KR101024357B1 - Fluid supply unit, substrate prcessing apparatus having the same and method of polishing substrate using the same - Google Patents

Abstract

The fluid supply unit has an injecting part, a fixing part and an angle adjusting part. The injection unit includes a nozzle for injecting a fluid, a connection pipe coupled to an input end of the nozzle, a fluid supply line coupled to an input end of the connection pipe, and a tilting control part for adjusting a tilting angle of the connection pipe. The fixing portion secures the jetting part tiltably. One side of the angle control unit is in contact with the tilting control unit, and adjusts the drop angle of the fluid injected from the injection unit according to the contact position with the tilting control unit. In this way, since the drop angle of the fluid is adjusted according to the vertical position of the substrate, the fluid supply unit may inject the fluid to a predetermined position of the substrate. Accordingly, the fluid supply unit can improve the process efficiency of the substrate and the yield of the product.

Description

Fluid supply unit, substrate processing apparatus having same, and substrate processing method using same {FLUID SUPPLY UNIT, SUBSTRATE PRCESSING APPARATUS HAVING THE SAME AND METHOD OF POLISHING SUBSTRATE USING THE SAME}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a semiconductor manufacturing apparatus and method, and more particularly, to a fluid supply unit for polishing and cleaning a semiconductor substrate in a sheet-fed process, a substrate processing apparatus having the same, and a substrate processing method using the same.

In general, a semiconductor device manufacturing process must repeatedly perform a plurality of unit processes such as a deposition process, a photo process, and an etching process to form and stack thin films. These processes are repeated until the desired circuit pattern is formed on the wafer, and after the circuit pattern is formed, a lot of bending occurs on the surface of the wafer. In recent years, as semiconductor devices become highly integrated, their structures are multilayered, and the number of bends on the surface of the wafer and the step between them are increasing. Unplanarization of the wafer surface causes problems such as defocus in the photolithography process, and thus the wafer surface must be polished periodically to planarize the surface of the wafer.

Various surface planarization techniques are used to planarize the surface of the wafer, but among them, a chemical mechanical polishing (CMP) apparatus that can obtain excellent flatness not only for narrow areas but also for wide areas is mainly used. The chemical mechanical polishing apparatus is an apparatus for polishing a surface of a wafer coated with tungsten, an oxide, or the like by mechanical friction and polishing with a chemical abrasive, and enables very fine polishing.

In addition, as semiconductor devices become more dense, highly integrated, and higher in performance, miniaturization of circuit patterns proceeds rapidly, and contaminants such as particles, organic contaminants, and metal contaminants remaining on the substrate surface have a great effect on device characteristics and production yield. Get mad. For this reason, a cleaning process for removing various contaminants adhering to the substrate surface is very important in the semiconductor manufacturing process, and the substrate cleaning process is performed at the front and rear stages of each unit process for semiconductor manufacturing.

It is an object of the present invention to provide a fluid supply unit that can improve process efficiency.

It is also an object of the present invention to provide a substrate processing apparatus having the above fluid supply unit.

It is also an object of the present invention to provide a method of treating a substrate using the fluid supply unit described above.

A fluid supply unit according to one feature for realizing the object of the present invention described above is composed of an injection part, a fixing part and an angle adjusting part.

The injection unit is a nozzle for injecting a fluid, a connector coupled to the input end of the nozzle for providing the fluid to the nozzle, a fluid supply line coupled to the input end of the connector and provides the fluid to the connector, and the connection It is installed in the pipe and has a tilting control unit for adjusting the tilting angle of the connecting pipe, vertical movement is possible. The fixing part fixes the injection part so as to be tiltable. The angle adjusting part faces the fixing part with the injection part interposed therebetween, and one side thereof contacts the tilting adjusting part, and the drop angle of the fluid injected from the injection part according to the contact position in the vertical direction with the tilting adjusting part. Adjust

In addition, the substrate processing apparatus according to one feature for realizing the above object of the present invention comprises a substrate supporting member, a container unit, and a fluid supply unit.

The substrate is seated on the substrate support member. The container unit accommodates the substrate support member, provides a space in which the substrate is processed, and is capable of vertical movement. The fluid supply unit is installed outside the container unit and injects fluid onto the substrate seated on the substrate support member. Specifically, the fluid supply unit has an injection part, a fixing part and an angle adjusting part. The injection unit is a nozzle for injecting a fluid, a connector coupled to the input end of the nozzle for providing the fluid to the nozzle, a fluid supply line coupled to the input end of the connector and provides the fluid to the connector, and the connection It is installed in the pipe and has a tilting control unit for adjusting the tilting angle of the connecting pipe, vertical movement is possible. The fixing part fixes the injection part so as to be tiltable. The angle adjusting part faces the fixing part with the injection part interposed therebetween, and one side thereof contacts the tilting adjusting part, and the drop angle of the fluid injected from the injection part according to the contact position in the vertical direction with the tilting adjusting part. Adjust

Further, the substrate processing method according to one feature for realizing the above object of the present invention is as follows. First, the substrate is placed on the substrate support member accommodated in the container unit. The fluid supply unit provided on one side of the container unit sprays the fluid toward the center of the substrate to clean the substrate. When cleaning the substrate, the nozzle of the fluid supply unit fixed to the outer upper end of the container unit vertically moves with the container unit and injects the fluid while the inclination is automatically adjusted according to the vertical position of the substrate in the container unit. do.

According to the present invention described above, since the drop angle of the fluid is adjusted according to the vertical position of the substrate, the fluid supply unit can inject the fluid to a predetermined position of the substrate. Accordingly, the fluid supply unit can improve the process efficiency of the substrate and the yield of the product.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Hereinafter, the wafer will be described as an example of a semiconductor substrate, but the spirit and scope of the present invention are not limited thereto.

1 is a view schematically showing a sheet type polishing system according to an embodiment of the present invention, and FIG. 2 is a side view illustrating the sheet type polishing system shown in FIG. 1.

1 and 2, the substrate processing system 2000 of the present invention includes a loading / unloading unit 10, an index robot 20, a buffer unit 30, and a main transfer robot. Robot) 50, a plurality of substrate polishing units 1000, and a controller 60.

The loading / unloading unit 10 includes a plurality of load ports 11a, 11b, 11c, and 11d. In this embodiment, the loading / unloading section 11 has four load ports 11a, 11b, 11c, 11d, but the number of load ports 11a, 11b, 11c, 11d is the substrate. It may be increased or decreased depending on the process efficiency and the foot print condition of the processing system 2000.

Front open unified pods (FOUPs) 12a, 12b, 12c, and 12d in which wafers are accommodated are mounted in the load ports 11a, 11b, 11c, and 11d. Each fulcrum 12a, 12b, 12c, 12d is formed with a plurality of slots for accommodating the wafers in a state in which they are arranged horizontally with respect to the ground. The wafers 12a, 12b, 12c, and 12d store wafers processed in each substrate polishing unit 1000 or wafers to be injected into the substrate polishing unit 1000. Hereinafter, for convenience of description, the wafers processed by the substrate polishing units 1000 are called processed wafers, and the wafers not yet processed are called raw wafers.

A first transfer passage 41 is formed between the loading / unloading portion 11 and the buffer portion 30, and a first transfer rail 42 is installed in the first transfer passage 41. The index robot 20 is installed on the first transfer rail 42 and moves wafers between the loading / unloading part 11 and the buffer part 30 while moving along the first transfer rail 42. Transfer. That is, the index robot 20 extracts at least one raw wafer from the unpacks 12a, 12b, 12c, and 12d mounted on the loading / unloading unit 11 and loads the raw wafers into the buffer unit 30. . In addition, the index robot 20 extracts at least one processed wafer from the buffer unit 30 and loads the processed wafers into the pools 12a, 12b, 12c, and 12d seated on the loading / unloading unit 11. .

On the other hand, the buffer unit 30 is installed on one side of the first transfer passage 41. The buffer unit 30 accommodates the raw wafers transferred by the index robot 20 and the processed wafers processed by the substrate polishing units.

The main transfer robot 50 is installed in the second transfer passage 43. The second transfer passage 43 is provided with a second transfer rail 44, and the second transfer rail 44 is provided with the main transfer robot 50. The main transfer robot 50 moves along the second transfer rail 44 to transfer wafers between the buffer unit 30 and the substrate polishing units. That is, the main transfer robot 50 pulls out at least one raw wafer from the buffer unit 30 to provide it to the substrate polishing unit 1000, and the wafer processed by the substrate polishing unit 1000, namely, The processed wafer is loaded into the buffer part 30.

The substrate polishing units are disposed at both sides of the second transfer passage 43, and each substrate polishing unit 1000 polishes and cleans the raw wafer to form the processed wafer. The substrate polishing units are disposed such that at least two substrate polishing units face each other with the second transfer passage 43 therebetween. In one example of the present invention, two substrate grinding portions are disposed in parallel along the second transfer passage 43, respectively, on both sides of the second transfer passage 43 in plan view, The number of substrate polishing units disposed on both sides may increase or decrease depending on the process efficiency and footprint of the substrate polishing system 2000.

In addition, the substrate polishing units may be arranged in multiple layers. In one example of the present invention, the substrate polishing units are stacked in two layers, two in one layer.

That is, the substrate polishing units are composed of eight substrate polishing units, and four substrate polishing units disposed in two layers, two in one layer, are disposed at both sides of the second transfer passage 43, respectively. The number of layers in which the substrate polishing units are stacked, the number of substrate polishing units disposed in each layer, and the number of rows in which the substrate polishing units are continuously arranged in parallel are increased according to the process efficiency and footprint of the substrate polishing system 1000. Or decrease. When the number of rows in which the substrate polishing units are arranged in parallel increases, the number of the second transfer passage 43 and the main transfer robot 50 also increases. In addition, when the number of layers on which the substrate polishing units are stacked increases, the number of the main transfer robots 50 may also increase.

As such, since the substrate polishing portions are disposed in a plurality of layers and a plurality of rows, the substrate polishing system 2000 may simultaneously polish and clean a plurality of wafers. Accordingly, the substrate polishing system 2000 may improve process efficiency and productivity and reduce footprint.

Meanwhile, each substrate polishing unit 1000 is connected to the controller 60, and polishes and cleans the raw wafer under the control of the controller 60. That is, the controller 60 controls the substrate polishing unit 1000 to adjust the polishing amount of the raw wafer by the substrate polishing unit 1000.

Hereinafter, the structure of the substrate polishing unit 1000 will be described in detail with reference to the accompanying drawings.

3 is a perspective view illustrating the substrate polishing apparatus shown in FIG. 1, and FIG. 4 is a partially cut perspective view illustrating the substrate support unit and the processing container illustrated in FIG. 3 in detail.

1, 3, and 4, the substrate polishing system 2000 includes a polishing process for polishing the upper surface of the wafer 70 and a cleaning process for cleaning the surface of the wafer 70 after the polishing process. The substrate polishing unit 1000 may proceed sequentially.

In detail, the substrate polishing unit 1000 may include a substrate support unit 100, a container unit 200, a polishing unit 300, first and second processing liquid supply units 400 and 500, and a brush. Unit 600, aerosol unit 700 and pad conditioning unit 800 may be included.

The substrate support unit 100 is mounted with a wafer 70 transferred from the main transfer robot 50. The substrate support unit 100 supports and fixes the wafer 70 during a polishing process and a cleaning process of the wafer 70. The substrate support unit 100 may include a spin head 110 on which the wafer 70 is seated, and a support 120 supporting the spin head 110. The spin head 110 has a generally circular shape in plan view and gradually decreases in width from an upper surface to a lower surface. In one example of the present invention, the spin head 110 has a size of an upper surface supporting the wafer 70 is smaller than the size of the wafer 70. Therefore, in the side view, the wafer 70 seated on the spin head 110 protrudes outward from the top end of the spin head 110.

The support part 120 is installed below the spin head 110. The support 120 has a generally cylindrical shape, is coupled to the spin head 110, and rotates the spin head 110 during a polishing process and a cleaning process.

The substrate support unit 100 is accommodated in the container unit 200. The container unit 200 includes first and second process bowls 210 and 220, first and second recovery vats 230 and 240, and first and second recovery tubes 251. , 252, and an elevating member 260.

In detail, the first and second processing containers 210 and 220 surround the substrate support unit 100 and provide a process space in which a polishing process and a cleaning process of the wafer 70 are performed. Upper portions of the first and second processing vessels 210 and 220 are respectively opened, and the spin head 110 is exposed through the open upper portions of the first and second processing vessels 210 and 220. In this embodiment, the first and second processing vessels 210 and 220 have a circular ring shape, but the shapes of the first and second processing vessels 210 and 220 are not limited thereto. Can have

In detail, the first processing container 210 may include a sidewall 211, a top plate 212, and a guide part 213. The side wall 211 has a generally circular ring shape and surrounds the substrate support unit 100.

An upper end of the side wall 211 is connected to the top plate 212. The upper plate 212 extends from the side wall 211, and is formed of an inclined surface that is inclined upwardly away from the side wall 211. The top plate 212 has a generally circular ring shape and is spaced apart from the spin head 110 when viewed in plan view and surrounds the spin head 110.

The guide portion 213 includes first and second guide walls 213a and 213b. The first guide wall 213a protrudes from the inner wall of the side wall 211 to face the top plate 212, and is formed of an inclined surface that is inclined downward toward the upper side of the side wall 212 and has a circular ring shape. The second guide wall 213b extends vertically downward from the first guide wall 213a, faces the side wall 211, and has a circular ring shape. The guide part 213 has a treatment liquid scattered to the side surfaces 211 of the first processing container 210 and the inner surfaces of the upper plate 212 during the polishing process of the wafer 70. Guide to flow to the side.

The second processing container 220 is installed outside the first processing container 210. The second processing container 220 surrounds the first processing container 210 and has a size larger than that of the first processing container 210.

In detail, the second processing container 220 may include a sidewall 221 and a top plate 222. The side wall 221 has a generally circular ring shape and surrounds the side wall 211 of the first processing container 210. The side wall 221 is positioned to be spaced apart from the side wall 211 of the first processing container 210 and is connected to the first processing container 210.

An upper end of the side wall 221 is connected to the top plate 222. The upper plate 222 extends from the side wall 221 and is formed of an inclined surface that is inclined upwardly away from the side wall 221. The top plate 222 has a generally circular ring shape and is spaced apart from the spin head 110 when viewed in plan view and surrounds the spin head 110. The top plate 222 faces the top plate 211 of the first processing container 210 on the top plate 211 of the first processing container 210, and the top plate 211 of the first processing container 210. Are spaced apart from

Under the first and second processing containers 210 and 220, the first and second recovery containers 230 and 240 for recovering the processing liquids used in the polishing process and the cleaning process are installed. The first and second recovery containers 230 and 240 have a generally circular ring shape and an upper portion thereof is opened. In this embodiment, the first and second recovery container 230 and 240 have a circular ring shape, but the shape of the first and second recovery container 230 and 240 is not limited thereto, and may be variously formed. Can be.

The first recovery container 230 is installed below the first processing container 210 to recover the processing liquid used in the polishing process. The second collection container 240 is installed under the second processing container 220 to recover the processing liquid used in the cleaning process.

In detail, the first recovery container 230 may include a bottom plate 231, a first sidewall 232, a second sidewall 233, and a connection part 234. The bottom plate 231 has a generally circular ring shape and surrounds the support 220. In one example of the present invention, the bottom plate 231 has a longitudinal section 'V' shape to facilitate the discharge of the treatment liquid recovered in the first recovery container 230. As a result, a ring-shaped recovery passage 231a is formed in the bottom plate 231, and the discharge and recovery of the treatment liquid are easy.

The first sidewall 232 extends vertically from the bottom plate 231 to form a first recovery space RS1 for recovering the treatment liquid. The second sidewall 233 is spaced apart from the first sidewall 232 to face the first sidewall 232. The connecting portion 234 is connected to an upper end of the first side wall 232 and an upper end of the second side wall 233, and an inclined surface inclined upward toward the second side wall 233 from the first side wall 232. Is done. The connection part 234 guides the treatment liquid that is out of the first recovery space RS1 to the first recovery space RS1 so that the processing liquid flows into the first recovery space RS1.

The second recovery container 240 is installed outside the first recovery container 230. The second recovery container 240 surrounds the first recovery container 230 and is spaced apart from the first recovery container 230. In detail, the second recovery container 240 may include a bottom plate 241, a first sidewall 242, and a second sidewall 243. The bottom plate 241 has a generally circular ring shape, and surrounds the bottom plate 231 of the first recovery container 230. In one example of the present invention, the bottom plate 241 has a longitudinal section 'V' shape to facilitate the discharge of the treatment liquid recovered in the second recovery container 240. As a result, a ring-shaped recovery passage 241a is formed in the bottom plate 241, and the discharge and recovery of the processing liquid are easy.

The first and second sidewalls 242 and 243 extend vertically from the bottom plate 241 to form a second recovery space RS2 for recovering the treatment liquid, and have a circular ring shape. The first sidewall 242 is positioned between the first sidewall 232 and the second sidewall 233 of the first recovery container 230, and the first sidewall 232 of the first recovery container 230. Surround). The second sidewall 243 of the second recovery container 240 faces the first sidewall 242 with the bottom plate 241 interposed therebetween, and surrounds the first sidewall 242. The second sidewall 243 of the second recovery container 240 surrounds the second sidewall 233 of the first recovery container 230, and has an upper end sidewall 222 of the second processing container 220. Located outside.

During the polishing and cleaning process of the wafer 70, a vertical position between the spin head 110 and the first and second processing containers 210 and 220 is changed according to each process, and the first and second recovery times are changed. The barrels 230 and 240 recover the treatment liquid used in different processes.

Specifically, during the polishing process, the spin head 110 is disposed in the first processing container 210, and the polishing process of the wafer 70 is performed in the first processing container 210. The wafer 70 is rotated by the rotation of the spin head 110 during the polishing process. Accordingly, the processing liquid sprayed on the wafer 70 during the polishing process is scattered toward the inner surface of the side wall 211 and the upper plate 212 of the first processing container 210 by the rotational force of the wafer 70. . The processing liquid buried in the side walls 211 of the first processing container 210 and the inner surfaces of the upper plate 212 flows along the top plate 212 and the side walls 211 of the first processing container 210 in the direction of gravity. The guide part 213 is reached and flows along the inner surface of the guide part 213 in the direction of gravity to be collected in the first recovery container 230.

During the cleaning process after the polishing process, the spin head 110 is disposed below the top plate 222 of the second processing container 220 at the top of the first processing container 210 and rotates during the cleaning process. . Accordingly, the processing liquid provided to the wafer in the cleaning process is scattered to the inner surface of the upper plate 222 and the inner surface of the side wall 221 of the second processing container 220 and to the outer surface of the first processing container 210. The side wall 211 of the first processing container 210 is positioned above the bottom plate 241 of the second recovery container 240, and the processing liquid buried on the outer surface of the first processing container 210 is formed of the first processing container 210. 1 It flows along the outer surface of the processing container 210 to the gravity direction, and is recovered by the said 2nd collection container 240. In addition, the processing liquid buried on the inner surface of the second processing container 220 flows in the direction of gravity along the inner surface of the second processing container 220 and is recovered in the second collecting container.

As described above, the first recovery container 230 recovers the processing liquid used in the polishing process, and the second recovery container 240 recovers the processing liquid used in the cleaning process. Accordingly, the container unit 200 can separate and recover the processing liquid in each process step made in the container unit 200, so that the processing liquid can be reused, and the processing liquid can be easily recovered.

The first recovery container 230 is connected to the first recovery pipe 251, and the second recovery container 240 is connected to the second recovery pipe 252. The first recovery pipe 251 is coupled to the bottom plate 231 of the first recovery container 230, the first recovery pipe 251 on the bottom plate 231 of the first recovery container 230. The first recovery hole 231b is formed to communicate with. The treatment liquid recovered in the first recovery space RS1 of the first recovery container 230 is discharged to the outside through the first recovery pipe 251 via the first recovery hole 231b.

In this embodiment, the container unit 200 includes two processing vessels 210 and 220 and two collecting vessels 230 and 240, but the processing vessels 210 and 220 and the collecting vessel 230. , 240) may increase depending on the number of kinds of treatment liquids used in the polishing and washing processes and the number of kinds of treatment liquids to be separated and recovered.

The second recovery pipe 252 is coupled to the bottom plate 241 of the second recovery container 240, the second recovery pipe 252 on the bottom plate 241 of the second recovery container 240. The second recovery hole 241b is formed in communication with. The treatment liquid recovered in the second recovery space RS2 of the second recovery container 240 is discharged to the outside through the second recovery pipe 252 via the second recovery hole 241b.

In this embodiment, each of the first and second recovery pipes 251 and 252 is provided, but the number of the first and second recovery pipes 251 and 252 is the first and second recovery pipes 251 and 252. It may increase depending on the size and recovery efficiency of the second recovery container (230, 240).

On the other hand, the lifting member 260 that is vertically movable is provided on the outside of the second processing container 220. The elevating member 260 is coupled to the side wall 221 of the second processing container 220, and adjusts vertical positions of the first and second processing containers 210 and 220. In detail, the lifting member 260 may include a bracket 261, a moving shaft 262, and a driver 263. The bracket 261 is fixed to the outer wall 221 of the second processing container 220 and is coupled to the moving shaft 262. The moving shaft 262 is connected to the driver 263 and is moved in the vertical direction by the driver 263.

The elevating member 260 may include the first and second processing containers 210 and 220 when the wafer 70 is seated on the spin head 110 or lifted from the spin head 110. The first and second processing vessels 210 and 220 are lowered to protrude to the upper portion of the first and second processing vessels 210 and 220. When descending, the first and second sidewalls 232 and 233 and the connection portion 234 of the first recovery container 230 are connected to the sidewall 211 and the first and second guide walls of the first processing container 210. It is drawn into the space formed by 213a and 213b.

In addition, the elevating member 260 may process the first and second treatments to separate and recover the processing liquid used in the polishing process and the processing liquid used in the cleaning process during the polishing process and the cleaning process of the wafer 10. Lifting and lowering the vessels 210 and 220 adjusts the relative vertical position between each of the treatment vessels 210 and 220 and the spin head 110.

In this embodiment, the substrate polishing unit 1000 vertically moves the first and second processing vessels 210 and 220 so as to first and second processing vessels 210 and 220 and the spin head 110. The relative vertical position of the liver may be changed, but the relative vertical position between the first and second processing vessels 210 and 220 and the spin head 110 may be changed by vertically moving the spin head 110.

On the other hand, the outer side of the container unit 200, the polishing unit 300, the first and second processing fluid supply unit 400, 500, the brush unit 600, the aerosol unit 700, and the pad The conditioning unit 800 is installed.

The polishing unit 300 polishes the surface of the wafer 70 fixed to the substrate support unit 100 by a chemical mechanical method to planarize the surface of the wafer 70.

Hereinafter, the configuration of the polishing unit 300 will be described in detail with reference to the drawings.

FIG. 5 is a perspective view showing the polishing unit shown in FIG. 4, a partially cutaway side view showing the polishing unit shown in FIG. 5, and FIG. 7 is a longitudinal cross-sectional view showing the polishing unit shown in FIG. 5.

5 to 7, the polishing unit 300 may include a pressing part 310, a fluid supply part 320, a swing part 330, and a driving part 340.

Specifically, the pressing unit 310 is disposed on the wafer 70 fixed to the spin head 110 during the polishing process. The pressing unit 310 rotates in contact with the wafer 70 while spraying a chemical liquid for polishing the wafer 70 to polish the wafer 70. The fluid supply part 320 is provided above the pressing part 310. The fluid supply unit 320 provides the chemical liquid to the pressing unit 310, and receives the rotational force from the driving unit 340 through the rotating unit 330 to rotate together with the pressing unit 310. Detailed description of the configuration of the pressing unit 310 and the fluid supply unit 320 will be described later in FIG.

The rotating part 330 is installed above the fluid supply part 320. The rotating part 330 may include a rod-shaped rotating case 331 and a belt-pull assembly 335 which transmits the rotational force from the driving part 340 to the fluid supply part 320. One side of the rotary case 331 is coupled to the fluid supply unit 320, the other side is coupled to the drive unit 340.

The driving unit 340 adjusts vertical positions of the first driving motor 341 for rotating the rotating unit 330, the second driving motor 342 for rotating the fluid supply unit 320, and the pressing unit 310. It may include a vertical moving unit 343.

The first driving motor 341 is coupled to the rotation case 331, and provides a rotational force to the rotation case 331. The first driving motor 341 may alternately and repeatedly provide a rotational force in a clockwise direction and a rotational force in a counterclockwise direction. Accordingly, the rotating part 330 swings by the driving part 340 with a portion coupled to the driving part 340 as a central axis. During the polishing process, the pressing unit 310 may horizontally reciprocate in an arc shape on the upper portion of the wafer 70 by the swinging operation of the rotating unit 330.

The second driving motor 342 is installed under the first driving motor 341. The second drive motor 342 provides a rotational force to the belt-pulley assembly 335, and the belt-pulley assembly 335 transmits the rotational force of the second drive motor 342 to the fluid supply unit 320. to provide. The belt-pulley assembly 335 may be embedded in the rotation case 331 and include a driving pulley 332, a driven pulley 333, and a belt 334. The driving pulley 332 is installed on an upper portion of the first driving motor 341, and is coupled to one side of the vertical arm 344 passing through the first driving motor 341. The second driving motor 342 is coupled to the other side of the vertical arm 344.

The driven pulley 333 is disposed to face the driving pulley 332 and is installed on the fluid supply part 320 to be coupled to the fluid supply part 320. The driving pulley 332 and the driven pulley 333 are connected to each other through the belt 334, and the belt 334 is wound around the driving pulley 332 and the driven pulley 333.

The rotational force of the second drive motor 342 is transmitted to the drive pulley 332 through the vertical arm 344, whereby the drive pulley 332 rotates. The rotational force of the driving pulley 332 is transmitted to the driven pulley 333 through the belt 334, and thus, the driven pulley 333 rotates. The rotational force of the driven pulley 333 is transmitted to the fluid supply part 320, and thus, the pressing part 310 and the fluid supply part 320 rotate.

The vertical moving part 343 is installed behind the first driving motor 341 and the second driving motor 342. The vertical moving part 343 may include a ball screw 343a, a nut 343b, and a third drive motor 343c. The ball screw 343a has a rod shape and is installed perpendicular to the ground. The nut 343b is fitted to the ball screw 343a and is fixed to the second drive motor 342. The third driving motor 343c is installed under the ball screw 343a. The third driving motor 343c may be coupled to the ball screw 343a and may provide a clockwise rotational force and a counterclockwise rotational force to the ballstream 343a. The ball screw 343a is rotated clockwise or counterclockwise by the third drive motor 343c. The nut 343b moves up and down along the ball screw 343a by the rotation of the ball screw 343a. Accordingly, the second driving motor 342 coupled to the nut 343b is connected to the nut (343b). 343b) to move up and down. The first driving motor 341 and the rotating part 330 are moved up and down by the vertical movement of the second driving motor 342, so that the fluid supply part 320 and the pressing part 310 are also moved up and down. do.

In this embodiment, the vertical moving part 343 is provided with a ball screw 343a, a nut 343b and a third drive motor 343c to provide vertical movement force in a linear motor manner, but with a cylinder It may also provide vertical movement force.

The swing driver 341, the spin driver 342, the ball screw 343a, the nut 343b, and the vertical arm 344 are embedded in the drive case 345. The drive case 345 has a long rod shape in the vertical direction, and is installed outside the container unit 200 (see FIG. 4).

Meanwhile, the pressing unit 310 and the fluid supply unit 320 are coupled to one end of the rotating unit 330 and swing by the rotation of the rotating unit 330. Accordingly, the pressurizing part 310 and the fluid supply part 320 are disposed outside the container unit 200 (see FIG. 4) during the waiting time, and the swinging part of the rotating part 330 is moved by the swinging operation of the rotating part 330 during the polishing process. It is moved into the container unit 200.

Hereinafter, the pressurizing part 310 and the fluid supply part 320 will be described in detail with reference to the accompanying drawings.

8 is a perspective view illustrating in detail the pressurizing unit and the fluid supply unit shown in FIG. 5.

7 and 8, the fluid supply unit 320 provides a chemical liquid for polishing a wafer to the pressing unit 310, and rotates by the rotational force provided from the driving unit 340 to press the pressing unit 310. Rotate).

In detail, the fluid supply part 320 includes a housing 321, a rotation shaft 322, first and second bearings 323a and 323b, a fixed shaft 324, and first and second chemical tubes 326a and 326b. , An air injection pipe 327, and first and second rotary lip seals 328a and 328b.

The housing 321 has a generally cylindrical tubular shape, and an upper end is inserted into the rotating case 331 of the rotating part 330 to be coupled to the rotating case 331, and a lower end thereof is coupled to the pressing part 310. do.

The rotating shaft 322 is provided in the housing 321 and is spaced apart from the housing 321. The rotating shaft 322 is formed of a hollow tube extending in the longitudinal direction of the housing 321. The upper end of the rotating shaft 322 is inserted into the driven pulley 333 of the rotating part 330 to engage with the driven pulley 333, the rotating shaft 322 is rotated by the rotation of the driven pulley 333. . The lower end of the rotating shaft 322 is coupled to the pressing portion 310, the pressing portion 310 is rotated by the rotation of the rotating shaft 322. That is, the rotational force of the second drive motor 342 (see Fig. 6) is the vertical arm 344 (see Fig. 8)-> drive pulley 332-> belt 334-> driven pulley 333-> The rotary shaft 322 is transferred in order of the pressing unit 310 so that the pressing unit 310 rotates based on the center of gravity.

The first and second bearings 323a and 323b are interposed between the housing 321 and the rotation shaft 322. The first and second bearings 323a and 323b connect the housing 321 and the rotation shaft 322 and support the rotation shaft 322 so that the rotation shaft 322 rotates stably. The first bearing 323a is located adjacent to the rotating part 330, and the second bearing 323b is located adjacent to the pressing part 310. The inner rings of the first and second bearings 323a and 323b are fitted to the rotation shaft 322 to rotate together with the rotation shaft 322, and the outer rings are coupled to the housing 321 to rotate when the rotation shaft 322 is rotated. I never do that. Therefore, only the rotation shaft 322 rotates, and the housing 321 does not rotate.

The fixed shaft 324 is installed in the rotation shaft 322. The fixed shaft 324 is made of a hollow tube extending in the same direction as the rotating shaft 332. The fixed shaft 324 is spaced apart from the rotating shaft 322 and does not rotate when the rotating shaft 332 rotates. The upper end of the fixed shaft 324 is inserted into the rotary case 331, coupled to the first shaft bracket 325a fixed to the rotary case 331 so that the fixed shaft 324 is the rotary case 331 It is fixed to). The lower end of the fixed shaft 324 is inserted into the pressing portion 310, and is coupled to the second shaft bracket 325b installed in the pressing portion 310 so that the fixed shaft 324 is the pressing portion 310 Is fixed to.

The first and second chemical liquid tubes 326a and 326b are installed in the fixed shaft 324. The first and second chemical liquid tubes 326a and 326b extend in the same direction as the fixed shaft 324 in the fixed shaft 324 and are disposed in parallel to each other. The first and second chemical liquid tubes 326a and 326b provide a transfer flow path of the chemical liquid used in the polishing process, and an output end for discharging the chemical liquid is located in the pressing unit 310.

An input end of the first chemical tube 326a is connected to a first chemical supply line 83a, and the first chemical supply line 83a supplies a first chemical solution CL1 used to polish a wafer. It is connected to the chemical liquid supply part 81. The first chemical liquid tube 326a receives the first chemical liquid CL1 from the first chemical liquid supply part 81 through the first chemical liquid supply line 83a.

An input end of the second chemical tube 326b is connected to a second chemical liquid supply line 83b, and the second chemical liquid supply line 83b supplies a second chemical liquid CL2 used to polish the wafer. It is connected to the chemical liquid supply part 82. The second chemical liquid tube 326b receives the second chemical liquid CL2 from the second chemical liquid supply part 82 through the second chemical liquid supply line 83b.

In this embodiment, the first and second chemical liquids CL1 and CL2 may be different kinds of chemical liquids, or may be the same chemical liquid. Examples of the chemical liquids CL1 and CL2 discharged from the first and second chemical liquid tubes 326a and 326b include a slurry for polishing a wafer.

In an example of the present invention, the first and second chemical liquid tubes 326a and 326b are connected to the first and second chemical liquid supply lines 83a and 83b respectively installed through the rotating case 331.

On the other hand, the air injection pipe 327 is installed on the upper end of the housing 321. The air injection pipe 327 is connected to the pad pressure control unit 900, and receives air from the pad pressure control unit 900. In one example of the present invention, the air injection pipe 327 is located inside the rotary case 331.

The air injection pipe 327 communicates with the first air flow path AFP1 formed in the housing 321, and the air injected into the air injection pipe 327 flows into the first air flow path AFP1. The first air flow path AFP1 is formed inside the wall of the housing 321 and extends along the longitudinal direction of the housing 321 from an upper end of the housing 321. An output end of the first air flow path AFP1 communicates with a second air flow path AFP2 formed between the housing 321 and the rotation shaft 322, and the air provided to the first air flow path AFP1 is formed in the first air flow path AFP1. 2 flows into the air flow path AFP2.

The second air flow path AFP2 is defined by the first and second rotary lip seals 328a and 328b. The first and second rotary lip seals 328a and 328b are interposed between the housing 321 and the rotation shaft 322 and seal a space between the housing 321 and the rotation shaft 322. The first and second rotary lip seals 328a and 328b face each other and have a ring shape. The first rotary lip seal 328a is positioned below the first bearing 323a and adjacent to the first bearing 323a. The second rotary lip seal 328b is installed below the first rotary lip seal 328a and is spaced apart from the first rotary lip seal 328a. A space in which the first rotary lip seal 328a and the second rotary lip seal 328b are spaced apart from each other is provided to the second air flow path AFP2, and the second air flow path AFP2 moves the rotation shaft 322. Surround.

The second air flow path AFP2 communicates with a third air flow path AFP3 formed in the wall of the rotation shaft 322, and the air provided to the second air flow path AFP2 is connected to the third air flow path AFP3. Inflow. The third air flow path AFP3 extends from a point connected with the second air flow path AFP2 in the longitudinal direction of the rotation shaft 322 to a lower end of the rotation shaft 322. The air injected from the pad pressure controller 900 passes through the air inlet tube 327-> first air flow path AFP1-> second air flow path AFP2-> third air flow path AFP3. By the pressing unit 310 is provided.

The pressing unit 310 is installed below the fluid supply unit 320, and the pressing unit 310 rotates while pressing the surface of the wafer to polish the surface of the wafer. In the polishing process, the pressure at which the pressing unit 310 pressurizes the wafer is controlled by the pressure of air introduced into the pressing unit 310 through the third air flow path AFP3.

The pressing unit 310 may include a polishing pad 311, a polishing body 312, a pad holder 313, a clamp member 314, a coupling plate 315, a bellows 316, a cover 317, and a chemical nozzle ( 318).

The polishing pad 311 has a plate shape and has a generally circular ring shape. The polishing pad 311 is rotated while the lower surface is in contact with the upper surface of the wafer during the polishing process to polish the wafer. The polishing pad 311 has a diameter smaller than the diameter of the wafer, and polishes the wafer while swinging by the driving unit 340 during the polishing process. As such, since the polishing pad 311 has a smaller size than the wafer, the polishing unit 300 may locally polish the wafer and prevent over-polishing in a specific region.

The polishing body 312 is provided on the polishing pad 311. The polishing body 312 has a generally circular ring shape and is coupled to the fixed shaft 324 of the fluid supply part 320. Specifically, the polishing body 312 may include a polishing housing 312a, a lower plate 312b and an upper plate 312c.

The polishing housing 312a has a generally cylindrical shape, and the lower plate 312b is installed at a lower portion thereof. The lower plate 312b has a generally circular ring shape and has the same size as the polishing pad 311. The lower plate 312b is coupled to the lower portion of the polishing housing 312a to seal the lower portion of the polishing housing 312a.

The polishing pad 311 is installed below the lower plate 312b. The pad holder 313 is interposed between the polishing pad 311 and the lower plate 312b. The pad holder 313 detachably fixes the polishing pad 311 to the polishing body 312. That is, the bottom surface of the pad holder 313 is coupled to the top surface of the polishing pad 311, and the top surface is detachably coupled to the lower plate 312b by the clamp member 314.

The clamp member 314 is interposed between the lower plate 312b and the pad holder 313 to securely couple the pad holder 313 to the lower plate 312b using a magnetic force. Specifically, the clamp member 314 includes a magnet 314a, a clamp plate 314b, and a screw 314c. The magnet 314a is interposed between the clamp plate 314b and the lower plate 312b and has a generally circular ring shape. In one example of the present invention, the clamp member 314 includes one magnet 314a having a ring shape, but the number of the magnets 314ba is equal to the size of the clamp member 314 and the magnet 314a. The size of the magnet 314a may be changed in various forms. The clamp plate 314b faces the lower plate 312b and is coupled to the lower plate 312b using the screw 314c. Since the clamp plate 314b is made of a metal material having no magnetic material, for example, aluminum, it does not react to the magnet 312a. The clamp plate 314, whereas the pad holder 313 is made of a material having a magnetic material, such as stainless steel or carbon steel, the lower plate by the magnetic force of the magnet 312a Coupled to 312b.

As described above, since the clamp member 314 fixes the pad holder 313 to the lower plate 312b by using magnetic force, it is easy to attach or detach the pad holder 313 to the lower plate 312b. . In particular, since the polishing pad 311 is a consumable, periodic replacement is necessary. Therefore, the process of fixing the pad holder 313 to the lower plate 312b and the process of separating from the lower plate 312b frequently occur. Since the pressing unit 310 is coupled to the pad holder 313 and the lower plate 312b by the magnetic force of the clamp member 314, it is possible to shorten the time required to replace the polishing pad 311. have. Accordingly, the pressing unit 310 may shorten the process waiting time and improve productivity.

In one example of the present invention, the clamp plate 314b is formed with an insertion groove into which the magnet 314a is partially inserted into a portion where the magnet 314a is disposed. In addition, an insertion groove into which the magnet 314a and the clamp plate 314b are inserted is formed at a portion of the lower plate 312b to which the flange member 314 is coupled.

Although only one clamp member 314 is illustrated in FIG. 7, the pad holder 3130 may be coupled to the lower plate 312b by using a plurality of clamp members 314.

On the other hand, the lower plate 312b is coupled to the upper plate 312c. The upper plate 312c is disposed above the lower plate 312b and disposed to face the lower plate 312b. The upper plate 312c is installed in the polishing housing 312a to seal an upper portion of the polishing housing 312b and has a generally circular ring shape.

The upper plate 312c is fixedly coupled to the coupling plate 315 provided on the upper surface. The coupling plate 351 is coupled to the rotation shaft 322 of the fluid supply unit 320 and rotates together with the rotation shaft 322. Accordingly, the entire pressing unit 310 is rotated. The coupling plate 351 has a generally circular plate shape and has a fourth air flow path AFP through which air discharged from the rotation shaft 322 flows. The fourth air flow path AFP communicates with the third air flow path AFP3 of the rotation shaft 322, and air is introduced through the third air flow path AFP3. Air introduced into the fourth air flow path APF4 is injected into the bellows 316.

The bellows 316 is installed in a space in which the lower plate 312b and the upper plate 312c are spaced apart from each other in the polishing housing 312a and are made of a metal material. The bellows 316 is stretchable in the vertical direction by the pressure of air provided from the fourth air flow path AFP4. The bellows 316 may be elongated so that the polishing pad 311 closely adheres to the wafer during the polishing process. When the polishing process is performed while the polishing pad 311 is closely adhered to the wafer, the polishing of the wafer is uniformly efficient. It can proceed to.

Looking at the state of the bellows 316 during the process standby and polishing process, respectively.

First, in the air, the bellows 316 is contracted by the vacuum pressure provided from the pad pressure adjusting unit 900. Accordingly, the lower plate 312b moves toward the upper plate 312c, and the polishing pad 311 is spaced apart from the wafer 70. The upper plate 312c is provided with an internal stopper 312d for adjusting the contraction degree of the bellows 316. The inner stopper 312d protrudes from the lower surface of the upper plate 312c and contacts the lower plate 312b when the bellows 316 contracts. The stopper 312d prevents the lower plate 312b from moving upwards by more than an appropriate distance when the bellows 316 is contracted so that the gap between the lower plate 312b and the upper plate 312c is less than or equal to an appropriate interval. Prevent narrowing.

In the polishing process, air is injected into the air injection pipe 327 from the pad pressure adjusting unit 900, and the air injected into the air injection pipe 327 passes through the first to fourth air flow paths AFP1 and AFP2. , AFP3, AFP4 are sequentially injected to the bellows 316 via. The bellows 316 is relaxed by the pressure of the injected air, thereby increasing the length BD1 when the length BD2 of the bellows 316 contracts. The polishing pad 311 is brought into contact with the wafer by the relaxation of the bellows 316, and the pressing part 310 of the polishing pad 311 is in contact with the wafer. The wafer is polished by rotating about a central axis.

As described above, since the polishing pad 311 pressurizes the wafer 10 by the bellows 316, the polishing pad 311 may be tilted according to the surface state of the wafer during the polishing process.

The pressure for pressing the wafer 70 is adjusted according to the pressure of the air injected into the bellows 316 of the polishing pad 311. The air pressure of the bellows 316 is adjusted by the pad pressure adjusting unit 900, and the process of adjusting the air pressure will be described later in the description of the configuration of the pad pressure adjusting unit 900.

On the other hand, the cover 317 is installed on the upper portion of the polishing body 312 to cover the upper portion of the polishing body 312. The cover 317 is coupled to the upper end of the polishing housing 312a, and a space for accommodating the coupling plate 315 is provided therein. An opening 317a is formed in the central portion of the cover 317, and a portion of the coupling plate 315 protrudes outwardly through the opening 317a to engage with the rotation shaft 322. The surface defining the opening 317a is spaced apart from the coupling plate 315 inserted into the opening 317a for tilting the polishing pad 311.

Lower ends of the fixed shaft 324 and the first and second chemical tubes 326a and 326b are inserted into holes formed in the central portions of the coupling plate 317, the upper plate 312c and the lower plate 312b, respectively. do. The second shaft bracket 325b is interposed between the upper plate 312c and the fixed shaft 324. The second shaft bracket 325b is coupled to the upper plate 312c and fixedly coupled to the lower end of the fixed shaft 324 to fix the fixed shaft 324 to the upper plate 312c. The second shaft bracket 325b is coupled to the upper plate 312c by using a bearing (not shown), whereby the upper plate 312c is rotatably coupled to the second shaft bracket 325b. do.

The fixed shaft 324 and the first and second chemical liquid tubes 326a and 326b inserted into the pressing unit 310 are coupled to the chemical liquid nozzle 318. The chemical liquid nozzle 318 is inserted into a hole formed in the center of the pad holder 313 and is coupled to the pad holder 313. The input end of the chemical liquid nozzle 318 is coupled to the fixed shaft 324 and the first and second chemical liquid tubes 326a and 326b, and communicates with the output ends of the first and second chemical liquid tubes 326a and 326b. do. The output end of the chemical nozzle 318 is exposed to the outside through the pad hole 311a formed at the center of the polishing pad 311, and is provided from the first and second chemical tube 326a, 326b during the polishing process. The first and second chemical liquids CL1 and CL2 are injected onto the wafer 70. In one embodiment of the present invention, the chemical liquid nozzle 318 is a flow path through which the first chemical liquid CL1 provided from the first chemical liquid tube 326a flows and the second chemical liquid CL2 provided from the second chemical liquid tube 326b. These flow paths are formed separately from each other.

In the polishing process, the fixed shaft 324, the first and second chemical tubes 326a and 326b, and the chemical nozzle 318 do not rotate, and the polishing pad 311 and the pad holder 313 Rotate As described above, since the pad holder 313 rotates while the chemical liquid nozzle 318 is fixed, the chemical liquids CL1 and CL2 ejected from the chemical liquid nozzle 318 are separated from the pad holder 313 and the chemical liquid nozzle. It can be introduced into the gap between 318 to generate foreign matter. Since the foreign matter generated between the pad holder 313 and the chemical nozzle 318 may fall on the wafer 70 during the polishing process, it may cause poor polishing and contamination of the wafer 70.

In order to prevent this, the pressing unit 310 may further include an O-ring 319 interposed between the chemical nozzle 318 and the pad holder 313. The O-ring 319 surrounds the chemical liquid nozzle 318 and prevents the chemical liquids CL1 and CL2 injected from the chemical liquid nozzle 318 from flowing into the pressurizing part 310. Since the O-ring 319 is prone to wear due to the friction caused by the rotation of the pad holder 313, it should be replaced periodically. Replacement of the O-ring 319 may be performed together with the replacement of the polishing pad 311.

5 and 7 again, the pressure at which the polishing unit 300 pressurizes the wafer is controlled by the pad pressure adjusting unit 900. The pad pressure regulator 900 may include an air provider 910, a main line 920, a regulator 930, an electro-pneumatic regulator 940, a first valve 950, and a pressure gauge. 960, a vacuum member 970, a sub line 980, and a second valve 990.

In detail, the air providing unit 910 discharges air to be provided to the bellows 316 of the pressing unit 310 to the main line 920. The main line 920 has an input terminal connected to the air supply unit 910 and an output terminal connected to the air injection pipe 327. The main line 920 provides air injected from the air supply unit 910 to the air injection pipe 327 during the polishing process. Accordingly, the bellows 316 is relaxed. In addition, the main line 920 provides a vacuum pressure supplied from the vacuum member 970 to the air inlet tube 327 when the polishing unit 300 is in standby. Accordingly, the bellows 316 is contracted.

The regulator 930, the electric regulator 940, the first valve 950, and the pressure gauge 960 are sequentially installed on the main line 920. The regulator 930 reduces the pressure of the air provided from the air supply unit 910 to the main line 920 to an appropriate pressure. The air decompressed by the regulator 930 moves to the electric regulator 940. The electric regulator 940 automatically adjusts the pressure of the air decompressed by the regulator 930 to a preset pressure during the polishing process. The air in the main line 920 moves to the first valve 950 via the electro-pneumatic regulator 940. The first valve 950 supplies and blocks air injected into the main line 920 to the air injection pipe 327 through an on / off operation. The pressure gauge 960 is installed between the first valve 950 and the air injection pipe 327 to measure the final pressure of air provided to the air injection pipe 327.

The pad pressure adjusting unit 900 controls the final pressure of the air provided to the air injection pipe 327 to adjust the pressure of the polishing unit 300 to pressurize the wafer. That is, the polishing unit 300 is the pressure of the air injected into the bellows 316 according to the final pressure of the air provided from the pad pressure control unit 900 is adjusted, the bellows 316 of the internal air The degree of relaxation depends on the pressure. That is, the higher the pressure of the air injected into the bellows 316, the more the bellows 316 is relaxed, and accordingly, the pressure at which the polishing pad 311 pressurizes the wafer increases. On the other hand, the lower the pressure of the air injected into the bellows 316, the less the bellows 316 is relaxed, and thus, the pressure at which the polishing pad 311 pressurizes the wafer decreases.

In particular, the pad pressure adjusting unit 900 adjusts the final pressure of the air according to the horizontal position of the polishing pad 311 on the wafer during the polishing process. That is, the electric regulator 940 is electrically connected to the controller 60, and the controller 60 controls the electric regulator 940 so that the final pressure of the air is the polishing pad 311 on the wafer. According to the horizontal position of), adjust it to be equal to the reference pressure set corresponding to the position. The controller 60 divides the wafer into a plurality of adjustment sections, and sets an appropriate reference pressure for each adjustment section.

As described above, the pad pressure controller 900 adjusts the final pressure of the discharged air by the controller 60 for each adjustment section of the wafer. As a result, the pressure at which the polishing pad 311 pressurizes the wafer is adjusted for each adjustment section of the wafer. Accordingly, the polishing unit 300 may prevent over-polishing in a specific region of the wafer and uniformly polish the wafer.

In addition, the controller 60 may be electrically connected to the pressure gauge 960. The pressure gauge outputs the final air pressure value of the main line 920 and provides it to the controller 60. The controller 60 may be configured based on a pressure value currently measured by the pressure gauge 900 and a reference pressure value corresponding to a point at which the polishing pad 311 is currently positioned on the wafer when the final pressure of the air is adjusted. The pressure of the polishing pad 311 is adjusted to be equal to the reference pressure.

As such, the control unit 60 adjusts the final pneumatic pressure of the main line 920 based on the pressure value measured by the pressure gauge 960, so that the pressurized pressure of the polishing unit 300 during the polishing process is currently polished. The pad 311 can be accurately adjusted to be equal to the reference pressure of the adjustment section in which the pad 311 is located.

The main line 920 is connected to the sub line 980. The sub line 980 is connected to the vacuum member 970 that provides a vacuum pressure, and is connected between a point where the pressure gauge 960 is connected on the main line 920 and a point where the first valve 950 is installed. Connected. The sub line 980 provides a vacuum pressure provided from the vacuum member 970 to the fluid supply part 320 through the main line 920. The vacuum pressure provided from the pad pressure adjusting unit 900 is provided to the bellows 316 through the air injection pipe 327 and the first to third air flow paths AFP1, AFP2, and AFP3. The bellows 316 is lowered in the internal pressure by the vacuum pressure provided from the pad pressure adjuster 900, as a result, the bellows 316 is contracted.

The sub line 980 is provided with a second valve 990 for controlling whether the vacuum pressure provided to the air injection pipe 327 is blocked and supplied.

Again, referring to FIG. 3, the first and second processing fluid supply units 400 and 500 may fix the processing fluid necessary for the polishing process and the cleaning process of the wafer 70 to the substrate support unit 100. Spray to the wafer 70.

The first processing fluid supply unit 400 is installed to face the polishing unit 300 with the container unit 200 interposed therebetween. The first processing fluid supply unit 400 is fixedly installed on the sidewall 221 of the second processing container 220, and during the polishing process or the cleaning process, the first processing fluid supply unit 400 is the spin head. A processing fluid is sprayed onto the wafer 70 fixed to 110 to clean the wafer 70. In the first processing fluid supply unit 400, a drop angle of the processing fluid is adjusted according to a relative vertical position between the spin head 110 (see FIG. 4) and the container unit 200. A detailed description of the first processing fluid supply unit 400 will be described later with reference to FIG. 9.

The second processing fluid supply unit 500 is installed to face the polishing unit 300 with the container unit 200 and the first processing fluid supply unit 400 interposed therebetween. The second processing fluid supply unit 500 includes a chemical liquid nozzle for injecting a processing liquid, and in the cleaning process, the processing liquid is injected onto the wafer 70 fixed to the spin head 110 to thereby spray the wafer 70. Clean. The second processing fluid supply unit 500 may swing, and injects the processing liquid in a state in which the chemical liquid nozzle is disposed on the spin head 110 through a swing operation during the cleaning process.

The brush unit 600 physically removes foreign matter on the surface of the wafer 70 after the polishing process. The brush unit 600 includes a brush pad that contacts the surface of the wafer 70 to physically wipe off the foreign matter on the surface of the wafer 70, and is swingable. During the cleaning process, the brush unit 600 rotates the brush pad in a state in which the brush pad is disposed on the upper portion of the spin head 110 through a swinging motion, and the wafer 70 is fixed to the spin head 110. )).

The aerosol unit 700 is disposed on one side of the brush unit 600. The aerosol unit 700 removes foreign substances on the surface of the wafer 70 by spraying the processing liquid in the form of fine particles on the wafer 70 fixed to the spin head 110. In one example of the present invention, the aerosol unit 700 sprays the treatment liquid in the form of small particles using ultrasonic waves. The brush unit 600 is used to remove foreign particles of relatively large particles, and the aerosol unit 700 is used to remove foreign particles of relatively small particles compared to the brush unit 600.

The pad conditioning unit 800 cleans and regenerates the polishing unit 300 when the polishing unit 300 is standing by at a home port. That is, a predetermined polishing pattern is formed on the surface of the polishing pad 311 (see FIG. 8) in contact with the wafer to improve the efficiency of the polishing process. The polishing pattern is gradually worn out by friction with the wafer in the process of polishing the wafer, and the chemical liquids used in the polishing process may be cured in the polishing pattern. The pad conditioning unit 800 polishes the surface of the polishing pad 311 to regenerate the polishing pad 311.

As described above, in the substrate polishing system 2000, since both the polishing process and the cleaning process of the wafer 70 are performed at each substrate polishing unit 1000, it is necessary to transfer the wafer to the cleaning process chamber after the polishing process. There is no need for a separate cleaning process chamber. Accordingly, the substrate polishing system 2000 may shorten the transfer time and the process time of the wafer 70, improve productivity, and reduce the footprint.

Hereinafter, a configuration of the first processing fluid supply unit 400 will be described in detail with reference to the drawings.

FIG. 9 is an enlarged perspective view of the first processing fluid supply unit illustrated in FIG. 3, and FIG. 10 is a longitudinal cross-sectional view illustrating a positional relationship between the first processing fluid supply unit and the container unit and the substrate support member illustrated in FIG. 9. .

9 and 10, the first processing fluid supply unit 400 is coupled to the second processing container 220, and the processing fluid processing the wafer according to the vertical movement of the container unit 200. The fall angle is adjusted.

Specifically, the first processing fluid supply unit 400 may include an injection part 410, a fixing part 420, and an angle adjusting part 430. The injection unit 410 may include a nozzle 411, a connection pipe 412, a fluid supply line 413, and a tilting control unit 414.

The nozzle 411 is fixedly installed at an outer upper end of the container unit 200, and injects a processing fluid for cleaning or drying the wafer 10. The nozzle 411 has an output end from which the processing fluid is injected, which is located above the upper surface of the container unit 200, and injects the processing fluid to the wafer 10 exposed through the upper opening of the container unit 200. do. The connecting pipe 412 is connected to the input terminal of the nozzle 411, and is fixed to the fixing part 420 so as to be tiltable. The fixing part 420 may include a fixing plate 421 fixedly coupled to an outer wall of the second processing container 220 and a support part 422 coupled to the fixing plate 421. The support part 422 is coupled to the connection pipe 412 and fixes the connection pipe 412 to be tiltable.

The fluid supply line 413 is connected to an input end of the connection pipe 412. The fluid supply line 413 receives the processing fluid from the outside and provides it to the connection pipe 412. The tilting control unit 414 is installed in the connection pipe 412. The tilting adjusting unit 414 adjusts the tilting angle of the connecting pipe 412 according to the position of the contact with the angle adjusting unit 430.

Specifically, the tilting control unit 414 is in contact with the angle control unit 430, and adjusts the center of gravity of the connection pipe 412. The tilting control unit 414 has a contact surface in contact with the angle control unit 430 is protruded than the connection pipe 412. In this embodiment, the contact surface of the tilting adjustment unit 414 is made of a curved surface, the shape of the contact surface is not limited to this may have a variety of shapes. In one example of the present invention, the tilting control unit 414 may have a spherical shape, but may have various shapes such as a cylindrical shape.

The angle adjusting part 430 is installed to face the fixing part 420 with the injection part 410 interposed therebetween. The angle adjuster 430 obtains an adjusting bar 431 having a rod shape, and the adjusting bar 431 is provided with an adjusting groove 431a at a side adjacent to the spraying part 410. The tilting control unit 414 vertically moves along an adjacent side of the control bar 431 when the second processing container 220 moves vertically.

That is, since the fixing plate 421 is fixed to the second processing container 220, the fixing plate 421 moves vertically together with the second processing container 220 when the second processing container 220 moves vertically. Accordingly, the spraying part 410 fixed to the support part 422 also moves vertically, and the tilting adjusting part 414 moves vertically in contact with the support part 422. However, since the angle adjusting unit 430 is positioned separately from the second processing container 220, the angle adjusting unit 430 does not move even if the second processing container 220 moves vertically.

As such, the tilting control part 414 vertically moves by the vertical movement of the second processing container 220 in the fixed bar 422, so that the adjusting bar 422 is the second treatment. The position of the contact point with the tilting control part 414 is changed by the vertical movement of the container 220. The connecting pipe 412 is different from the tilting angle when the tilting control unit 414 is inserted into the adjusting groove 431a and the tilting angle when the tilting control unit 414 is not inserted into the adjusting groove 431a. In one example of the present invention, when the tilting control unit 414 is not inserted into the adjusting groove 431a, the connecting pipe 412 is disposed substantially perpendicular to the ground. On the other hand, when the tilting control unit 414 is inserted into the adjusting groove 431a, the connecting pipe 412 is inclined at an angle smaller than 90 degrees with respect to the ground.

As such, the inclination of the connection pipe 412 is changed according to the position of the contact of the tilting control unit 414 with respect to the control bar 431, so that the drop angle of the processing fluid injected from the nozzle 411 is also changed. do. As a result, the injection unit 410 can adjust the point where the processing fluid injected from the nozzle 411 reaches the wafer 70, so that the injection of the wafer 70 in the container unit 200 is performed. The drop angle of the processing fluid injected from the nozzle 411 may be adjusted according to the position. Accordingly, the injection unit 410 may provide a processing fluid to the center of the wafer 70 even when the vertical position of the wafer 70 is changed in the process, thereby improving the yield of the product.

The angle adjusting part 430 may further include a screw 432 for adjusting the inclination of the connecting pipe 412 in a state in which the tilting adjusting part 414 is inserted into the adjusting groove 431a.

FIG. 11 is an enlarged cross-sectional view of the adjusting screw illustrated in FIG. 10.

10 and 11, a hole is formed in a central portion of a surface defining the adjusting groove 431a, and the screw 432 is coupled to the hole. At this time, the screw 432 is inserted from the side facing the side formed with the adjustment groove (431a), the length of the body is inserted into the hole is longer than the length of the hole. Therefore, the end of the body may be inserted into the insertion groove 431a according to the length of the portion inserted into the hole. When the body of the screw 432 protrudes into the insertion groove 431a while the tilting control part 414 is inserted into the insertion groove 431a, the body of the screw 432 is the tilting control part. 414 is supported, and the tilting adjustment part 414 is spaced apart from a surface defining the insertion groove 431a. The separation distance between the tilting adjusting part 414 and the surface defining the insertion groove 431a is adjusted according to the length of the body of the screw 432 protruding into the insertion groove 431a.

The inclination of the connecting pipe 412 in the state in which the tilting adjustment unit 414 is inserted into the insertion groove 431a is a separation distance between the surface defining the tilting adjustment unit 414 and the insertion groove 431a. Is adjusted accordingly. Accordingly, the first processing fluid supply unit 400 can more precisely adjust the drop angle of the processing fluid injected from the nozzle 411, thereby improving process precision and product yield.

In this embodiment, the substrate polishing unit 1000 includes one first processing fluid supply unit 400, but the first processing fluid supply unit 400 may process efficiency of the substrate polishing unit 1000. It may increase accordingly.

Hereinafter, a process of polishing and cleaning the wafer by the substrate polishing unit 1000 will be described in detail with reference to the accompanying drawings.

12A and 12B are longitudinal sectional views showing an operating state in which the first processing fluid supply unit shown in FIG. 9 cleans a wafer.

4 and 12A, first, the wafer 10 is seated on the spin head 110 of the substrate support member 100, and the first and second processing containers 210 and 220 are lifted members 230. Move upwards so that the wafer 10 is positioned within the first processing vessel 210. In this case, the injection unit 410 and the fixing unit 420 of the first processing fluid supply unit 400 also move upward together with the second processing container 220. Accordingly, the tilting adjusting part 414 is inserted into the adjusting groove 431a of the angle adjusting part 430, and the connecting pipe 412 of the spraying part 410 is inclined to the ground side in a vertical state. As a result, the drop angle of the processing fluid injected from the injection portion 410 becomes larger than when the connecting pipe 412 is in a vertical state.

Subsequently, the pressing unit 310 of the polishing unit 300 is disposed on the upper surface of the wafer 70, and the pressing unit 310 swings simultaneously with the rotation while spraying the polishing chemical to polish the wafer 70. do.

The first processing fluid supply unit 400 may supply a processing fluid such as ultrapure water while polishing the wafer 70 to prevent the polishing chemical from being cured. In addition, after polishing is completed, a processing fluid such as ultrapure water is provided to the wafer 70 during the cleaning process by the brush unit 600 (see FIG. 3) to clean the wafer 70. In this case, the first processing fluid supply unit 400 injects the processing fluid toward the center of the wafer 70.

Referring to FIG. 12B, after cleaning by the brush unit 600, the first and second processing containers 210 and 220 are moved downward to move the wafer 70 to the upper portion of the first processing container 210. In the second processing vessel 220. At this time, the injection unit 410 also moves downward, the tilting control unit 414, which was inserted into the control groove 431a is separated from the control groove 431a is in contact with the side of the control bar 431 Move down to the state. Accordingly, the tilting adjustment unit 414 is supported by the side of the control bar 431, the connection pipe 412 is disposed perpendicular to the ground.

In the state in which the connection pipe 412 is vertically disposed, the processing fluid is injected into the center of the wafer 70 to clean the wafer 70. At this time, the falling angle of the processing fluid injected from the injection unit 410 is smaller than the falling angle of the injection unit 410 shown in Figure 12a.

As described above, since the drop angle is adjusted according to the vertical position of the wafer 70, the first processing fluid supply unit 400 may inject the processing fluid to a predetermined position of the wafer 70.

Although described with reference to the above embodiments, those skilled in the art will understand that various modifications and changes can be made without departing from the spirit and scope of the invention as set forth in the claims below. Could be.

1 is a view schematically showing a sheet type polishing system according to an embodiment of the present invention.

FIG. 2 is a side view showing the sheet type polishing system shown in FIG. 1.

3 is a perspective view illustrating the substrate polishing unit illustrated in FIG. 1.

4 is a partial cutaway perspective view specifically showing the substrate support unit and the processing container shown in FIG. 3.

FIG. 5 is a perspective view illustrating the polishing unit illustrated in FIG. 3.

FIG. 6 is a partial cutaway side view of the polishing unit shown in FIG. 5. FIG.

FIG. 7 is a longitudinal cross-sectional view illustrating the pressurizing unit and the fluid supply unit illustrated in FIG. 5.

FIG. 8 is a perspective view illustrating the pressurizing unit and the fluid supply unit illustrated in FIG. 5.

9 is a perspective view of the first processing fluid supply unit shown in FIG. 3.

10 is a longitudinal sectional view showing the first processing fluid supply unit shown in FIG. 9.

FIG. 11 is an enlarged cross-sectional view of the adjusting groove illustrated in FIG. 10.

12A and 12B are cross-sectional views showing an operating state in which the first processing fluid supply unit shown in FIG. 9 ejects a fluid.

Explanation of symbols on the main parts of the drawings

100: substrate support member

200: container unit

300: polishing unit

400: first processing fluid supply unit

500: second processing fluid supply unit

600: Brush Unit

700: aerosol unit

800: Pad Conditioning Unit

1000: substrate polishing part

Claims (15)

A nozzle for injecting fluid, a connection pipe coupled to an input end of the nozzle to provide the fluid to the nozzle, a fluid supply line coupled to an input end of the connection pipe and providing the fluid to the connection pipe, and to the connection pipe. A spraying unit which is installed and has a tilting control unit for adjusting a tilting angle of the connecting pipe, and which is vertically movable; A fixing part for fixing the injection part to be tiltable; And Facing the fixing portion with the injection portion therebetween, one side is in contact with the tilting adjustment portion, and adjusts the drop angle of the fluid injected from the injection portion in accordance with the contact position in the vertical direction with the tilting adjustment portion And an angle adjuster having an adjustment groove capable of inserting the tilting adjuster on a side contacting the tilting adjuster; The tilting control unit is a fluid supply unit, characterized in that the surface in contact with the angle adjuster protrudes than the connecting pipe. delete delete A nozzle for injecting fluid, a connection pipe coupled to an input end of the nozzle to provide the fluid to the nozzle, a fluid supply line coupled to an input end of the connection pipe and providing the fluid to the connection pipe, and to the connection pipe. A spraying unit which is installed and has a tilting control unit for adjusting a tilting angle of the connecting pipe, and which is vertically movable; A fixing part for fixing the injection part to be tiltable; And Facing the fixing portion with the injection portion therebetween, one side is in contact with the tilting adjustment portion, and adjusts the drop angle of the fluid injected from the injection portion in accordance with the contact position in the vertical direction with the tilting adjustment portion And an angle adjuster having an adjustment groove capable of inserting the tilting adjuster on a side contacting the tilting adjuster; An insertion hole is provided at the center of the surface defining the adjusting groove, The angle adjusting unit further includes a screw inserted into the insertion hole from the side facing the side formed with the adjustment groove, And the length of the screw is longer than the length of the insertion hole. A substrate support member on which a substrate is mounted; A container unit accommodating the substrate supporting member, providing a space in which the substrate is processed, and capable of vertical movement; And A fluid supply unit installed outside the container unit and injecting a fluid to a substrate seated on the substrate support member; The fluid supply unit, A nozzle for injecting fluid, a connection pipe coupled to an input end of the nozzle to provide the fluid to the nozzle, a fluid supply line coupled to an input end of the connection pipe and providing the fluid to the connection pipe, and to the connection pipe. An injection unit having a tilting control unit installed and adjusting a tilting angle of the connection pipe; A fixing part fixedly coupled to the container unit and configured to tilt the injection part in a tiltable manner; And Facing the fixed portion with the injection portion therebetween, one side is in contact with the tilting adjustment portion, and adjusts the drop angle of the fluid injected from the injection portion in accordance with the contact position in the vertical direction with the tilting adjustment portion Substrate processing apparatus comprising an angle adjuster. The method of claim 5, The container unit, A plurality of processing containers each of which surrounds the substrate supporting member and is arranged in a stacked structure; And And an elevating member coupled to the processing vessels to move the processing vessels vertically to change the relative vertical position of the substrate seated on the substrate support member relative to the processing vessels. The method of claim 6, The angle adjusting unit has a substrate processing apparatus, characterized in that the side that is in contact with the tilting control portion provided with an adjustment groove that can be inserted into the tilting control portion. The method of claim 7, wherein An insertion hole is provided at the center of the surface defining the adjusting groove, The angle adjusting unit further includes a screw inserted into the insertion hole from the side facing the side formed with the adjustment groove, The length of the screw is a substrate processing apparatus, characterized in that longer than the length of the insertion hole. The method according to any one of claims 5 to 8, And a polishing unit that is rotatable and swingable and that polishes an upper surface of the substrate seated on the substrate support member. 10. The method of claim 9, The polishing unit, A chemical liquid nozzle for spraying a polishing chemical onto a substrate seated on the substrate support member; And A polishing pad disposed on an upper portion of the substrate support member during the polishing process, the pad hole having a size smaller than that of the substrate, providing a pad hole exposing the chemical liquid nozzle, and polishing the substrate through friction with an upper surface of the substrate; Substrate processing apparatus comprising a pad. delete Mounting a substrate on a substrate support member received in the container unit; And The nozzle of the fluid supply unit fixed to the outer upper end of the container unit moves vertically with the container unit, and the nozzle is in the center of the substrate while the inclination is automatically adjusted as the vertical position of the substrate is changed in the container unit. Cleaning the substrate by spraying a fluid toward the substrate; Cleaning the substrate, The container unit is moved vertically so that the substrate is placed in an N (where N is at least one natural number) processing container among the plurality of processing containers of the container unit, and at the same time the nozzle is moved vertically with the container unit. Adjusting the slope with respect to the first slope; The nozzle spraying a fluid toward a center portion of the substrate to clean the substrate; Vertically moving the vessel unit to position the substrate into an N + M (where M is one or more natural numbers) of the plurality of processing vessels, and at the same time the nozzle moves vertically with the vessel unit Adjusting a second inclination different from the first inclination; And The nozzle spraying a fluid toward a central portion of the substrate to clean the substrate, The inclination of the nozzle is adjusted according to the contact position between the tilting control unit connected to the lower part of the nozzle and the angle adjusting unit facing the container unit with the tilting control unit therebetween, The position of the contact between the tilting adjustment unit and the angle adjustment unit is changed by the vertical movement of the nozzle by the vertical movement of the container unit, And a dropping angle of the fluid injected from the nozzle is adjusted according to the inclination of the nozzle. The method of claim 12, The angle adjustment unit is provided with an adjustment groove on the surface in contact with the tilting adjustment unit, One of the first and second inclinations is an inclination when the tilting adjustment part is not inserted into the adjustment groove, and the other one is a inclination when the tilting adjustment part is inserted in the adjustment groove. Way. The method of claim 13, The angle adjustment unit provides an insertion hole in the center of the surface defining the adjustment groove, The inclination when the tilting adjustment portion is inserted into the adjustment groove of the first and second inclination is adjusted according to the length of the screw inserted into the insertion hole protruding into the adjustment groove. Mounting a substrate on a substrate support member received in the container unit; And The nozzle of the fluid supply unit fixed to the outer upper end of the container unit moves vertically with the container unit, and the nozzle is in the center of the substrate while the inclination is automatically adjusted as the vertical position of the substrate is changed in the container unit. Cleaning the substrate by spraying a fluid toward the substrate; And polishing the substrate between the step of seating the substrate on the substrate support member and cleaning the substrate.

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