CN108682639B - Wafer wet etching system - Google Patents
Wafer wet etching system Download PDFInfo
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- CN108682639B CN108682639B CN201810491385.4A CN201810491385A CN108682639B CN 108682639 B CN108682639 B CN 108682639B CN 201810491385 A CN201810491385 A CN 201810491385A CN 108682639 B CN108682639 B CN 108682639B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67017—Apparatus for fluid treatment
- H01L21/67063—Apparatus for fluid treatment for etching
- H01L21/67075—Apparatus for fluid treatment for etching for wet etching
- H01L21/6708—Apparatus for fluid treatment for etching for wet etching using mainly spraying means, e.g. nozzles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/677—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations
- H01L21/67763—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations the wafers being stored in a carrier, involving loading and unloading
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/683—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping
Abstract
The invention belongs to the technical field of wet etching, and particularly relates to a wafer wet etching system which comprises a moving module, a grabbing module, a first reaction tank, a second reaction tank, a third reaction tank and a storage barrel, wherein the first reaction tank, the second reaction tank and the third reaction tank are fixedly arranged on the bottom surface of the inner wall of a reaction bin; the moving module is fixedly arranged on the top of the side surface of the inner wall of the reaction bin; the grabbing module is arranged on the moving module, and the storage barrel is used for storing the wafer; the grabbing module is used for grabbing the storage cylinder; the storage barrel is conveyed into the reaction bin from the feeding door; the moving module is matched with the grabbing module to sequentially place the wafers in the storage barrel into the third reaction tank, the second reaction tank and the first reaction tank for etching; finally, the wafer in the storage barrel is taken out through the discharge door; the invention is mainly used for etching the wafer, can improve the use efficiency of the etching liquid, can carry out batch etching on the wafer, and improves the etching efficiency.
Description
Technical Field
The invention belongs to the technical field of wet etching, and particularly relates to a wafer wet etching system.
Background
Various etching processes are often used in semiconductor manufacturing technology, wherein a wet etching process mainly adopts an etching technology that a reaction liquid removes an etching object, specifically, the reaction liquid and the etching object perform a chemical reaction to make the etching object partially separate from the surface of a wafer, so that a required surface is obtained on the wafer. However, in the mass production of wafers, a large amount of etching liquid needs to be consumed, and if the use of the etching liquid can be improved, the production cost can be increased.
Some technical solutions of wet etching apparatuses have appeared in the prior art, for example, a chinese patent with application number 201420593668.7 discloses a wet etching apparatus, which at least includes: an etch bath and at least two filters; the corrosion tank is connected with each filter through a first pipeline and a second pipeline; the first pipeline and the second pipeline are respectively and correspondingly provided with a first valve and a second valve; a liquid inlet pipe communicated with the first pipeline is arranged between the first valve and the filter; and a liquid outlet pipe communicated with the second pipeline is arranged between the second valve and the filter. Although the technical scheme can prolong the service life of the corrosion tank, the technical scheme cannot improve the use efficiency of the etching liquid, so that the cost is wasted, and meanwhile, the scheme cannot realize batch automatic production; so that the invention is limited.
Disclosure of Invention
In order to make up for the defects of the prior art, the invention provides a wafer wet etching system which is mainly used for etching wafers, can improve the use efficiency of etching liquid and can etch wafers in batches; the wafer is subjected to graded etching through the combination of the first reaction tank, the second reaction tank and the third reaction tank; the wafers are subjected to batch etching through the matching of the moving module, the grabbing module and the storage barrel; the etching efficiency of the wafer is improved.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention provides a wafer wet etching system, which comprises a reaction bin, wherein a feeding door and a discharging door are arranged in the reaction bin; the reaction bin is not an innovation of the present invention, and is not described herein. The device comprises a reaction bin, a moving module, a grabbing module, a first reaction tank, a second reaction tank, a third reaction tank and a storage barrel, wherein the first reaction tank, the second reaction tank and the third reaction tank are fixedly arranged on the bottom surface of the inner wall of the reaction bin; the moving module is fixedly arranged on the top of the side surface of the inner wall of the reaction bin; the grabbing module is arranged on the moving module, and the storage barrel is used for storing wafers; the grabbing module is used for grabbing the storage cylinder; when the device works, the storage barrel is conveyed into the reaction bin from the feeding door; the moving module is matched with the grabbing module to sequentially place the wafers in the storage barrel into the third reaction tank, the second reaction tank and the first reaction tank for etching; finally, the wafer in the storage barrel is taken out through the discharge door;
the first reaction tank is connected with the second reaction tank through a first electromagnetic valve; the second reaction tank is connected with the third reaction tank through a second electromagnetic valve; the inner wall of the third reaction tank is provided with a third spray head which is used for spraying the etching liquid in the second reaction tank to a material storage barrel in the third reaction tank; the inner wall of the second reaction tank is provided with a second spray head which is used for spraying the etching liquid in the first reaction tank to a material storage barrel in the second reaction tank; the second spray head and the third spray head are used for cleaning impurities remained on the surface of the wafer, and meanwhile, the utilization rate of the etching liquid is improved; when the ultrasonic etching device works, the first reaction tank, the second reaction tank and the third reaction tank are filled with etching liquid with the same purity, and the material storage cylinder is used for carrying out ultrasonic etching in the third reaction tank, the second reaction tank and the first reaction tank in sequence and shaking out bubbles and impurities on the surface of a wafer; when the moving module and the grabbing module are matched to lift the storage barrel; the second spray head and the third spray head respectively spray the storage barrel and are used for cleaning impurities on the surface of the wafer.
The material storage barrel comprises a third barrel body, a first support frame, a clamping plate and a material storage plate; the clamping plate is fixedly arranged on the top surface of the third cylinder through the first supporting frame, the clamping plate is annular, and the clamping plate is used for being matched with the grabbing module for use; the storage plate is arranged on the inner wall of the third cylinder body and can be detached from the inner wall of the third cylinder body; the material storage plate is used for storing the wafer; the surface of the third cylinder body is provided with a third opening; the third opening is used for conveying the etching liquid to the material storage plate;
the material storage plate is provided with a fourth through hole and a fourth opening; the fourth through hole is used for enabling the etching liquid to penetrate through the material storage plate; the fourth opening is provided with a clamping unit, and the clamping unit is used for clamping the wafer; the clamping unit comprises a plurality of clamping components, the clamping components act on the side surfaces of the wafers, and the clamping components are used for fixing the wafers on one hand and enabling the surfaces of the wafers to be in full contact with etching liquid on the other hand; the clamping component is a mechanical arm, an elastic buckle and the like. The storage plate is detachably mounted on the inner wall of the third barrel, the wafer is arranged in the storage barrel through the storage plate, and when the storage barrel is soaked in the first reaction tank, the second reaction tank and the third reaction tank, etching liquid etches the wafer through the third opening.
Preferably, the moving module comprises a first sliding block, a fixed rod, a fixed plate, a sliding telescopic rod, a first mounting seat, a multi-stage air pressure rod, a mounting plate and a connecting frame, a first sliding groove is formed in the inner wall of a top plate of the reaction bin, and the first sliding block is used for sliding in the first sliding groove; the top surface of the fixed plate is fixedly connected with the first sliding block through a fixed rod; the side surface of the fixed plate is arranged on the inner wall of the reaction bin through a sliding telescopic rod; the multistage air pressure rod is fixedly arranged on the bottom surface of the fixing plate through a first mounting seat; the bottom end of the multistage air pressure rod is fixedly connected with the connecting frame through a mounting plate; the connecting frame is used for fixedly connecting the grabbing module. The first sliding block moves in the first sliding rail and is controlled by a controller; the moving module is matched with the grabbing module to synchronously move the storage barrels in the third reaction tank, the second reaction tank and the first reaction tank to the left by one unit, wherein one unit refers to the distance for the storage barrel in the third reaction tank to move into the second reaction tank; then the grabbing module and the moving module are matched to feed the storage barrel closest to the feeding door into a third reaction tank; the etching liquid can carry out tertiary sculpture to the wafer in the storage cylinder, has improved the utilization ratio of etching liquid, simultaneously, has improved the surface cleanliness behind the wafer sculpture.
Preferably, the grabbing module comprises a first supporting plate, a first supporting rod, a round cylinder and a telescopic unit; the first supporting plate is fixedly connected with the top surface of the circular cylinder through a second supporting frame; a telescopic unit is arranged in the circular cylinder and is connected with a first motor through a rotating shaft; the telescopic unit is used for grabbing the storage cylinder; when the motor rotates, the length of the telescopic unit can be changed, and when the length of the telescopic unit is shortened, the telescopic unit is positioned inside the circular cylinder and used for enabling the circular cylinder to penetrate through the clamping plate in the material storage cylinder; when the telescopic unit length becomes long, a part of the telescopic unit is positioned outside the circular cylinder and is matched with the clamping plate to grab the storage cylinder.
Preferably, the telescopic unit comprises a guide rod, a fixed block, a limiting block and a rotating disc, and second openings are uniformly formed in the side wall of the circular cylinder in a circumferential arrangement mode; the fixed block is fixedly arranged on the side wall of the guide rod, and the guide rod is positioned in the second opening; a spring is arranged between the second opening and the fixed block; the rotating disc is fixedly connected with the first motor through a rotating shaft, and the outer wall of the rotating disc is in contact with one end of the guide rod; the rotating disc is a cam disc; the limiting block is fixedly installed in the inner wall of the round barrel and used for limiting the guide rod. The cam plate is matched with the guide rod to change the distance from the guide rod to the outside of the circular cylinder, so that the telescopic unit can fix the storage cylinder.
Preferably, the number of the clamping parts is six to nine; the clamping component comprises a fixed column, a connecting rod, a second sliding block and a first spring; the side surface of the fixed column is hinged with one end of each of the two connecting rods, the other end of each of the two connecting rods is hinged to the second sliding block, and a first spring is fixedly connected between the two connecting rods. The clamping components are used for effectively fixing the wafers, and meanwhile, the first spring can be matched with the connecting rod to enable the clamping components to fix the wafers with different diameters; the fixing column is in line contact with the side surface of the wafer, so that etching liquid can flow on the surface of the wafer, the etching efficiency of the wafer is improved, impurities on the surface of the wafer can slide off from the surface of the wafer, and the cleanliness of the surface of the wafer is improved.
The invention has the beneficial effects that:
1. the wafer wet etching system comprises a moving module, a grabbing module, a first reaction tank, a second reaction tank, a third reaction tank and a storage barrel, wherein the first reaction tank, the second reaction tank and the third reaction tank are used for carrying out multistage etching on wafers in the storage barrel; meanwhile, after the wafer etching device works for a period of time, the etching liquid in the third reaction tank is discharged, the etching liquid in the second reaction tank is conveyed to the third reaction tank, then the etching liquid in the first reaction tank is conveyed to the second reaction tank, and pure etching liquid is conveyed to the first reaction tank, so that the impurity residue on the surface of the wafer is reduced, and meanwhile, the utilization efficiency of the etching liquid is improved.
2. According to the wafer wet etching system, the material storage barrel is internally provided with the material storage plate, and the material storage plate is provided with the four openings; the clamping unit is arranged in the fourth opening and used for fixing the wafer; the clamping unit comprises a plurality of clamping components which are matched together to clamp the wafer; the clamping degree of the wafer is improved.
3. The invention relates to a wafer wet etching system.A clamping component comprises a fixed column, a connecting rod, a second sliding block and a first spring; the fixed column is hinged with the second sliding block through a connecting rod, the side surface of the fixed column is hinged with two connecting rods, and the two connecting rods are clamped through a first spring; the second sliding block enables the fixed column to move through matching with the connecting rod, and the first spring enables the fixed column to clamp the side surface of the wafer through matching with the connecting rod; the clamping component is used for clamping wafers with different diameters, and meanwhile, the wafer clamping device improves the convenience for mounting the wafers in the clamping component and improves the production efficiency.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a front view of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1;
FIG. 3 is a cross-sectional view B-B of FIG. 2;
FIG. 4 is a cross-sectional view C-C of FIG. 2;
FIG. 5 is an enlarged view of a portion D of FIG. 3;
in the figure: a reaction bin 1, a feeding door 11, a discharging door 12, a moving module 2, a grabbing module 3, a first reaction tank 13, a second reaction tank 14, a third reaction tank 15, a material storage barrel 4, a wafer 16, a first electromagnetic valve 17, a second electromagnetic valve 18, a third spray head 51, a second spray head 52, a third barrel 41, a first support frame 42, a clamping plate 43, a material storage plate 44, a third opening 45, a fourth through hole 46, a fourth opening 47, a clamping component 48 and a first slide block 21, the device comprises a fixed rod 22, a fixed plate 23, a sliding telescopic rod 24, a first mounting seat 25, a multi-stage air pressure rod 26, a mounting plate 27, a connecting frame 28, a first sliding groove 29, a first supporting plate 31, a first supporting rod 32, a round cylinder 33, a telescopic unit 34, a first motor 35, a guide rod 61, a fixed block 62, a limiting block 63, a rotating disc 64, a second opening 65, a fixed column 71, a connecting rod 72, a second sliding block 73 and a first spring 74.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to 5, the wafer wet etching system of the present invention includes a reaction chamber 1, wherein the reaction chamber 1 is provided with a feeding gate 11 and a discharging gate 12; the reaction chamber 1 is not an innovative part of the present invention, and is not described herein. The device also comprises a moving module 2, a grabbing module 3, a first reaction tank 13, a second reaction tank 14, a third reaction tank 15 and a storage barrel 4, wherein the first reaction tank 13, the second reaction tank 14 and the third reaction tank 15 are fixedly arranged on the bottom surface of the inner wall of the reaction bin 1; the moving module 2 is fixedly arranged on the top of the side surface of the inner wall of the reaction bin 1; the grabbing module 3 is installed on the moving module 2, and the storage barrel 4 is used for storing the wafer 16; the grabbing module 3 is used for grabbing the material storage cylinder 4; when the device works, the material storage barrel 4 is conveyed into the reaction bin 1 from the feeding door 11; the moving module 2 is matched with the grabbing module 3 to sequentially place the wafers 16 in the storage barrel 4 into the third reaction tank 15, the second reaction tank 14 and the first reaction tank 13 for etching; finally, the wafer 16 in the storage barrel 4 is taken out through the discharge door 12;
the first reaction tank 13 is connected with the second reaction tank 14 through a first electromagnetic valve 17; the second reaction tank 14 is connected with the third reaction tank 15 through a second electromagnetic valve 18; the inner wall of the third reaction tank 15 is provided with a third spray head 51 which is used for spraying the etching liquid in the second reaction tank 14 to the material storage barrel 4 in the third reaction tank 15; the inner wall of the second reaction tank 14 is provided with a second spray head 52 which is used for spraying the etching liquid in the first reaction tank 13 to the material storage barrel 4 in the second reaction tank 14; the second spray head 52 and the third spray head 51 are used for cleaning impurities remained on the surface of the wafer 16, and meanwhile, the utilization rate of the etching liquid is improved; during operation, the first reaction tank 13, the second reaction tank 14 and the third reaction tank 15 are filled with etching liquid with the same purity, and the material storage cylinder 4 is used for performing ultrasonic etching in the third reaction tank 15, the second reaction tank 14 and the first reaction tank 13 in sequence and shaking off bubbles and impurities on the surface of the wafer 16; when the moving module 2 and the grabbing module 3 are matched to lift the material storage barrel 4; the second spray head 52 and the third spray head 51 respectively spray the material storage cylinder 4, and are used for cleaning impurities on the surface of the wafer 16.
The material storage barrel 4 comprises a third barrel body 41, a first support frame 42, a clamping plate 43 and a material storage plate 44; the clamping plate 43 is fixedly arranged on the top surface of the third cylinder 41 through the first supporting frame 42, the clamping plate 43 is annular, and the clamping plate 43 is used for being matched with the grabbing module 3 for use; the material storage plate 44 is arranged on the inner wall of the third cylinder 41, and the material storage plate 44 can be detached from the inner wall of the third cylinder 41; the material storage plate 44 is used for storing the wafer 16; a third opening 45 is formed in the surface of the third cylinder 41; the third opening 45 is used for conveying the etching liquid to the material storage plate 44;
the material storage plate 44 is provided with a fourth through hole 46 and a fourth opening 47; the fourth through hole 46 is used for enabling the etching liquid to pass through the material storage plate 44; the fourth opening 47 is provided with a clamping unit, and the clamping unit is used for clamping the wafer 16; the clamping unit comprises a plurality of clamping components 48, the clamping components 48 act on the side surface of the wafer 16, and the clamping components 48 are used for fixing the wafer 16 on one hand and enabling the surface of the wafer 16 to be fully contacted with the etching liquid on the other hand; the gripping member 48 is a robot, an elastic snap, or the like. The material storage plate 44 is detachably mounted on the inner wall of the third cylinder 41, the wafer 16 is arranged in the material storage barrel 4 through the material storage plate 44, and when the material storage barrel 4 is soaked in the first reaction tank 13, the second reaction tank 14 and the third reaction tank 15, the etching liquid etches the wafer 16 through the third opening 45.
As an embodiment of the invention, the moving module 2 comprises a first sliding block 21, a fixed rod 22, a fixed plate 23, a sliding telescopic rod 24, a first mounting seat 25, a multi-stage pneumatic rod 26, a mounting plate 27 and a connecting frame 28, a first sliding groove 29 is arranged on the inner wall of the top plate of the reaction chamber 1, and the first sliding block 21 is used for sliding in the first sliding groove 29; the top surface of the fixed plate 23 is fixedly connected with the first sliding block 21 through a fixed rod 22; the side surface of the fixing plate 23 is installed on the inner wall of the reaction chamber 1 through a sliding telescopic rod 24; the multistage air pressure rod 26 is fixedly arranged on the bottom surface of the fixing plate 23 through a first mounting seat 25; the bottom end of the multi-stage air pressure rod 26 is fixedly connected with a connecting frame 28 through a mounting plate 27; the connecting frame 28 is used for fixedly connecting the grabbing module 3. The first sliding block 21 moves in the first sliding rail and is controlled by a controller; the moving module 2 is matched with the grabbing module 3 to synchronously move the storage barrels 4 in the third reaction tank 15, the second reaction tank 14 and the first reaction tank 13 to the left by one unit, wherein one unit refers to the distance for the storage barrel 4 in the third reaction tank 15 to move into the second reaction tank 14; then the grabbing module 3 and the moving module 2 are matched to feed the storage barrel 4 closest to the feeding door 11 into the third reaction tank 15; the etching liquid can carry out three-stage etching on the wafer 16 in the storage barrel 4, so that the utilization rate of the etching liquid is improved, and meanwhile, the surface cleanliness of the etched wafer 16 is improved.
As an embodiment of the present invention, the grasping module 3 includes a first supporting plate 31, a first supporting rod 32, a round tube 33, and a telescopic unit 34; the first support plate 31 is fixedly connected with the top surface of the circular cylinder 33 through a second support frame; a telescopic unit 34 is arranged in the round barrel 33, and the telescopic unit 34 is connected with a first motor 35 through a rotating shaft; the telescopic unit 34 is used for grabbing the material storage cylinder 4; when the motor rotates, the length of the telescopic unit 34 changes, and when the length of the telescopic unit 34 is shortened, the telescopic unit 34 is positioned inside the circular cylinder 33 and used for enabling the circular cylinder 33 to penetrate through the clamping plate 43 in the material storage cylinder 4; when the telescopic unit 34 becomes long, a part of the telescopic unit 34 is located outside the circular cylinder 33, which grips the magazine 4 by cooperating with the grip plate 43.
As an embodiment of the present invention, the telescopic unit 34 includes a guide rod 61, a fixed block 62, a limit block 63 and a rotating disc 64, and second openings 65 are uniformly formed in the side wall of the circular cylinder 33 in a circumferential arrangement manner; the fixed block 62 is fixedly arranged on the side wall of the guide rod 61, and the guide rod 61 is positioned in the second opening 65; a spring is arranged between the second opening 65 and the fixed block 62; the rotating disc 64 is fixedly connected with the first motor 35 through a rotating shaft, and the outer wall of the rotating disc 64 is contacted with one end of the guide rod 61; the rotating disc 64 is a cam disc; the limiting block 63 is fixedly installed in the inner wall of the round cylinder 33, and the limiting block 63 is used for limiting the guide rod 61. The cam disc is matched with the guide rod 61 to change the distance of the guide rod 61 extending out of the circular cylinder 33, so that the telescopic unit 34 can fix the storage cylinder 4.
As an embodiment of the present invention, the number of the holding members 48 is six to nine; the clamping component 48 comprises a fixed column 71, a connecting rod 72, a second sliding block 73 and a first spring 74; the side surface of the fixed column 71 is hinged with one end of each of two connecting rods 72, the other end of each connecting rod 72 of the two connecting rods 72 is hinged on a second sliding block 73, and a first spring 74 is fixedly connected between the two connecting rods 72. The clamping components 48 are used for effectively fixing the wafer 16, and the first spring 74 can enable the clamping components 48 to fix wafers 16 with different diameters by matching with the connecting rod 72; the fixing column 71 is in line contact with the side surface of the wafer 16, so that the etching liquid can flow on the surface of the wafer 16, the etching efficiency of the wafer 16 is improved, and impurities on the surface of the wafer 16 can slide off from the surface of the wafer 16, thereby improving the cleanliness of the surface of the wafer 16.
When in use, the reaction solution is sequentially put into the third reaction tank 15, the second reaction tank 14 and the first reaction tank 13 for etching; finally, the wafer 16 in the storage barrel 4 is taken out through the discharge door 12; the second spray head 52 and the third spray head 51 are used for cleaning impurities remained on the surface of the wafer 16, and meanwhile, the utilization rate of the etching liquid is improved; when the device works, the first reaction tank 13, the second reaction tank 14 and the third reaction tank 15 are filled with etching liquid with the same purity; mounting the wafer 16 on the inner wall of the storage barrel 4 through the storage plate 44, and conveying the storage barrel 4 from the feeding door 11 to the reaction bin 1; the moving module 2 is matched with the grabbing module 3 and is used for performing ultrasonic etching on the material storage cylinder 4 in the third reaction tank 15, the second reaction tank 14 and the first reaction tank 13 in sequence; when the moving module 2 and the grabbing module 3 are matched to lift the material storage barrel 4; the second spray head 52 and the third spray head 51 respectively spray the material storage barrel 4;
after working for a period of time, discharging the etching liquid in the third reaction tank 15, then opening the second electromagnetic valve 18, and conveying the etching liquid in the second reaction tank 14 to the third reaction tank 15; closing the second electromagnetic valve 18, opening the first electromagnetic valve 17, and conveying the etching liquid in the first reaction tank 13 to the second reaction tank 14; finally, pure etching liquid is introduced into the first reaction tank 13; the wafer 16 then continues to be etched.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. A wafer wet etching system comprises a reaction bin (1), wherein a feeding door (11) and a discharging door (12) are arranged in the reaction bin (1); the method is characterized in that: the device is characterized by further comprising a moving module (2), a grabbing module (3), a first reaction tank (13), a second reaction tank (14), a third reaction tank (15) and a storage barrel (4), wherein the first reaction tank (13), the second reaction tank (14) and the third reaction tank (15) are fixedly arranged on the bottom surface of the inner wall of the reaction bin (1); the moving module (2) is fixedly arranged on the top of the side surface of the inner wall of the reaction bin (1); the grabbing module (3) is arranged on the moving module (2), and the storage barrel (4) is used for storing wafers (16); the grabbing module (3) is used for grabbing the storage barrel (4);
the first reaction tank (13) is connected with the second reaction tank (14) through a first electromagnetic valve (17); the second reaction tank (14) is connected with the third reaction tank (15) through a second electromagnetic valve (18); the inner wall of the third reaction tank (15) is provided with a third spray head (51) which is used for spraying the etching liquid in the second reaction tank (14) to the material storage barrel (4) in the third reaction tank (15); a second spray head (52) is arranged on the inner wall of the second reaction tank (14) and is used for spraying the etching liquid in the first reaction tank (13) to the material storage barrel (4) in the second reaction tank (14);
the storage barrel (4) comprises a third barrel body (41), a first supporting frame (42), a clamping plate (43) and a storage plate (44); the clamping plate (43) is fixedly arranged on the top surface of the third cylinder (41) through a first supporting frame (42), the clamping plate (43) is annular, and the clamping plate (43) is used for being matched with the grabbing module (3) for use; the storage plate (44) is arranged on the inner wall of the third cylinder (41), and the storage plate (44) can be detached from the inner wall of the third cylinder (41); the storage plate (44) is used for storing the wafer (16); a third opening (45) is formed in the surface of the third cylinder body (41); the third opening (45) is used for conveying the etching liquid to the material storage plate (44);
the material storage plate (44) is provided with a fourth through hole (46) and a fourth opening (47); the fourth through hole (46) is used for enabling etching liquid to penetrate through the material storage plate (44); the fourth opening (47) is provided with a clamping unit, and the clamping unit is used for clamping the wafer (16); the clamping unit includes a plurality of clamping members (48).
2. The wafer wet etching system of claim 1, wherein: the moving module (2) comprises a first sliding block (21), a fixing rod (22), a fixing plate (23), a sliding telescopic rod (24), a first mounting seat (25), a multi-stage air pressure rod (26), a mounting plate (27) and a connecting frame (28), a first sliding groove (29) is formed in the inner wall of a top plate of the reaction bin (1), and the first sliding block (21) is used for sliding in the first sliding groove (29); the top surface of the fixed plate (23) is fixedly connected with the first sliding block (21) through a fixed rod (22); the side surface of the fixed plate (23) is arranged on the inner wall of the reaction bin (1) through a sliding telescopic rod (24); the multistage air pressure rod (26) is fixedly arranged on the bottom surface of the fixing plate (23) through a first mounting seat (25); the bottom end of the multi-stage air pressure rod (26) is fixedly connected with the connecting frame (28) through a mounting plate (27); the connecting frame (28) is used for fixedly connecting the grabbing module (3).
3. The wafer wet etching system of claim 2, wherein: the grabbing module (3) comprises a first supporting plate (31), a first supporting rod (32), a round cylinder (33) and a telescopic unit (34); the first support plate (31) is fixedly connected with the top surface of the round cylinder (33) through a second support frame; a telescopic unit (34) is arranged in the round barrel (33), and the telescopic unit (34) is connected with a first motor (35) through a rotating shaft; the telescopic unit (34) is used for grabbing the storage cylinder (4).
4. The wafer wet etching system of claim 3, wherein: the telescopic unit (34) comprises a guide rod (61), a fixed block (62), a limiting block (63) and a rotating disc (64), and second openings (65) are uniformly formed in the side wall of the round cylinder (33) in a circumferential arrangement mode; the fixing block (62) is fixedly arranged on the side wall of the guide rod (61), and the guide rod (61) is positioned in the second opening (65); a spring is arranged between the second opening (65) and the fixed block (62); the rotating disc (64) is fixedly connected with the first motor (35) through a rotating shaft, and the outer wall of the rotating disc (64) is in contact with one end of the guide rod (61); the rotating disc (64) is a cam disc; the limiting block (63) is fixedly arranged in the inner wall of the round barrel (33), and the limiting block (63) is used for limiting the guide rod (61).
5. The wafer wet etching system of claim 4, wherein: the number of the clamping components (48) is six to nine; the clamping component (48) comprises a fixing column (71), a connecting rod (72), a second sliding block (73) and a first spring (74); the side surface of the fixed column (71) is hinged with one end of each of the two connecting rods (72), the other end of each connecting rod (72) in the two connecting rods (72) is hinged on the second sliding block (73), and a first spring (74) is fixedly connected between the two connecting rods (72).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810491385.4A CN108682639B (en) | 2018-05-21 | 2018-05-21 | Wafer wet etching system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN111472050B (en) * | 2020-04-10 | 2021-08-03 | 陈鸣明 | Special etching equipment for quartz wafer production and use method thereof |
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| CN204179068U (en) * | 2014-11-26 | 2015-02-25 | 乐山新天源太阳能科技有限公司 | For the wet-method etching equipment of silicon chip |
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Effective date of registration: 20200826 Address after: Industrial Park, laobagang Town, Hai'an City, Nantong City, Jiangsu Province Applicant after: JIANGSU MINGXIN MICROELECTRONICS Co.,Ltd. Address before: 214432 Jiangsu Chengjiang Wuxi East Road 99 Jiangyin Jiangyin Changjiang Electronics Industry Co., Ltd. Applicant before: Chen Tao |
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