阅读说明：本技术 半导体设备及半导体结构的制备方法 (Semiconductor device and method for manufacturing semiconductor structure ) 是由 严勋 于 2020-03-31 设计创作，主要内容包括：本发明涉及一种半导体设备及半导体结构的制备方法,半导体设备包括：对晶圆进行处理的工艺腔室；进气装置,用于向工艺腔室内通入气体；气体分配盘,位于晶圆上方,且位于气体的流动路径上；至少部分气体穿过气体分配盘流向晶圆的表面。上述半导体设备,气体分配盘能够使得气体在晶圆表面的流速均匀,使得晶圆表面的温度均匀,减小晶圆表面中心区域和边缘区域的温度差,从而使得光刻形成的图形结构的线宽均匀。(The invention relates to a semiconductor device and a method for manufacturing a semiconductor structure, the semiconductor device comprises: a process chamber for processing the wafer; the gas inlet device is used for introducing gas into the process chamber; the gas distribution plate is positioned above the wafer and positioned on a flow path of the gas; at least a portion of the gas flows through the gas distribution plate toward the surface of the wafer. According to the semiconductor equipment, the gas distribution plate can enable the flow velocity of gas on the surface of the wafer to be uniform, so that the temperature of the surface of the wafer is uniform, the temperature difference between the central area and the edge area of the surface of the wafer is reduced, and the line width of a graph structure formed by photoetching is uniform.)

1. A semiconductor device, comprising:

a process chamber for processing the wafer;

the gas inlet device is used for introducing gas into the process chamber;

a gas distribution plate located above the wafer and on a flow path of the gas; at least a portion of the gas flows through the gas distribution plate toward the surface of the wafer.

2. The semiconductor apparatus of claim 1, wherein the gas distribution plate is parallel to the wafer.

3. The semiconductor device according to claim 1, wherein the semiconductor device comprises a developing device.

4. The semiconductor apparatus of claim 1, wherein an orthographic projection of the gas distribution plate on the wafer surface covers at least the wafer.

5. The semiconductor device of claim 1, wherein the gas distribution plate comprises a plurality of vent holes.

6. The semiconductor device of claim 5, wherein the vent holes of the gas distribution plate in a center region have an area larger than the vent holes in an edge region.

7. The semiconductor device according to claim 5, wherein the vent holes include a first vent hole, a plurality of second vent holes, a plurality of third vent holes, a plurality of fourth vent holes; the first vent hole is located in the center of the gas distribution plate; the plurality of second vent holes are positioned at the periphery of the first vent holes and are distributed at intervals along the circumferential direction of the gas distribution plate; the plurality of third vent holes are positioned at the periphery of the second vent holes and are distributed at intervals along the circumferential direction of the gas distribution plate; the plurality of fourth vent holes are positioned at the periphery of the third vent hole and are distributed at intervals along the circumferential direction of the gas distribution plate; the area sizes of the first vent hole, the second vent hole, the third vent hole and the fourth vent hole are sequentially decreased progressively.

8. The semiconductor device according to claim 7, wherein the first vent hole, the second vent hole, the third vent hole, and the fourth vent hole have a shape including a circle, a radius of the first vent hole is between 7mm and 12mm, a radius of the second vent hole is between 6mm and 10mm, a radius of the third vent hole is between 4mm and 6mm, and a radius of the fourth vent hole is between 2mm and 6 mm.

9. The semiconductor apparatus of claim 1, wherein the number of the gas distribution plate is plural, and the plural gas distribution plates are arranged in parallel, stacked and spaced apart.

10. The semiconductor device of claim 9, wherein a distance between adjacent gas distribution plates is between 1cm and 3 cm.

11. The semiconductor device according to claim 1, further comprising: and the driving device is connected with the gas distribution plate and is used for driving the gas distribution plate to rotate.

12. The semiconductor device according to claim 1, further comprising: and the air exhaust device is communicated with the inside of the process chamber and is used for exhausting waste gas.

13. A method for fabricating a semiconductor structure, comprising:

providing a wafer and a semiconductor device according to any of claims 1-12, placing the wafer under the gas distribution plate;

and in the process of processing the wafer, introducing the gas into the process chamber through the gas inlet device, wherein at least part of the gas flows to the surface of the wafer through the gas distribution plate.

14. The method as claimed in claim 13, wherein during the developing process, the gas is introduced into the process chamber through the gas inlet device, and at least a portion of the gas flows toward the wafer surface through the gas distribution plate.

Technical Field

The present invention relates to the field of semiconductor manufacturing, and in particular, to a semiconductor device and a method for manufacturing a semiconductor structure.

Background

Photolithography (photolithography) is a process of removing a specific portion of a thin film on the surface of a wafer through a series of production steps. After that, a film with a micro-pattern structure is left on the surface of the wafer. Through the photolithography process, the feature pattern portion is finally remained on the wafer. The general photolithography process includes the steps of cleaning and drying the surface of a silicon wafer, coating a base, spin-coating a photoresist, soft baking, alignment exposure, post-baking, developing, hard baking, etching, detecting and the like. However, the feature sizes of the central region and the edge region of the wafer are often inconsistent, which seriously affects the yield of the device, and the process parameters are difficult to control.

Disclosure of Invention

In view of the above, the present invention provides a semiconductor device and a method for fabricating a semiconductor structure.

The present invention provides a semiconductor device, including: a process chamber for processing the wafer; the gas inlet device is used for introducing gas into the process chamber; a gas distribution plate located above the wafer and on a flow path of the gas; at least a portion of the gas flows through the gas distribution plate toward the surface of the wafer.

According to the semiconductor equipment, the gas distribution plate can enable the flow velocity of gas on the surface of the wafer to be uniform, so that the temperature of the surface of the wafer is uniform, the temperature difference between the central area and the edge area of the surface of the wafer is reduced, and the line width of a graph structure formed by photoetching is uniform.

In one embodiment, the gas distribution plate is parallel to the wafer.

In one embodiment, the semiconductor device includes a developing device.

In one embodiment, an orthographic projection of the gas distribution plate on the surface of the wafer covers at least the wafer.

In one embodiment, the gas distribution plate includes a plurality of vent holes.

In one embodiment, the area of the vent holes in the central region of the gas distribution plate is larger than the area of the vent holes in the edge region. The area of the vent holes in the central area of the gas distribution plate is larger than that of the vent holes in the edge area, so that the flow rate of the gas on the surface of the wafer is uniform, and the flow rate difference of the gas in the central area and the edge area of the wafer is reduced.

In one embodiment, the vent holes comprise a first vent hole, a plurality of second vent holes, a plurality of third vent holes and a plurality of fourth vent holes; the first vent hole is located in the center of the gas distribution plate; the plurality of second vent holes are positioned at the periphery of the first vent holes and are distributed at intervals along the circumferential direction of the gas distribution plate; the plurality of third vent holes are positioned at the periphery of the second vent holes and are distributed at intervals along the circumferential direction of the gas distribution plate; the plurality of fourth vent holes are positioned at the periphery of the third vent hole and are distributed at intervals along the circumferential direction of the gas distribution plate; the area sizes of the first vent hole, the second vent hole, the third vent hole and the fourth vent hole are sequentially decreased progressively.

In one embodiment, the first vent hole, the second vent hole, the third vent hole and the fourth vent hole have a circular shape, the radius of the first vent hole is 7mm to 12mm, the radius of the second vent hole is 6mm to 10mm, the radius of the third vent hole is 4mm to 6mm, and the radius of the fourth vent hole is 2mm to 6 mm.

In one embodiment, the number of the gas distribution plates is multiple, and the gas distribution plates are arranged in parallel and at intervals in a stacked manner. The number of the gas distribution plates is multiple, and the gas distribution plates are arranged in a parallel stacking and interval mode, so that the flow velocity of gas on the surface of the wafer is uniform, and the flow velocity difference of the gas in the center area and the edge area of the wafer is reduced.

In one embodiment, the distance between adjacent gas distribution plates is between 1cm and 3 cm.

In one embodiment, the method further comprises the following steps: and the driving device is connected with the gas distribution plate and is used for driving the gas distribution plate to rotate. The driving device is connected with the gas distribution plate and used for driving the gas distribution plate to rotate, so that the flow rate of gas on the surface of the wafer is uniform, and the flow rate difference of the gas in the central area and the edge area of the wafer is reduced.

In one embodiment, the method further comprises the following steps: and the air exhaust device is communicated with the inside of the process chamber and is used for exhausting waste gas.

The invention also provides a preparation method of the semiconductor structure, which comprises the following steps: providing a wafer and the semiconductor device, and placing the wafer below the gas distribution plate; and in the process of processing the wafer, introducing the gas into the process chamber through the gas inlet device, wherein at least part of the gas flows to the surface of the wafer through the gas distribution plate.

The preparation method of the semiconductor structure uses the semiconductor equipment, wherein the gas distribution plate can enable the flow velocity of gas on the surface of the wafer to be uniform, so that the temperature of the surface of the wafer is uniform, the temperature difference between the central area and the edge area of the surface of the wafer is reduced, and the line width of the pattern structure formed by photoetching is uniform.

In one embodiment, during the developing process of the wafer, the gas is introduced into the process chamber through the gas inlet device, and at least part of the gas flows to the surface of the wafer through the gas distribution plate.

Drawings

FIG. 1 is a side view of a gas distribution plate in a semiconductor device of the present invention.

FIGS. 2 to 3 are top views of a gas distribution plate in a semiconductor device according to the present invention.

FIG. 4 is a flow chart of a method of fabricating a semiconductor structure according to the present invention.

In the figure: 10. a wafer; 20. a gas distribution plate; 30. a vent hole; 301. a first vent hole; 302. a second vent hole; 303. a third vent hole; 304. a fourth vent hole; 40. an air inlet; 50. an air suction opening.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on methods or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In one embodiment, there is provided a semiconductor device including: a process chamber for processing the wafer 10; the gas inlet device is used for introducing gas into the process chamber; a gas distribution plate 20 located above the wafer 10, as shown in fig. 1, and located in a flow path of the gas; at least a portion of the gas flows across the gas distribution plate 20 toward the surface of the wafer 10.

In the semiconductor apparatus of the present embodiment, the gas distribution plate 20 can make the flow rate of the gas on the surface of the wafer 10 uniform, so that the temperature on the surface of the wafer 10 is uniform, and the temperature difference between the central area and the edge area on the surface of the wafer 10 is reduced, so that the line width of the pattern structure formed by photolithography is uniform.

In one embodiment, the gas distribution plate 20 is parallel to the wafer 10.

In one embodiment, the semiconductor device includes a developing device.

The general photolithography process includes the steps of cleaning and drying the surface of a silicon wafer, priming, spin-coating a photoresist, soft baking, alignment exposure, post-baking, developing, hard baking, etching, detecting and the like. The developing apparatus is an apparatus for performing a developing process on the photoresist.

In one embodiment, an orthographic projection of the gas distribution plate 20 on the surface of the wafer 10 covers at least the wafer 10.

In one embodiment, the gas distribution plate 20 includes a number of vent holes 30.

In one embodiment, the gas distribution plate 20 is hollow in the middle, and the hollow pattern is not limited and falls within the scope of the present invention.

In one embodiment, the shape of the vent 30 includes any shape, including circular, rectangular, triangular, etc.

In another embodiment, the shape of the vent 30 may also include any shape such as an arc, a bar, etc.

In one embodiment, as shown in FIG. 3, the shape of the vent 30 includes an arc.

In one embodiment, the area of the vent holes 30 in the center region of the gas distribution plate 20 is greater than the area of the vent holes 30 in the edge region. The area of the gas holes 30 in the central area of the gas distribution plate 20 is larger than that of the gas holes 30 in the edge area, so that the flow rate of the gas on the surface of the wafer 10 is uniform, and the difference between the flow rates of the gas in the central area and the edge area of the wafer 10 is reduced.

When the gas is concentrated at the center of the wafer 10 and rushes to the center of the wafer 10 and flows out to the edge of the wafer 10, the gas rushes to the center of the wafer 10 at a flow rate in a vertical direction, at this time, the direction of the gas flow is changed, and the gas flows out from the center of the wafer 10 to the edge of the wafer 10, and during this process, the flow rate of the gas is gradually increased, so that the flow rate at the edge of the wafer 10 is greater than that at the center of the wafer 10, and thus, the temperature difference between the edge area and the center area of the wafer 10 is caused. When the gas distribution plate 20 is disposed, a portion of the gas passes through the vent holes at the edge region of the gas distribution plate 20 and directly reaches the edge region of the wafer 10, at this time, the gas can directly and uniformly impact the whole wafer 10 at a flow velocity in the vertical direction, the gas flow direction after reaching the wafer 10 is changed to flow out from the edge of the wafer 10, although the gas at the center region also passes through the process from the center to the edge, the velocity is not greatly increased by the impact of the vertical flow velocity of the edge gas in the process, and the gas at the edge region impacts the edge region of the wafer 10 at the flow velocity in the vertical direction, so that the difference of the flow velocities at the surface of the wafer 10 is small after the gas distribution plate 20 is disposed, and the temperature difference at the surface of the wafer 10 is small.

In one embodiment, as shown in fig. 2, the vent holes 30 include a first vent hole 301, a plurality of second vent holes 302, a plurality of third vent holes 303, a plurality of fourth vent holes 304; the first vent hole 301 is located in the center of the gas distribution plate 20; a plurality of second vent holes 302 are positioned at the periphery of the first vent hole 301 and are arranged at intervals along the circumferential direction of the gas distribution plate 20; a plurality of third venting holes 303 are positioned at the periphery of the second venting holes 302 and are arranged at intervals along the circumferential direction of the gas distribution plate 20; a plurality of fourth vent holes 304 are positioned at the periphery of the third vent hole 303 and are arranged at intervals along the circumferential direction of the gas distribution plate 20; the area sizes of the first vent hole 301, the second vent hole 302, the third vent hole 303 and the fourth vent hole 304 are sequentially decreased.

In this embodiment, the plurality of second ventilation holes 302 are circumferentially arranged at equal intervals, the plurality of third ventilation holes 303 are circumferentially arranged at equal intervals, and the plurality of fourth ventilation holes 304 are circumferentially arranged at equal intervals.

In one embodiment, the shape of the first, second, third and fourth ventilation holes 301, 302, 303 and 304 includes a circle, and the radius of the first ventilation hole 301 is between 7mm and 12mm, and preferably, the radius of the first ventilation hole 301 may be 10 mm. The radius of the second ventilation hole 302 is between 6mm and 10mm, and preferably, the radius of the second ventilation hole 302 may be 8 mm. The radius of the third venting hole 303 is between 4mm and 6mm, and preferably, the radius of the third venting hole 303 may be 6 mm. The radius of the fourth vent hole 304 is between 2mm and 6mm, and preferably, the radius of the fourth vent hole 304 may be 4 mm.

In one embodiment, the number of the first vent holes 301 may be 1, the number of the second vent holes 302 may be 6, the number of the third vent holes 303 may be 8, and the number of the fourth vent holes 304 may be 24.

In one embodiment, the gas distribution plate 20 includes any combination of first vent holes 301, second vent holes 302, third vent holes 303, and fourth vent holes 304.

In one embodiment, the shape of the gas distribution plate 20 comprises a circle, and the center of the gas distribution plate 20 is collinear with the center of the wafer 10.

In one embodiment, the number of the gas distribution plate 20 is plural, and the plural gas distribution plates 20 are stacked in parallel and spaced apart. The number of the gas distribution plates 20 is multiple, and the plurality of gas distribution plates 20 are arranged in parallel and at intervals in a stacked manner, so that the flow rate of the gas on the surface of the wafer 10 is uniform, and the difference between the flow rates of the gas in the central area and the edge area of the wafer 10 is reduced.

In one embodiment, the number of gas distribution plates 20 may be 1, 2, 3, 4, or more, and is not limited herein.

In one embodiment, the distance between adjacent gas distribution plates 20 is between 1cm and 3cm, and preferably, the distance between adjacent gas distribution plates 20 may be 1.5 cm.

In one embodiment, further comprising: and the driving device is connected with the gas distribution plate 20 and is used for driving the gas distribution plate 20 to rotate. The driving device is connected to the gas distribution plate 20 for driving the gas distribution plate 20 to rotate, so that the flow rate of the gas on the surface of the wafer 10 is uniform, and the difference between the flow rates of the gas in the center area and the edge area of the wafer 10 is reduced.

In one embodiment, the number of the gas distribution plate 20 is plural, the plural gas distribution plates 20 are arranged in parallel and stacked at intervals, and the driving device drives the gas distribution plates 20 to rotate, thereby adjusting the gas flow rate.

In one embodiment, the number of the gas distribution plate 20 is plural, the plural gas distribution plates 20 are stacked in parallel and spaced apart, and the vent holes 30 of the plural gas distribution plates 20 are arranged in a staggered manner.

In one embodiment, the number of the gas distribution plates 20 is multiple, the gas distribution plates 20 are arranged in parallel and at intervals in a stacked manner, and the driving device drives the gas distribution plates 20 to rotate by a certain angle according to the temperature difference between the central area and the edge area of the surface of the wafer 10, so that the vent holes 30 on the gas distribution plates 20 can be arranged in a staggered manner to a certain extent, thereby controllably adjusting the temperature difference between the central area and the edge area of the surface of the wafer 10, optimizing the state of the gas distribution plates 20, and facilitating the temperature uniformity of the surface of the wafer.

In one embodiment, the number of the gas distribution plates 20 is 2, and the driving device drives the upper gas distribution plate 20 to rotate, so that the flow rate of the gas on the surface of the wafer 10 is uniform, and the difference between the flow rates of the gas in the center area and the edge area of the wafer 10 is reduced, so that the temperature on the surface of the wafer is uniform.

In another embodiment, the number of gas distribution plates 20 is 2, and the 2 gas distribution plates 20 rotate in the same direction.

In another embodiment, the number of gas distribution plates 20 is 2, and the 2 gas distribution plates 20 rotate in opposite directions.

In another embodiment, the number of gas distribution plates 20 is greater than 2, and the gas distribution plates 20 rotate in the same direction.

In another embodiment, the number of gas distribution plates 20 is greater than 2, and adjacent gas distribution plates 20 rotate in opposite directions.

In one embodiment, the number of the gas distribution plates 20 is plural, and the driving device drives only the uppermost gas distribution plate 20 to rotate.

In one embodiment, further comprising: and the air exhaust device is communicated with the inside of the process chamber and is used for exhausting waste gas.

In one embodiment, the suction opening 50 of the suction device is located directly below the wafer 10 and faces the backside of the wafer 10.

In one embodiment, the suction opening 50 of the suction device is located at the bottom edge of the process chamber.

In one embodiment, the suction opening 50 is located at the lower edge of the wafer 10.

In one embodiment, the gas inlet is located directly above the wafer 10 with the gas inlet 40 facing the wafer 10, the gas distribution plate 20 is located between the wafer 10 and the gas inlet, and the center of the gas inlet 40, the center of the gas distribution plate 20, and the center of the wafer 10 are located on the same line.

In another embodiment, the gas distribution plate 20 is integral with the gas inlet device and is located at the inlet of the gas inlet device.

In one embodiment, the flow direction of the gas introduced by the gas inlet means is perpendicular to the plane of the gas distribution plate 20.

The invention discloses a developing device for a wafer 10, which comprises a developing device, a developing device and a developing device, wherein the developing device comprises a wafer 10, a liquid inlet pipe, a liquid outlet pipe and a liquid outlet pipe, wherein the liquid inlet pipe is connected with the liquid inlet pipe, the liquid outlet pipe is connected with the liquid outlet pipe, the liquid inlet pipe is connected with the liquid outlet pipe, the liquid outlet pipe is connected with the liquid inlet pipe, the liquid outlet pipe is connected with the liquid outlet pipe, and the liquid outlet pipe is connected with the liquid outlet pipe. The provision of the gas distribution plate 20 of the present invention solves these problems very well.

In one embodiment, as shown in fig. 4, a method for fabricating a semiconductor structure is provided, comprising: providing a wafer 10 and the semiconductor device, and placing the wafer 10 below a gas distribution plate 20; during the processing of the wafer 10, gas is introduced into the process chamber through the gas inlet device, and at least a portion of the gas flows through the gas distribution plate 20 toward the surface of the wafer 10.

S10: a wafer 10 and the semiconductor device as described are provided, the wafer 10 being placed under a gas distribution plate 20.

S20: during the processing of the wafer 10, gas is introduced into the process chamber through the gas inlet device, and at least a portion of the gas flows through the gas distribution plate 20 toward the surface of the wafer 10.

In this embodiment, the above method for manufacturing a semiconductor structure uses the semiconductor device, wherein the gas distribution plate 20 can make the flow rate of the gas on the surface of the wafer 10 uniform, so that the temperature of the surface of the wafer 10 is uniform, and the temperature difference between the central area and the edge area of the surface of the wafer 10 is reduced, so that the line width of the pattern structure formed by photolithography is uniform.

In one embodiment, during the developing process of the wafer 10, gas is introduced into the process chamber through the gas inlet device, and at least a portion of the gas flows through the gas distribution plate 20 toward the surface of the wafer 10.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.