 (e.g., the first susceptor 71 and the fourth susceptor 74), and the transfer robot 600 transfers the wafer onto the other two susceptors 300 (e.g., the second susceptor 74 and the third susceptor 73).

To facilitate understanding by those skilled in the art, a specific embodiment of a semiconductor process using a semiconductor process chamber provided by embodiments of the present invention is provided as follows:

before the semiconductor process starts, the four susceptors 300 are all in the low position.

The wafer 700 is transferred from the outside of the process chamber to the upper side of the first pedestal 71 and the second pedestal 74 through the transfer port 240, and falls down to the upper end surfaces of the plurality of support pillars 310 corresponding to the first pedestal 71 and the second pedestal 74, respectively. The upper end flange 62 is driven by the driving assembly of the transfer robot 600 to rise to a predetermined height and rotate clockwise until the first finger 611 and the second finger 612 rotate below the wafer 700 carried by the fourth susceptor 74 and the first susceptor 71, respectively.

The upper flange 62 is again raised by the driving assembly of the transfer robot 600 so that the first finger 611 and the second finger 612 respectively lift the wafer 700 on the first susceptor 71 and the second susceptor 74.

Subsequently, the upper end flange 62 is driven to rotate clockwise by 180 °, so that the first finger 611 and the second finger 612 rotate to be located above the second base 72 and the third base 73, respectively. The upper flange 62 is driven down so that the first finger 611 and the second finger 612 respectively place the wafer 700 on the upper end surfaces of the support columns 310 of the second base 72 and the third base 73.

The transfer robot 600 rotates counterclockwise by a certain angle and is hidden in the space between the susceptors 300.

The two wafers 700 are transferred to the upper portions of the first pedestal 71 and the second pedestal 74 again, and the first pedestal 71, the second pedestal 72, the third pedestal 73 and the fourth pedestal 74 are driven by the respective lifting driving assemblies 510 to ascend. The first elastic sealing cylinder 109 is stretched by its own elastic force to lift the sealing ring 410 until the concave flange 412 of the sealing ring 410 enters the second annular receiving groove 130 of the reaction chamber 100.

The susceptor 300 is further raised to the process station, disengaged from the seal ring 410, and the susceptor 300 continues to be raised to the desired process station. When a semiconductor process is performed in the reaction chamber 100, the purge component blows a purge gas a from the through hole 250 at the bottom of the transfer chamber 200, the transfer chamber 200 exhausts gas through the second vacuum port 230, the vacuum pump extracts gas in the reaction region through the first vacuum port 120, it is ensured that the pressure below the susceptor 300 is greater than the pressure above the susceptor 300, and the process gas does not enter the transfer chamber during the process, thereby eliminating particle sources.

After the process is completed, the lift drive assembly 510 drives the pedestal 300 down to the lowered position, and the wafer 700 is lifted up by the support posts 310 and off the top surface of the pedestal 300 in preparation for removal of the wafer.

The wafer 700 on the first pedestal 71 and the fourth pedestal 74 is removed and transferred out of the process chamber through the transfer port 240.

Then the driving assembly drives the upper end flange 62 to rotate clockwise until the two fingers 61 rotate to the position below the wafer 700 above the second base 72 and the third base 73, and the driving assembly drives the upper end flange 62 to drive the two fingers 61 to ascend and respectively support the wafer 700 above the second base 72 and the third base 73. Then, the wafer 700 is rotated clockwise by 180 degrees and then lowered, two wafers 700 are respectively placed on the first base 71 and the fourth base 74, and the wafers 700 on the first base 71 and the fourth base 74 are removed again and are transferred out of the process chamber through the transfer port 240.

The above steps are performed in a cycle, so that the wafers are processed in groups (four wafers are in a group in the case that the semiconductor process chamber includes four reaction chambers 100), and efficient production is realized.

As a second aspect of the present invention, there is provided a semiconductor processing apparatus comprising the semiconductor processing chamber described above. By using the semiconductor process chamber, the semiconductor process apparatus provided in this embodiment can obtain various advantages of the semiconductor process chamber, which are not described herein again.

As a third aspect of the present invention, there is provided a semiconductor processing method applied to a semiconductor processing chamber provided in an embodiment of the present invention, as shown in fig. 9, the method including:

step S1, placing the pre-process wafer 700 on the susceptor 300;

step S2, controlling the susceptor 300 to ascend to the reaction chamber 100, so as to ascend the sealing ring and close the bottom opening of the reaction chamber 100;

step S3, carrying out a semiconductor process;

step S4, controlling the susceptor 300 to descend to the transfer chamber 200;

step S5, the processed wafer 700 on the susceptor 300 is removed.

In the present invention, the sealing ring 410 and the first elastic sealing cylinder 420 can isolate the reaction chamber 100 and the sealing cylinder inner space 210 from the sealing cylinder outer space 220, thereby improving the sealing effect of the reaction chamber 100, improving the pressure control effect of the reaction chamber 100, and further improving the process effect of the semiconductor process. In addition, in order to ensure the surface cleanliness of the wafer 700, the vacuum pumping needs to be performed before the wafer transfer of the transfer chamber 200 each time, but in the invention, the strict isolation and sealing relationship is adopted between the devices such as the mechanical arm and the like in the outer space 220 of the sealing cylinder and the reaction chamber 100, so that the outer space 220 of the sealing cylinder can be subjected to vacuum pumping while the semiconductor process is performed in the reaction chamber 100, the transfer chamber 200 does not need to be pumped to the background vacuum again in the wafer transfer step among the semiconductor processes, the wafer transfer time is shortened, the film forming efficiency of the semiconductor process is further improved, and the machine productivity is improved. In addition, the semiconductor process chamber structure provided by the invention is particularly suitable for a multi-reaction-zone chamber (that is, a plurality of reaction chambers 100 exist in the same semiconductor process chamber, and the plurality of reaction chambers 100 are communicated with the same transmission chamber 200 below), as shown in fig. 5, the sealing ring 410 and the first elastic sealing cylinder 420 can strictly seal the reaction chambers 100, so that the problem of mutual interference of air flows among the reaction zones (reaction chambers 100) in the multi-reaction-zone chamber can be solved, and the film forming quality of the multi-reaction-zone chamber can be improved.

In order to further improve the process effect of the semiconductor process in the reaction chamber 100 and maintain the cleanliness of the structure below the susceptor 300, as a preferred embodiment of the present invention, the semiconductor process chamber further comprises a purging device (not shown), as shown in fig. 4, for introducing a purging gas a into the first elastic sealing cylinder 420 through the through hole 250 at the bottom of the transfer chamber 200.

Step S3 further includes controlling the purge device to introduce the purge gas a into the first elastic sealing cylinder 420 during the semiconductor process.

In the embodiment of the invention, the purging device can introduce the purging gas a into the first elastic sealing cylinder 420 through the through hole 250 at the bottom of the transmission cavity 200 in the semiconductor process, so that the pressure of the gas in the lower space of the base 300 can be ensured to be higher than the pressure of the process gas in the reaction zone, the process gas is prevented from entering the lower space of the base 300 and forming films and particles (no dead zone exists in the space between the first elastic sealing cylinder 420, the sealing ring 410 and the base 300, and the gas flow is smooth from bottom to top), and the cleanliness of the surface of the structure below the base 300 is ensured. And the process gas does not enter the space under the susceptor 300 filled with the purge gas a, thereby reducing the region to be filled with the process gas, i.e., reducing the volume of the reaction region, increasing the concentration of the process gas after the same amount of process gas enters the reaction region, and further increasing the film forming rate of the semiconductor process.

In order to simplify the positioning and transferring actions of the external robot after the external robot is inserted into the transfer chamber 200 and improve the stability of the position of the wafer 700, as a preferred embodiment of the present invention, as shown in fig. 5 and 7, the semiconductor process chamber includes a plurality of reaction chambers 100, and the transfer chamber 200 is provided with a transfer robot 600 for transferring the wafer 700 between the susceptors 300 corresponding to different reaction chambers 100;

as shown in fig. 10, the step S1 of placing the pre-process wafer 700 on the susceptor 300 includes:

step S11, placing the pre-process wafer 700 on a portion of the susceptor 300;

step S12, controlling the transfer robot 600 to transfer the pre-process wafer 700 on a part of the susceptors 300 to another susceptor 300;

step S13, place the pre-process wafer 700 on the partial susceptor 300 again.

Accordingly, as shown in fig. 11, the step S5 of removing the processed wafer 700 on the susceptor 300 includes:

step S51, removing a portion of the processed wafer 700 from the susceptor 300;

step S52, controlling the transfer robot 600 to transfer the processed wafer 700 on another susceptor 300 to a part of the susceptor 300;

step S53, remove the processed wafer 700 from the susceptor 300 again.

Specifically, a robot through hole is formed in the bottom wall of the transfer chamber 200, the transfer robot 600 includes a driving assembly and an upper end flange 62, and the top end of the output shaft of the driving assembly passes through the robot through hole and is fixedly connected with the upper end flange 62. The plurality of susceptors 300 corresponding to the plurality of reaction chambers 100 are disposed around the transfer robot 600, the upper flange 62 is fixedly provided with a transfer finger 6161 (including a first transfer finger 611, a second transfer finger 612, a third transfer finger 613, and a fourth transfer finger 614), and the driving assembly is configured to drive the upper flange 62 and the transfer finger 61 fixed thereon to perform a lifting motion and a rotating motion (around an output shaft axis), so that the transfer finger 61 takes off a part of the wafer 700 on the susceptors 300, and places the wafer 700 on another susceptors 300.

Correspondingly, the step S12 of controlling the transfer robot 600 to transfer the pre-process wafer 700 on the partial susceptor 300 to another susceptor 300 includes:

step S121, controlling the driving assembly to drive the upper end flange 62 to lift, so that the height of the transmission finger 61 is lifted to a position between the wafer 700 and the bearing surface of the base 300 before the process;

step S122, controlling the driving assembly to drive the upper flange 62 to rotate, so as to enable at least a portion of the transfer finger 61 to rotate below the pre-process wafer 700 on the partial susceptor 300 (for example, in the case that the semiconductor process chamber shown in fig. 7 includes 4 reaction chambers 100, the partial susceptor 300 may be the first susceptor 71 and the fourth susceptor 74), and controlling the driving assembly to drive the upper flange 62 to lift up, so as to enable the transfer finger 61 to remove the pre-process wafer 700 on the partial susceptor 300 (the first susceptor 71 and the fourth susceptor 74);

step S123, controlling the driving assembly to drive the upper end flange 62 to rotate, so that the pre-process wafer 700 carried on the transmission finger 61 is rotated to be located above the other bases 300 (the second base 74 and the third base 73), and controlling the driving assembly to drive the upper end flange 62 to descend, so that the transmission finger 61 places the pre-process wafer 700 on the other bases 300;

step S124, controlling the driving assembly to drive the upper flange 62 to rotate, so that the transmission finger 61 leaves the base 300.

Accordingly, the step S52 of controlling the transfer robot 600 to transfer the processed wafer 700 on the other susceptor 300 to the partial susceptor 300 includes:

step S521, controlling the driving assembly to drive the upper flange 62 to move up and down, so that the height of the transmission finger 61 moves up and down to a position between the wafer 700 and the bearing surface of the pedestal 300 before the process;

step S522, controlling the driving assembly to drive the upper end flange 62 to rotate, so that at least a part of the transmission fingers 61 rotate to the lower part of the pre-process wafer 700 on the other base 300 (the second base 74 and the third base 73), and controlling the driving assembly to drive the upper end flange 62 to lift, so that the transmission fingers 61 take down the pre-process wafer 700 on the other base 300;

step S523, controlling the driving component to drive the upper end flange 62 to rotate, so that the pre-process wafer 700 carried on the transmission finger 61 is rotated to be located above the partial base 300 (the first base 71 and the fourth base 74), and controlling the driving component to drive the upper end flange 62 to descend, so that the transmission finger 61 places the pre-process wafer 700 on the partial base 300;

in step S524, the driving unit is controlled to rotate the upper flange 62, so that the transferring finger 61 is separated from the base 300.

It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.