阅读说明：本技术 半导体设备中的磁力件结构以及半导体磁控溅射设备 (Magnetic force piece structure in semiconductor equipment and semiconductor magnetron sputtering equipment ) 是由 俞振铎 于 2020-04-07 设计创作，主要内容包括：本发明公开一种半导体设备中的磁力件结构以及半导体磁控溅射设备,磁力件结构环绕设置于半导体反应腔室的外部,其特征在于,磁力件结构包括：环形支撑件、多个磁力件框架和多个磁力件；多个磁力件框架设置在环形支撑件上,且沿环形支撑件周向分布；磁力件对应安装于磁力件框架内,以使磁力件的轴线与反应腔室的轴线之间形成预设的第一安装角,第一安装角的角度可调节；通过调节边磁铁的轴线与反应腔室的轴线所形成第一安装角,从而调整边磁铁的磁场对晶圆表面作用范围,灵活地改变磁场方向,满足不同工艺需求,提高工艺的均匀性,保证更好的工艺结果。(The invention discloses a magnetic force piece structure in semiconductor equipment and semiconductor magnetron sputtering equipment, wherein the magnetic force piece structure is arranged outside a semiconductor reaction chamber in a surrounding manner, and the magnetic force piece structure is characterized by comprising: the magnetic force piece frame comprises an annular support piece, a plurality of magnetic force piece frames and a plurality of magnetic force pieces; the magnetic force piece frames are arranged on the annular supporting piece and are distributed along the circumferential direction of the annular supporting piece; the magnetic member is correspondingly arranged in the magnetic member frame, so that a preset first installation angle is formed between the axis of the magnetic member and the axis of the reaction chamber, and the angle of the first installation angle is adjustable; the first installation angle is formed by adjusting the axis of the edge magnet and the axis of the reaction chamber, so that the action range of the magnetic field of the edge magnet on the surface of the wafer is adjusted, the direction of the magnetic field is flexibly changed, different process requirements are met, the uniformity of the process is improved, and a better process result is ensured.)

1. A magnetic member structure in a semiconductor device, the magnetic member structure being disposed around an exterior of a semiconductor reaction chamber, the magnetic member structure comprising: the device comprises an annular support member (1), a plurality of magnetic member frames (2) and a plurality of magnetic members (3);

the magnetic piece frames (2) are arranged on the annular support piece (1) and are distributed along the circumferential direction of the annular support piece (1); the magnetic member (3) is correspondingly arranged in the magnetic member frame (2), so that a preset first installation angle is formed between the axis of the magnetic member (3) and the axis of the reaction chamber, and the angle of the first installation angle is adjustable.

2. The magnetic member structure according to claim 1, wherein two ends of the magnetic member (3) are connected to the inner side of the magnetic member frame (2), the periphery of the magnetic member frame (2) is provided with a plurality of mounting surfaces, and each mounting surface is provided with a frame surface mounting hole for fixing the mounting surface to the annular support member (1); the annular supporting piece is connected with the mounting hole through a screw, and the magnetic piece frame (3) can be connected with the annular supporting piece (1) through any mounting surface to adjust the first mounting angle.

3. The magnetic member structure according to claim 2, wherein the annular support member (1) comprises an upper ring frame (4), a lower ring frame (5) and a connecting portion (6), the upper ring frame (4) and the lower ring frame (5) are parallel to each other, the axis of the upper ring frame (4) coincides with the axis of the lower ring frame (5), the connecting portion (6) is connected between the upper ring frame (4) and the lower ring frame (5), and the upper ring frame (4) is detachably connected to the lower ring frame (5) through the connecting portion (6);

a plurality of first mounting holes (8) are distributed along the circumferential direction of the upper ring frame (4), a plurality of second mounting holes (9) are distributed along the circumferential direction of the lower ring frame (5), and the positions of the first mounting holes (8) correspond to the positions of the second mounting holes (9) one by one;

each mounting surface is provided with a frame surface mounting hole (10), and the magnetic piece frame (2) is connected with the upper ring frame (4) and/or the lower ring frame (5) through the frame surface mounting holes of the mounting surface.

4. The magnetic member structure according to claim 1, wherein the magnetic member (3) is a bar-shaped magnetic member, and the magnetic member frame (2) is a regular polygonal prism structure.

5. The magnetic member structure according to claim 1, wherein at least one pair of mounting grooves (7) are provided along the inner circumference of the magnetic member frame (2), each pair of the mounting grooves (7) being oppositely provided on the inner circumference of the magnetic member frame (2), and mounting portions are provided at both ends of the magnetic member (3), the mounting portions being disposed in the pair of mounting grooves for fixing the magnetic member (3) in the magnetic member frame (2).

6. The magnetic member structure of claim 5, wherein a stop piece (11) is arranged outside the notch of the mounting groove, and the stop piece (11) is used for fixing the magnetic member (3) in the magnetic member frame (2).

7. The magnetic member structure of claim 6, wherein the notch of the mounting groove (7) is provided with third mounting holes (17) on both sides, and the baffle plate (11) is connected with the third mounting holes (17) through screws.

8. A semiconductor magnetron sputtering apparatus comprising a reaction chamber and a magnetic member structure according to any one of claims 1 to 7.

Technical Field

The invention belongs to the field of integrated circuit manufacturing equipment, and particularly relates to a magnetic force piece structure in semiconductor equipment and semiconductor magnetron sputtering equipment.

Background

Magnetron sputtering in Physical Vapor Deposition (PVD) is one of the most widely used techniques in the subsequent fabrication of integrated circuit chips. Metal interconnects, hard masks, packaging all require the use of PVD techniques. Generally, magnetron sputtering is the deposition of thin film materials on wafers, especially the deposition of Al metal interconnects. In recent years, the importance and challenges of depositing dielectric and metal layers using vertical interconnect technology have become increasingly apparent in high aspect ratio vias. The situation is changed through the Cu metal interconnection, and the circuit stability is enhanced due to the relatively low resistivity and the excellent electromigration resistance of the Cu metal layer; meanwhile, the low-dielectric-constant dielectric material replaces silicon dioxide to become an insulating medium between metal layers, so that the parasitic capacitance between metal connecting line layers is reduced, and the speed of the integrated circuit is greatly improved.

In a Physical Vapor Deposition (PVD) process of Cu interconnection, a dc magnetron sputtering technique is generally used to prepare a copper thin film, which is a process in which sputtering and re-sputtering are performed simultaneously. When the copper target is connected with a power supply, the surface of the target is bombarded by argon ions, and copper atoms and copper ions are generated on the bombarded surface of the target simultaneously. The copper atoms and the copper ions gradually fall down, and the copper atoms finally fall on the surface of the wafer to form a copper film; the copper ions are accelerated to fall under the action of the radio frequency negative bias voltage electric field, so that when the copper ions finally reach the surface of the wafer, a very large energy is provided, so that a large impact is caused on the surface of the wafer, and finally, a part of copper atoms originally deposited on the surface of the wafer are sputtered to fall to a place outside the surface of the wafer, and the form is called as re-sputtering. This redistributes the copper film. During the manufacturing process, the distribution of copper ions above the wafer surface affects the process result of the copper film to some extent. As feature sizes shrink, via and trench openings and aspect ratios will decrease, and process requirements for copper films will increase.

Fig. 1 shows a schematic structural diagram of a conventional magnetron sputtering apparatus, and as shown in fig. 1, a conventional method is to add a device with an edge magnet 3 outside a copper chamber, an upper electrode 14 is arranged outside the upper part of the copper chamber, and the edge magnet 3 is arranged on the upper part of a lower electrode 15. The copper ions are more uniformly distributed on the surface of the wafer through the constraint action of the magnetic field of the edge magnet 3 on the copper ions, so that a better copper film is obtained.

Fig. 2 shows a schematic structural diagram of a conventional edge magnet, and as shown in fig. 2, the conventional edge magnet structure is that 12 edge magnets 3 with a diameter of 17mm and a height of 33mm are fixed in a circular frame 13 to form a ring-shaped edge magnet structure, and finally the circular frame 13 is placed outside a copper chamber, so that a magnetic field can restrain copper ions, and a copper thin film process is finally realized.

The number and the placement positions of the magnets in the existing edge magnet structure are fixed, and although the copper ions on the surface of the wafer are restrained to a certain degree, the action range of the edge magnet structure is limited; when the process result needs to be changed, the position of the side magnet cannot be correspondingly adjusted, the expected effect of the product cannot be achieved, and a satisfactory process result cannot be finally obtained, so that the existing device has a single function.

Therefore, it is desirable to provide a magnetic member structure in a semiconductor device and a semiconductor magnetron sputtering device, which can adjust the position of the edge magnet accordingly to meet different process requirements and ensure better process results.

Disclosure of Invention

The invention aims to provide a magnetic piece structure in semiconductor equipment and semiconductor magnetron sputtering equipment, which can adjust the angle between the axis of the magnetic piece and the axis of a reaction chamber according to different process requirements so as to meet different processes and ensure better process results.

In order to achieve the above object, according to an aspect of the present invention, there is provided a magnetic member structure in a semiconductor apparatus, the magnetic member structure being disposed around an outside of a semiconductor reaction chamber, the magnetic member structure comprising: the magnetic force piece frame comprises an annular support piece, a plurality of magnetic force piece frames and a plurality of magnetic force pieces;

the magnetic force piece frames are arranged on the annular supporting piece and are distributed along the circumferential direction of the annular supporting piece; the magnetic member is correspondingly arranged in the magnetic member frame, so that a preset first installation angle is formed between the axis of the magnetic member and the axis of the reaction chamber, and the angle of the first installation angle is adjustable.

Preferably, two ends of the magnetic member are connected to the inner side of the magnetic member frame, a plurality of mounting surfaces are arranged on the periphery of the magnetic member frame, and a frame surface mounting hole for fixing the mounting surfaces to the annular supporting member is formed in each mounting surface; the annular supporting piece is connected with the mounting hole through a screw, and the magnetic piece frame can be connected with the annular supporting piece through any mounting surface so as to adjust the first mounting angle.

Preferably, the annular support comprises an upper annular frame, a lower annular frame and a connecting part, the upper annular frame and the lower annular frame are parallel to each other, the axis of the upper annular frame coincides with the axis of the lower annular frame, the connecting part is connected between the upper annular frame and the lower annular frame, and the upper annular frame is detachably connected to the lower annular frame through the connecting part;

a plurality of first mounting holes are distributed along the circumferential direction of the upper ring frame, a plurality of second mounting holes are distributed along the circumferential direction of the lower ring frame, and the positions of the first mounting holes correspond to the positions of the second mounting holes one to one;

each mounting surface is provided with a frame surface mounting hole, and the magnetic part frame is connected with the upper ring frame and/or the lower ring frame through the frame surface mounting holes of the mounting surface.

Preferably, the magnetic member is strip-shaped, and the magnetic member frame is in a regular polygonal prism structure.

Preferably, at least one pair of mounting grooves are formed in the inner periphery of the magnetic member frame, each pair of mounting grooves are formed in the inner periphery of the magnetic member frame in a relative arrangement mode, mounting portions are arranged at two ends of the magnetic member and are arranged in the pair of mounting grooves, and the magnetic member is fixed in the magnetic member frame.

Preferably, a blocking piece is arranged outside a notch of the mounting groove and used for fixing the magnetic element in the magnetic element frame.

Preferably, third mounting holes are formed in two sides of the notch of the mounting groove, and the blocking piece is connected with the third mounting holes through screws.

According to one aspect of the invention, a semiconductor magnetron sputtering device is provided, which comprises a reaction chamber and the magnetic member structure.

The invention has the beneficial effects that: the magnetic field of the magnetic piece is adjusted to act on the surface of the wafer within a range by adjusting a first mounting angle formed by the axis of the magnetic piece and the axis of the reaction chamber, so that the direction of the magnetic field is flexibly adjusted, different process requirements are met, the uniformity of the process is improved, and a better process result is ensured.

Additional features and advantages of the invention will be set forth in the detailed description which follows.

Drawings

The invention will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

Fig. 1 shows a schematic structural diagram of a conventional magnetron sputtering apparatus.

Fig. 2 is a schematic view showing a structure of a conventional edge magnet.

Fig. 3 shows a schematic view of a structure of a magnetic member according to an embodiment of the present invention.

Fig. 4 shows a front view of a frame of a magnetic member according to an embodiment of the present invention.

FIG. 5 illustrates a top view of a frame of a magnetic force member, according to one embodiment of the present invention.

FIG. 6 illustrates a front view of another magnetic force member frame according to one embodiment of the present invention.

Fig. 7 shows a schematic structural diagram of a magnetic semiconductor magnetron sputtering apparatus according to an embodiment of the present invention.

Description of reference numerals:

1. an annular support member; 2. a magnetic member frame; 3. a magnetic member; 4. an upper ring frame; 5. a lower ring frame; 6. a connecting portion; 7. mounting grooves; 8. a first mounting hole; 9. a second mounting hole; 10. a frame surface mounting hole; 11. a baffle plate; 12. a screw; 13. a circular frame; 14. an upper electrode; 15. a lower electrode; 16. a reaction chamber; 17. and a third mounting hole.

Detailed Description

Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

According to an embodiment of the present invention, a magnetic member structure in a semiconductor device is disposed around an exterior of a semiconductor reaction chamber, and the magnetic member structure includes: the magnetic force piece frame comprises an annular support piece, a plurality of magnetic force piece frames and a plurality of magnetic force pieces; the magnetic force piece frames are arranged on the annular supporting piece and are distributed along the circumferential direction of the annular supporting piece; the magnetic member is correspondingly arranged in the magnetic member frame, so that a preset first installation angle is formed between the axis of the magnetic member and the axis of the reaction chamber, and the angle of the first installation angle is adjustable.

The effect intensity and the angle of magnetic field to the wafer can't be changed to traditional magnetic force spare structure, and the magnetic force spare structure of this embodiment, according to different technology demands, adjust and form first erection angle between the axis of magnetic force spare and the axis of reaction chamber, change the angle between the magnetic line of force of magnetic force spare and reaction chamber axis promptly, thereby adjustment magnetic field is to wafer surface effect scope, the magnetic field that improves magnetic force spare is to the restraint of copper ion, make copper ion more even distribution on the wafer surface, thereby obtain better copper film, guarantee better technological result.

Preferably, two ends of the magnetic part are connected to the inner side of the magnetic part frame, a plurality of mounting surfaces are arranged on the periphery of the magnetic part frame, and each mounting surface is provided with a frame surface mounting hole for fixing the mounting surface on the annular support part; the annular supporting piece is connected with the mounting hole through a screw, and the magnetic piece frame can be connected with the annular supporting piece through any mounting surface so as to adjust the first mounting angle.

Specifically, the both ends of magnetic force spare are connected in the inboard of magnetic force spare frame, and the position of magnetic force spare for the magnetic force spare frame is fixed promptly, through the installation face that conversion magnetic force spare frame and annular support piece are connected, can adjust the first erection angle between the axis of magnetic force spare and the axis of reaction chamber, and the magnetic force spare frame of a plurality of installation faces makes magnetic force spare have multiple angle of setting for the axis of reaction chamber to the realization is to the regulation of the first erection angle of multiple difference.

As preferred scheme, annular support piece includes ring frame, lower ring frame and connecting portion, goes up ring frame and lower ring frame and is parallel to each other, and the axis of going up the ring frame coincides with the axis of lower ring frame, and connecting portion connect between ring frame and lower ring frame, go up ring frame and pass through connecting portion detachably and connect in lower ring frame.

The magnetic member is mounted to the annular support member between the upper and lower ring frames by the magnetic member frame. And every magnetic force spare frame detachably is connected with annular support piece, is convenient for adjust the installation angle of magnetic force spare and adjust magnetic force spare along annular support piece distribution quantity and distribution position, adjusts magnetic field intensity in a flexible way, satisfies different technology demands.

As an example, the connecting part and the lower ring frame are of an integral structure, the upper part of the connecting part is provided with a first screw hole, the upper ring frame is provided with a second screw hole corresponding to the first screw hole, and the upper ring frame is fixed to the lower ring frame through the matching connection of a screw with the first screw hole and the second screw hole, so that the stability of the position fixation between the upper ring frame and the lower ring frame is improved.

As a preferred scheme, a plurality of first mounting holes are distributed along the circumferential direction of the upper ring frame, a plurality of second mounting holes are distributed along the circumferential direction of the lower ring frame, and the positions of the first mounting holes correspond to the positions of the second mounting holes one to one;

each mounting surface is provided with a frame surface mounting hole, and the magnetic piece frame is connected with the upper ring frame and/or the lower ring frame through the frame surface mounting holes of the mounting surface.

Specifically, the frame surface mounting holes of the mounting surface are connected with the first mounting holes of the upper ring frame and the second mounting holes of the lower ring frame through bolts, and the adjusted mounting surface is connected with the annular support piece, so that the mounting angle of the axis of the magnetic piece relative to the axis of the reaction chamber and the number and the positions of the magnetic pieces along the annular support piece are adjusted.

Preferably, the magnetic member is a strip, and the magnetic member frame has a regular polygonal prism structure, such as a triangle, a hexagon, an octagon, etc.

As an example, the plurality of sides of the regular polygon prism structure may serve as a plurality of mounting surfaces, the regular polygon structure has symmetrical size ratio, so as to facilitate connection of different mounting surfaces with the ring-shaped support member by rotation, for example, after two ends of the magnetic member are fixed to the inner side of the regular polygon prism structure, the different mounting surfaces are switched to be connected with the upper ring frame and the lower ring frame, so that a plurality of first mounting angles between the axis of the magnetic member and the axis of the reaction chamber can be adjusted.

Specifically, the magnetic member frame is regular polygon prism structure, and the angle between two adjacent mounting surfaces is the same, so when different mounting surfaces are converted to be connected with the annular support member, the rotatable angle range of the magnetic member frame is limited, therefore, the installation position of the magnetic member relative to the axis of the magnetic member frame can be adjusted, a new angle adjustment range can be obtained within the limited rotation angle range of the magnetic member frame, the adjustment range of the first installation angle is increased, and the uniformity of the process is improved.

Preferably, at least one pair of mounting grooves is formed along the inner periphery of the magnetic member frame, each pair of mounting grooves is oppositely formed in the inner periphery of the magnetic member frame, mounting parts are arranged at two ends of the magnetic member and are arranged in the pair of mounting grooves, and the mounting parts are used for axially fixing the magnetic member in the magnetic member frame.

As an example, a plurality of pairs of mounting grooves are arranged along the inner shaft of the magnetic member frame, and the magnetic members are mounted at different positions along the inner periphery of the magnetic member frame, so that the range of the first mounting angles is changed, and the same set of magnetic member frame can obtain a plurality of sets of value ranges of the first mounting angles.

As an example, the first installation angle of all the magnetic members installed on the same annular support is the same, so as to ensure that the magnetic field lines of all the magnetic members on the same annular support are the same as the axis of the reaction chamber, and the action strength of the magnetic field on the surface of the wafer is enhanced.

Preferably, a blocking piece is arranged outside the notch of the mounting groove and used for radially fixing the magnetic element in the magnetic element frame.

As preferred scheme, the notch both sides of mounting groove are equipped with the third mounting hole, and the separation blade passes through the screw and is connected with the third mounting hole.

As an example, an opening communicated with the mounting groove is formed in the end face of the magnetic member frame, after the mounting portion of the magnetic member is inserted into the mounting groove, the mounting portion is in fit connection with the third mounting hole through a screw, the blocking piece is fixed at the notch of the mounting groove, and radial fixing of the magnetic member is achieved.

The semiconductor magnetron sputtering device comprises a reaction chamber and a magnetic piece structure; the magnetic member structure is arranged around the outer side of the reaction chamber.

According to the magnetron sputtering equipment provided by the invention, the magnetic field intensity and angle of the magnetic member on the reaction chamber can be flexibly adjusted according to the requirements of different processes by utilizing the magnetic member frame provided by the invention, so that different processes are met and a better process result is ensured.