WO2006030953A1 - 基板洗浄処理装置及び基板処理ユニット - Google Patents
基板洗浄処理装置及び基板処理ユニット Download PDFInfo
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- WO2006030953A1 WO2006030953A1 PCT/JP2005/017318 JP2005017318W WO2006030953A1 WO 2006030953 A1 WO2006030953 A1 WO 2006030953A1 JP 2005017318 W JP2005017318 W JP 2005017318W WO 2006030953 A1 WO2006030953 A1 WO 2006030953A1
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- substrate
- processing
- processing unit
- cleaning
- liquid
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Classifications
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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
- H01L21/67028—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like
- H01L21/6704—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like for wet cleaning or washing
- H01L21/67051—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like for wet cleaning or washing 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
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67155—Apparatus for manufacturing or treating in a plurality of work-stations
- H01L21/67207—Apparatus for manufacturing or treating in a plurality of work-stations comprising a chamber adapted to a particular process
Definitions
- the present invention relates to a substrate cleaning apparatus and a substrate processing unit for performing a cleaning process on a substrate (semiconductor wafer or the like) used for manufacturing a semiconductor device.
- the present invention has been made in view of the above points, and an object of the present invention is to provide a substrate cleaning processing apparatus that does not require positioning of a transfer system when starting up the apparatus and can reduce the installation area of the apparatus. .
- Another object of the present invention is to effectively prevent secondary contamination of the substrate due to deposits in the substrate processing unit, particularly in a downsized apparatus.
- a substrate cleaning apparatus of the present invention includes a substrate transfer apparatus that transfers a substrate to a single base-integrated frame, and at least performs substrate processing. Equipped with one substrate processing unit, a substrate load port for mounting the substrate storage cassette, and a processing liquid supply device that supplies processing liquid to the substrate processing unit, and maintenance of the substrate processing unit is performed from the back of the device It is configured to be able to. According to the present invention, since the substrate transfer device, the substrate processing unit, the substrate load port, and the processing liquid supply device are mounted on one base-integrated frame, the substrate processing unit can be freely combined to form a base.
- a multi-process type substrate cleaning system that can handle at least one process.
- it can be transferred without being divided because of the integrated structure, and the positional relationship of the substrate transport system is supported, so that work such as positioning setting at the time of equipment installation is not required, and the start-up time of the equipment can be greatly shortened.
- the installation area of the equipment can be minimized.
- the maintenance of the substrate processing unit can be performed from the back of the apparatus, making maintenance easier.
- At least one substrate processing unit may be a substrate processing unit that can be dried and finally processed by itself.
- At least one or more substrate processing units are finally subjected to a drying process, and a substrate processing unit that can complete the process processing as a single unit can complete the substrate processing by the substrate processing unit. Is possible.
- At least one or more substrates may be a substrate processing unit that can perform at least one of a double-sided substrate cleaning process, a substrate bevel etching process, and a single-side scrubbing process, and a drying process.
- the substrate processing unit can perform at least one of a double-sided cleaning process, a bevel etching process, and a scrub process, and a drying process, and can reduce the size of the apparatus.
- Another substrate cleaning apparatus of the present invention is disposed between a substrate load port on which a substrate storage cassette is placed, a substrate processing unit for processing a substrate, a substrate load port and a substrate processing unit, and the load port And a substrate processing unit for transporting a substrate only between the substrate processing unit and the substrate processing unit.
- the substrate transfer device is disposed between the substrate load port and the substrate processing unit and transfers the substrate only between the load port and the substrate processing unit, the transfer distance of the substrate can be reduced. It is possible to minimize the cause of the occurrence.
- the substrate processing unit is preferably arranged in parallel with the substrate load port.
- the substrate transfer distance between the substrate load board and the substrate processing unit is shortened, and unnecessary substrate delivery is not required at all. In operation, the substrate can be transported and the generation factor of particles can be minimized.
- the processing liquid supply apparatus preferably has a configuration capable of supplying two or more types of processing liquids to the substrate processing unit.
- the processing liquid supply device can supply two or more types of processing liquids to a plurality of substrate processing units, even if a substrate processing unit that uses a plurality of processing liquids is mounted, the processing liquid This can be handled without changing the feeder.
- the processing liquid supply apparatus may include a plurality of supply tanks for each processing liquid. By providing a plurality of supply tanks for each treatment liquid, the treatment liquid supply device can supply the treatment liquid by switching to another supply tank even if there is no treatment liquid in the supply tank supplying the treatment liquid. Because it can, you can continue processing.
- the treatment liquid it is preferable to supply the treatment liquid alternately from a plurality of supply tanks. By supplying the treatment liquid alternately from multiple supply tanks, the treatment can be continued.
- the dried substrate can always be taken out from the substrate processing unit, and the transfer device and the inside of the device are not contaminated with the processing liquid or the like.
- the substrate drying means preferably includes gas injection means for injecting an inert gas onto the back surface of the substrate.
- the substrate drying means with gas injection means for injecting an inert gas onto the back surface of the substrate, the back surface of the substrate can be simultaneously dried.
- a purge plate for injecting an inert gas toward the outer periphery of the substrate for drying the substrate surface after the bevel etching process in the substrate processing unit.
- a purge plate for injecting an inert gas toward the outer periphery of the substrate is provided, so that the bevel portion of the substrate after the bevel etching process is provided. The remaining liquid can be removed and dried quickly.
- the purge plate is not used at least from the outer periphery of the substrate and from two or more locations inside it. It is preferable that the active gas is injected.
- the purge plate sprays inert gas from at least two locations inside and outside the substrate, so that when the substrate is dried, the inert gas is first sprayed from the inside and then sprayed to the outer periphery.
- the etching processing section of the bevel can be dried while the liquid at the outer peripheral portion is expelled to the outside.
- the substrate transfer device is preferably a fixed transfer robot that does not have a travel axis.
- the substrate processing apparatus of the present invention includes a substrate transfer device for transferring a substrate, a substrate processing unit for processing a substrate, a substrate load port for mounting a substrate storage capacity set, and a processing liquid to the substrate processing unit.
- a substrate processing apparatus equipped with a processing liquid supply apparatus to supply the pressure outside the substrate processing apparatus is P 0, the pressure PA in the substrate transport chamber where the substrate transport apparatus is located, and the pressure inside the substrate processing unit is PB. The following relationship is maintained.
- the pressure PA in the substrate transfer chamber PA> the pressure P 0 outside the substrate processing apparatus P 0> the pressure PB in the substrate processing unit does not flow into the substrate transfer chamber.
- the processed substrate cleaned in the substrate processing unit is not contaminated by particles in the airflow flowing from the outside.
- a substrate processing unit of the present invention is a substrate processing unit used in a processing region to which a clean gas is supplied, and a chamber disposed in the processing region and a substrate can be rotated in a horizontal plane in the chamber.
- a substrate holding unit that holds the substrate and a processing fluid supply unit that supplies a processing fluid toward the substrate held by the substrate holding unit, and the chamber includes a gas collecting unit formed above the substrate holding unit.
- Air flow forming means is provided for forming an air flow that uniformly envelops the substrate held by the substrate holding portion by taking in the clean air from the inlet and exhausting it from the bottom side.
- the substrate held by the substrate holding part is shielded by the downdraft (air curtain) formed by the clean gas, contaminants from the chamber inner wall and the mechanism in the chamber to the substrate can be prevented. Movement is hindered.
- the processing liquid even during processing of the substrate, it is possible to prevent the processing liquid from splashing on the inner wall of the chamber and the mechanism in the chamber. Therefore, in a double sense, secondary contamination of the substrate is reduced or prevented. Is done.
- the gas intake port is formed along a peripheral edge of the substrate held by the substrate holding unit. It is preferable that it is formed.
- Another substrate processing unit of the present invention is a substrate processing unit used in a processing region to which a clean gas is supplied, and a chamber disposed in the processing region, and a substrate is rotated in a horizontal plane in the chamber.
- a substrate holding unit that can be held, a processing fluid supply unit that supplies a processing fluid toward the substrate held by the substrate holding unit, and covers the surface of the substrate with a predetermined gap, and a gas is provided in the gap.
- a purge member that prevents the processing fluid from entering the gap, wherein the purge member includes a first covering member that covers a first region of the substrate surface, and a second member of the substrate surface. At least one of the second covering member and the force covering the area is provided so as to be movable with respect to the other.
- the first covering member and the second covering member can be selectively brought close to the substrate, so that part of the surface of the substrate is exposed and part of the surface is covered so that the efficiency is improved. Can be made to achieve both basic processing and protection.
- the substrate holding portion has a plurality of rollers having axes in the vertical direction, and these roller rollers are provided with a roller cover in which an opening is formed for the rollers to hold the substrate. It is preferable.
- the roller cover leaves the opening necessary to hold the substrate and covers the roller, thereby reducing the adhesion of processing liquid to the roller and reducing secondary contamination of the substrate via the roller. Or it is prevented. ⁇
- a gas nozzle for injecting gas toward the substrate is provided, and a nozzle cover for covering the gas nozzle when not in use is provided.
- cleaning liquid supply means for cleaning the inner wall of the chamber at a predetermined timing is provided.
- the inner wall of the chamber is cleaned at a predetermined timing, so that secondary contamination of the substrate through the inner wall is reduced or prevented.
- Still another substrate cleaning apparatus of the present invention includes the substrate processing unit, a frame that forms a space for accommodating the substrate processing unit, and an air supply unit that supplies a clean gas to the space. This reduces or prevents secondary contamination and processes high-quality substrates.
- a holding part suction part for sucking the processing fluid is provided in the substrate holding part.
- the substrate holding unit includes a plurality of rollers that contact the end portion of the substrate and rotate the substrate, and the plurality of rollers move along a radial direction of the substrate.
- the direction of the roller force acting on the substrate is directed to the center of the substrate, so that the stability of the rotation center position of the substrate can be improved and the rotation accuracy of the substrate can be improved.
- the processing unit includes a substrate holding unit that rotates and holds the substrate, and rotates the substrate to supply a fluid to the substrate for processing.
- the substrate holding part is provided with a holding part suction part for sucking the fluid.
- the processing unit is disposed above and below the substrate holding unit that horizontally holds and rotates the substrate, and the substrate held by the substrate holding unit, A gas supply nozzle that supplies a gas to the substrate; a liquid supply nozzle that is disposed above and below the substrate held by the substrate holder; and that supplies a liquid to the substrate; the gas supply nozzle and the liquid supply And a moving mechanism for moving the nozzle from the central portion of the substrate to the peripheral portion, and the liquid supply nozzle is disposed outside the gas supply nozzle in the radial direction of the substrate.
- the processing unit is provided with at least one fluid supply port and one fluid suction port in the vicinity of the rotating substrate, and at least one fluid supply port.
- a processing fluid is supplied from the mouth to the substrate, and the processing fluid attached to the substrate is sucked from the fluid suction port.
- the processing unit is provided with a substrate holding portion that holds and rotates the substrate, and the substrate holding portion abuts against an end portion of the substrate to remove the substrate.
- a plurality of rollers to be rotated are provided, and the plurality of rollers move along the radial direction of the substrate.
- FIG. 1 is an external view showing an embodiment of a substrate cleaning apparatus according to the present invention.
- FIG. 2 is a plan view of the substrate cleaning apparatus of FIG.
- FIG. 3 is a plan view of the frame of the substrate cleaning apparatus of FIG.
- Figure 4 shows the side view of the frame of the substrate cleaning equipment shown in Figure 1 (the side of the arrow A in Figure 3).
- Fig. 5 is a rear view of the frame of the substrate cleaning apparatus of Fig. 1 (side view of arrow B in Fig. 3).
- FIG. 6 is a plan view showing the air flow in the substrate cleaning apparatus according to the present invention.
- FIG. 7 is a side view showing the flow of air in the substrate cleaning apparatus according to the present invention.
- FIG. 8 is a plan view showing air flow and atmospheric pressure in the substrate cleaning apparatus according to the present invention.
- FIG. 9 is a diagram showing an embodiment of the system of the processing liquid supply apparatus of the substrate cleaning processing apparatus according to the present invention.
- FIG. 10 is a view showing a processing liquid supply flow of the substrate cleaning processing apparatus according to the present invention.
- FIG. 11 is a diagram showing a processing liquid supply flow of the substrate cleaning processing apparatus according to the present invention.
- FIG. 12 is a diagram showing an embodiment of a substrate processing unit of a substrate cleaning processing apparatus according to the present invention.
- FIG. 13A to FIG. 13C are diagrams showing the configuration of the etching part of the substrate processing unit.
- FIGS. 14A and 14B are views showing an embodiment of the drying mechanism of the substrate processing unit of the substrate cleaning processing apparatus according to the present invention.
- FIG. 15 is a view showing another embodiment of the drying mechanism of the substrate processing unit of the substrate cleaning processing apparatus according to the present invention.
- FIG. 16 is a view showing another embodiment of the substrate cleaning apparatus according to the present invention.
- FIG. 17 is a view showing the top plate of the chamber of the substrate processing unit in the embodiment of FIG.
- FIG. 18 is a cross-sectional view showing the configuration of the substrate processing unit in the embodiment of FIG.
- FIG. 19 is a diagram showing the configuration of the substrate holding part of the substrate processing unit of FIG.
- FIG. 20 is a cross-sectional view showing the configuration of the substrate holding portion of the substrate processing unit of FIG. 18.
- FIG. 21 is a cross-sectional view showing details of the clamp portion of the substrate holding portion of FIG.
- FIGS. 22A to 22C are views showing details of the roller cover of the substrate holding portion of FIG.
- FIG. 23 is a diagram showing a state when the substrate processing unit of FIG. 18 is performing a bevel etching process.
- FIGS. 24A to 24C are views showing the operation of the gas spray nozzle of the substrate processing unit of FIG.
- FIGS. 25A and 25B are views showing the operation of the inner wall cleaning nozzle in the substrate processing unit of FIG.
- FIG. 26 is a diagram showing an air flow formed in the chamber in the substrate processing unit of FIG.
- FIG. 27 is a view showing a modification of the air intake port of the substrate processing unit of FIG.
- FIG. 28A and FIG. 28B are modified examples of the substrate processing unit of FIG. 18 and are diagrams illustrating the operation of the roller cover single cleaning nozzle.
- FIG. 29 is a perspective view schematically showing a substrate processing unit according to another embodiment of the present invention.
- FIG. 30A to FIG. 30D are enlarged views showing a substrate holding part of the substrate processing unit of FIG. 29.
- FIG. 30A is a plan view
- FIG. 30B is a sectional view
- FIG. FIG. 30B is a sectional view showing a modification of FIG. 30B
- FIG. 30D is a plan view showing a modification of FIG. 3 OA.
- 3A to 3D are diagrams for explaining the positional relationship between the gas supply nozzle and the liquid supply nozzle shown in FIG. 29.
- FIG. 32 is a plan view of a substrate processing unit according to another embodiment of the present invention.
- FIG. 33 is a side view showing the main part of the substrate processing unit of FIG.
- FIG. 3 4 A is an enlarged view of the cleaning nozzle shown in Fig. 3 3, and Fig. 3 4 B shows the suction port. A cross-sectional view is shown, and FIG. 34C shows a cross-sectional view of the supply port.
- FIG. 35 is a schematic diagram showing the reciprocating motion of the cleaning nozzle.
- Fig. 36 A is a diagram showing the supply and suction of fluid (liquid) onto the substrate
- Fig. 36 B is a diagram showing an example in which the fluid (liquid) is supplied in a vortex shape.
- 36 C is a diagram showing an example in which fluid (liquid) is supplied in an unstable manner
- FIG. 36 D is a diagram showing a trajectory due to the reciprocating motion of the supply port and the suction port.
- FIG. 37 is a plan view showing the configuration of the main part of the substrate processing unit according to another embodiment of the present invention.
- FIG. 38 is a cross-sectional view of the substrate processing apparatus shown in FIG.
- FIG. 39 is a block diagram showing the system configuration of the substrate processing apparatus shown in FIG. 38.
- FIG. 1 and 2 are views showing an embodiment of a substrate cleaning apparatus according to the present invention.
- FIG. 1 is a schematic perspective view
- FIG. 2 is a schematic plan view.
- This substrate cleaning processing apparatus has a base-integrated frame 1, a fixed transfer robot 2 as a substrate transfer device for transferring a substrate, substrate processing units 3 and 3 for processing a substrate, and a substrate. It is equipped with substrate load ports 5 and 5 on which the storage cassettes 4 and 4 are placed, and a processing liquid supply device 6 for supplying a processing liquid to the substrate processing units 3 and 3.
- a fan filter unit 7 is attached to the ceiling of the frame 1, and a control panel 8 is mounted on the top of the frame 1. Further, instrumentation sections 9 and 9 and exhaust ducts 10 and 10 are arranged on the outer side portions of the substrate processing units 3 and 3. Dampers 1 2 and 1 2 are provided between the substrate transfer chamber 11 in which the fixed transfer robot 2 is arranged and the substrate processing units 3 and 3. The outside of the substrate transfer chamber 1 1 has a space 13 for people to enter for maintenance, and the outside of the substrate processing units 3 and 3 has a space 14 for people to enter for maintenance. . 3 to 5 are diagrams showing the structure of the frame 1, FIG. 3 is a plan sectional view, FIG. 4 is a side sectional view seen from the direction of arrow A in FIG. 3, and FIG.
- the frame 1 is a base-integrated frame in which the base 1a and the frame 1b are integrated, and has a cubic shape with a rectangular plane and side surface, and a frame for placing the substrate processing units 3 and 3 inside.
- 1 c is erected on the base 1 a.
- the transport robot 2 is mounted on the base 1a surface of the base-integrated frame 1 having such a configuration, the substrate processing units 3 and 3 are mounted on the frame 1c, and the outside of the frame 1b.
- Board load ports 5 and 5 are installed.
- Substrate load ports 5 and 5 and substrate processing • Units 3 and 3 are arranged parallel to each other with the substrate transfer chamber 11 therebetween.
- a substrate cleaning processing apparatus a plurality of (two in the figure) substrate processing units 3 and 3 necessary for substrate processing can be mounted on the frame 1 with an integrated base.
- the external dimensions and mounting dimensions of the substrate processing units 3 and 3 are all the same. Therefore, a substrate cleaning apparatus that can handle a plurality of processes is configured by freely combining a plurality of substrate processing units 3 together.
- instrumentation sections 9 and 9 are arranged on the sides of the substrate processing units 3 and 3.
- the substrate cleaning processing apparatus since the substrate cleaning processing apparatus has an integral structure, the substrate cleaning processing apparatus can be integrally transferred without being divided. In addition, since it is an integrated structure, it is a substrate transfer system. • The positional relationship of the transfer robot 2 is supported, and there is no need for positioning setting when installing the device, and the device startup time can be greatly shortened. . Furthermore, since the processing liquid supply device 6 and the control panel (power supply) 8 are also installed, the installation area of the system can be minimized. In addition, since spaces 1 3 and 1 4 that can enter the outside of the substrate transfer chamber 1 1 and the outside of the substrate processing units 3 and 3 are provided, the inside of the substrate transfer chamber 1 1 and the substrate processing units 3 and 3 There is no problem in maintenance.
- the maintenance of the substrate processing units 3 and 3 can be performed in the space 14, that is, the back of the apparatus. That is, the shape, size, and arrangement of each substrate processing unit 3 are set so that the inside of the substrate processing units 3 and 3 can be accessed from the back of the apparatus.
- a fixed transfer robot 2 that does not have a travel axis is used as the substrate transfer device.
- the transport port pot 2 has a plurality of hands 2a that operate independently of each other in the dry specification, and these hands 2a can be rotated back and forth, left and right, up and down, and swiveled.
- the frame portion 1 b facing the substrate storage cassettes 4 and 4 and the partition walls of the substrate processing units 3 and 3 are provided.
- the board can be transferred and delivered via four openable and closable shutters (4 locations, not shown).
- all of the substrate processing units 3 and 3 are placed opposite to the substrate storage cassettes 4 and 4, there is no need for wasteful substrate delivery, and the minimum required operation by the fixed transfer robot 2 The substrate can be transferred.
- FIG. 6 and 7 are diagrams showing the air flow (airflow) in the substrate cleaning apparatus according to the present invention.
- This substrate cleaning processing apparatus is usually installed in a clean room, and the air taken in from the inside of the tower room passes through the fan filter unit 7 to remove particles and the like, and is introduced into the apparatus.
- a part of the air passing through the fan filter unit 7 descends in the substrate transfer chamber 11 as a descending airflow AO 1, and the other air A 0 2 is above the substrate processing unit 3.
- the air flows down into the substrate processing unit 3 from the ceiling of the substrate processing unit 3 as a dispersed downflow AO 3.
- a chemical filter 17 may be installed in front of the fan filter unit 7.
- the instrumentation unit 9 is disposed on the side of the substrate processing units 3 and 3 outside the apparatus.
- a part of the air in the substrate transfer chamber 11 is converted into an air flow A 0 9 through a damper 12 that is provided between the substrate transfer chamber 11 and the substrate processing unit 3 and has an adjustable supply amount. Then, it is guided into the substrate processing unit 3. Also, under the substrate processing unit 3, a valve pox 16 containing various valves for supplying the processing liquid in the instrumentation section 9 to the substrate processing unit 3 is arranged. This valve pox 1 As shown in FIG. 7 in FIG. 6, a part of the air in the substrate transfer chamber 11 flows as an air flow A 0 4. Further, each part of the frame 1, the substrate processing unit 3, the instrumentation unit 9, and the processing liquid supply device 6 is partitioned by an outer wall, and each is adjusted to a predetermined pressure.
- the air is contaminated by these mists, etc., and the air in the substrate processing unit 3 is exhausted from its bottom as AO 5 dedicated
- the exhaust duct 10 is exhausted through 10.
- the air in the valve box 16 may be contaminated with mist. It becomes exhaust AO 6 and is exhausted through the exhaust duct 10.
- a part of the air in the substrate transfer chamber 11 is discharged as air A07 through the damper 15 as shown in FIG.
- a part of the air in the substrate transfer chamber 11 flows as the airflow AO 8 through the bottom of the valve box 16 and is discharged from the exhaust duct.
- the air may have its temperature and humidity adjusted to a predetermined value, or an inert gas (for example, N 2 gas) may be supplied instead of air. As a result, it is possible to prevent the processing substrate from being deteriorated during processing or transportation.
- FIG. 8 is a diagram showing the pressure inside the substrate cleaning apparatus according to the present invention and the pressure outside the apparatus.
- the atmospheric pressure (atmospheric pressure) outside the equipment is P 0
- the atmospheric pressure inside the substrate transfer chamber 1 1 is PA
- the atmospheric pressure inside the substrate processing unit 3 is PB
- PA> P 0> PB is maintained. Adjust each atmospheric pressure. This keeps the atmosphere in the substrate transfer chamber 11 1 clean (prevents air from leaking out of the equipment) and transfers the substrate that has been processed in the substrate processing nut 3 with the hand 2a of the transfer robot 2. It can be stored in the substrate storage cassette 4 in a clean state.
- a plurality of supply tanks are arranged for each substrate processing unit 3 in the processing liquid supply apparatus 6. All processing liquids are supplied from the supply tank by pressure feeding with inert gas (eg N 2 gas). For this reason, unlike supply by a pump or the like, there is no pulsation at the time of supply, and there is no problem such as generation of particles, so that a stable treatment liquid can be supplied. Two or more types of processing solutions can be supplied to multiple (two in the figure) substrate processing units 3 and 3, respectively.
- a plurality of supply tanks are provided for each treatment liquid, and the treatment liquids are alternately supplied from the plurality of supply tanks.
- FIG. 9 is a diagram showing an embodiment of a system of a processing liquid supply apparatus for supplying a single type of processing liquid to one substrate processing apparatus.
- a plurality of (two in the figure) supply tanks 2 1 and 2 2 are provided for one type of processing liquid, and the processing liquid is supplied to each of the supply tanks 2 1 and 2 2. Therefore, treatment liquid supply valves V1, V4, inert gas supply pulp V2, V5, and pressure relief valves V3, V6 for supplying inert gas are connected.
- valves V 7 and V 8 are connected to supply tanks 2 1 and 2 2, respectively. By switching these valves V 7 and V 8, the processing liquid is alternately supplied from supply tank 2 1 or supply tank 2 2 to the substrate. It is to be supplied to the processing unit 3.
- the substrate processing unit 3 includes a valve V 9 and a processing liquid injection nozzle 23 for injecting a processing liquid, and injects the processing liquid supplied through the valve V 9 onto the processing substrate W. Valves V 1 to V 9 are located in the above valve box 16 (see Fig. 7) Yes.
- the supply tank 21 is provided with an upper limit sensor S 1 and a lower limit sensor S 2, and the supply tank 22 is also provided with an upper limit sensor S 3 and a lower limit sensor S 4.
- the processing liquid supply device 6 includes a pressure sensor P 1 for detecting the processing liquid pressure discharged from the supply tank 21 and a pressure sensor P 2 for detecting the processing liquid pressure discharged from the supply tank 22. .
- the supply of the treatment liquid from the supply tanks 21 and 22 is performed using the inert gas pressure supplied via the inert gas supply valves V 2 and V 5 as power.
- the pressure of the processing liquid from supply tanks 21 and 22 is monitored by pressure sensors P 1 and P 2, and if the pressure becomes higher than necessary, the pressure relief valves V 3 and V6 are opened, and the gas in the supply tanks 21 and 22 is released. I'm getting pulled out.
- FIG. 10 and FIG. 11 are diagrams showing a process liquid supply flow of the process liquid supply apparatus.
- step ST1 of FIG. 10 it is determined whether the lower limit sensor S2 of the supply tank 21 is ON. If NO (the processing liquid level is lower than the lower limit level), then the lower limit sensor S4 of the supply tank 22 is Determine whether or not it is ON (step ST2), and move to step 21 in Fig. 11 for both NO and Y ES. If YES in step ST1, it is determined whether the lower limit sensor S4 of the supply tank 22 is ON (step ST3) .If NO, the process proceeds to step ST24 in Fig. 11. If YES, Move to step ST27 in Fig. 11.
- step ST21 of Fig. 11 the pressure relief valve V 3 is closed, and then the treatment liquid L is supplied to the supply tank 21 and the inert gas supply valve V 2 is opened to supply the inert gas.
- V 7 and valve V 9 are opened to supply the processing liquid to the substrate processing unit 3 (step ST 22).
- step ST 26 the inert gas supply valve V 2 and the valve V 7 are closed, and the supply of the processing liquid L from the supply tank 21 is stopped (step ST 26).
- step ST 27 the pressure relief valve V 3 is opened to depressurize the supply tank 21 (step ST 27).
- step ST 28 the processing liquid supply valve V 1 is opened to supply the processing tank L to the supply tank 21 (step ST 28).
- step ST29 it is determined whether the upper limit sensor S1 of the supply tank 21 is ON (step ST29). If YES, the processing liquid supply valve V1 is closed to stop the supply of the processing liquid to the supply tank 21 (step ST 30). Subsequently, it is determined whether the lower limit sensor S 4 of the supply tank 22 is ON (step ST 3 1). If NO, the process waits until it is ON. If YES, the process proceeds to step ST 21.
- step ST3 2 If the lower limit sensor S2 of the supply tank 21 is not ON in step ST23 above, then it is determined whether the lower limit sensor S4 of the supply tank 22 is ON (step ST3 2). Then, return to the above step ST 23, and if YES, open the pressure relief valve V 6 and depressurize the supply tank 22. Subsequently, the processing liquid supply valve V 4 is opened, and the processing liquid is supplied to the supply tank 22 (step ST 3 4). Next, it is determined whether the upper limit sensor S3 of the supply tank 22 is ON (step ST3 5). If NO, wait until it is ON. If YES, close the processing liquid supply valve V4 and close the supply tank. 2 Stop supplying processing solution to 2 and proceed to step ST 23 above.
- a plurality of (two in the figure) tanks are provided for each of the processing liquids to be supplied as described above, and the processing liquid is supplied to the substrate processing unit 3 in one of the supply tanks 2 1 and 2 2, for example, the supply tank 2 1.
- the processing liquid in supply tank 2 1 runs out, it switches to supply tank 2 2 by switching the valve.
- the supply of the processing liquid to the supply tank 21 is performed.
- the treatment liquid can be continuously supplied.
- the two supply tanks 2 1 and 2 2 2 are used alternately, the process is not interrupted, and the capacity of the supply tanks 2 1 and 2 2 can be suppressed to the minimum necessary level. For this reason, the treatment liquid supply apparatus can be made very compact, and even if it is installed in the apparatus, it is possible to minimize the influence on the apparatus footprint.
- the substrate processing units 3 mounted on the substrate cleaning processing apparatus at least one, preferably all of the substrate processing units are a single substrate processing unit that can complete the process, that is, after the liquid processing. It has a drying function.
- a plurality of nozzles that spray an inert gas (eg N 2 gas) on the front and back surfaces of the substrate are installed independently above and below, and liquid processing such as double-sided cleaning, bevel etching, and backside scrubbing is complete.
- the substrate is dried by spraying an inert gas on both sides of the substrate.
- a low-cost substrate transfer device that can handle only dry specifications and does not require wet countermeasures. For example, it can be supported by a fixed mouth pot with multiple dry hands.
- FIG. 12 is a cross-sectional view showing an embodiment of the substrate processing unit 3-1.
- Substrate processing Unit 3-1 comprises chamber 3 1.
- the chamber 31 includes a cylindrical chamber body 3 2 and a chamber cover 33 that covers the upper end of the chamber body 3 2.
- the cylindrical chamber body 3 2 is erected in the vertical direction, and the lower side is closed by the bottom 3 4.
- the chamber cover 33 is formed in a bowl-like shape and covers the upper end of the cylindrical chamber body 32.
- the upper end of the chamber body 32 and the outer periphery of the chamber cover 33 are in close contact so that the inside of the chamber 31 can be sealed from the outside air.
- the bottom part 3 4 is slightly inclined with respect to the horizontal. At the connection part between the bottom part 3 4, which is the lowest part of the inclined surface, and the chamber body 3 2, the chamber body 3 2 is subjected to exhaust and drainage.
- the exhaust / drain pipe 4 9 also serves as a connection.
- An opening is formed at the center of the chamber cover 33, and an upper shaft 35 is provided through the opening in the vertical direction.
- the upper shaft 35 has a disc-shaped flange 3 at its upper end. 5 has a.
- the opening of the chamber cover 33 and the flange portion 35 a are connected by a bellows (bellows-shaped) flexible joint 36.
- a conduit 37 is formed through the center of the upper shaft 35.
- the conduit 37 supplies gas for purging oxygen such as nitrogen gas or rinsing ultrapure water to the substrate surface.
- the tip of the conduit 37 is formed as a nozzle 37 a for the substrate W.
- the chamber cover 33 and the upper shaft 35 are connected by a connecting member (not shown), and the relative position in the vertical direction of both can be adjusted.
- This connecting member includes a driving device (not shown) that drives the upper shaft 35 relative to the chamber cover 33 to adjust the relative position. As described above, since the flexible joint 36 is provided, the relative positional relationship between the chamber cover 33 and the upper shaft 35 can be accommodated.
- the upper disk 3 8 which is a circular flat plate is horizontally attached to the lower end of the chamber upper shaft 35.
- the lower surface of the upper disk 38 is configured to face the surface of the circular substrate W to be processed in parallel.
- the gap between the lower surface of the upper disk 3 8 and the surface of the substrate W is as narrow as possible. For example, it adjusts suitably in the range of 0.5-20 mm.
- the gap is preferably about 0.8 to 10 mm, more preferably about 1 to 4 mm, and nitrogen gas and ultrapure water supplied through the conduit 37 are even on the surface of the substrate W. To flow into.
- This gap adjustment is performed by adjusting the relative position between the upper shaft 35 and the chamber cover 33. It can be done by adjusting.
- Each of the six rollers 3 9 a to 3 9 f rotates the substrate W by rotating. It is only necessary to obtain uniform rotation at low speed while supporting the horizontal, and the rotation speed is 30 O mir 1 at the maximum.
- a chamber lower shaft 40 is erected on the bottom 34 so as to be positioned on the back side of the substrate W supported by the rollers 39a to 39f.
- a nozzle 4 1 a formed by a conduit 41 passing therethrough is formed.
- a lower disk 42 which is a circular flat plate, is arranged on the upper end of the lower shaft of the champ 40 so as to face the back side of the substrate W supported by the rollers 39a to 39f in parallel with the back side of the substrate W. Is attached.
- the gap between the lower disk 42 and the back surface of the substrate W is preferably as narrow as possible, as in the relationship between the upper disk 38 and the substrate W. For example, the range is 0.5 to 20 mm. Adjust as appropriate.
- This gap is preferably about 1 to 4 mm so that nitrogen gas or ultrapure water supplied via the conduit 41 flows uniformly through the gap between the back surface of the substrate W and the lower disk 42.
- the substrate can be processed or protected with a relatively small amount of fluid.
- FIG. 13A is a perspective view showing the relationship between the substrate W supported by the rollers 39a to 39f and the etching portion 45
- FIG.13B is a side view of the etching portion 45
- 1 3 C is a plan view of the etched portion.
- the etching portion 45 is a U-shaped member formed so as to sandwich the peripheral portion of the substrate W from the front and back sides with a gap.
- a gas introduction pipe 46a such as nitrogen gas for drying the substrate W in order from the downstream side along the rotation direction of the substrate W
- An ultrapure water introduction pipe 46 b for rinsing for cleaning the substrate W is connected to a chemical introduction pipe 46 c such as hydrofluoric acid as a first liquid for etching the metal thin film formed on the bevel.
- a chemical introduction pipe 46 c such as hydrofluoric acid as a first liquid for etching the metal thin film formed on the bevel.
- the chemical solution supplied from the chemical solution introduction pipe 4 6 c is a mineral acid or organic acid and / or an oxidizing agent as an etching solution.
- the organic acid is acetic acid, formic acid, oxalic acid, etc., and the chemical solution contains at least one of them.
- the oxidizing agent is hydrogen peroxide (H 2 0 2 ) water, ozone (0 3 ) water, or the like, and includes at least one of them.
- a solenoid valve S V 1 that is an on-off valve that supplies acid and a solenoid node S V 2 that is an on-off valve that supplies an oxidizing agent are arranged in parallel on the upstream side of the chemical solution introduction pipe 46c.
- the acid conduit via the solenoid S V 1 and the oxidizer conduit via the solenoid valve S V 2 merge into the chemical introduction pipe 46c.
- the solenoid valve S V I and the solenoid valve S V 2 are controlled to open and close by the controller 50.
- the controller 50 controls the opening / closing time and the opening / closing sequence of the solenoid valve S V 1 and the solenoid valve S V 2.
- the type and concentration of the acid are selected as appropriate, the order of the acid and oxidant supplied to the etching section 45 and the respective supply times are set by the controller 50, and the acid Oxidizing agent can be supplied alternately.
- the controller 50 can also select to supply the acid and the oxidizing agent in a mixed state at the same time. If a control valve is used instead of a solenoid valve that can only be fully opened and fully closed, the flow rate of acid and oxidizer can be adjusted to set the mixing ratio to an arbitrary value.
- the ultrapure water introduction pipe 4 6 b supplies ultrapure water for washing.
- the inert gas (N 2 gas or Ar gas) for drying is supplied from the gas introduction pipe.
- the lower cantilever part 45 c of the etching part 45 is passed through the lower cantilever part 45 c from the inside of the U-shape, and the waste liquid of chemicals and ultrapure water is discharged from the chamber 31. Drainage pipes 4 to 7 are connected.
- an air cylinder 48 is installed on the outer side of the U-shaped portion of the etched portion 45, and the etched portion 45 is moved toward and away from the substrate W "via the shaft (the direction indicated by the arrow A in the figure). In this way, the etching unit 45 has a structure that can be retracted when the substrate W is carried in and out.
- FIGS. 14A and 14B are diagrams showing an embodiment of another substrate processing unit 3-2 that performs a bevel etching process on the substrate W.
- FIG. 1 4 A the substrate processing unit 3-1 roller 3 9 a to 3 9 during the etching process of the bevel part of the substrate W While rotating the substrate W by the same roller 63 as in f, the upper disk 60 descends to a position of several millimeters above the substrate W, and the inert gas (N 2 (Gas, etc.) 6 1 is sprayed and blown toward the outer periphery of the substrate W so that the processing liquid sprayed from the etching nozzle 58 or the vapor of the processing liquid does not enter the center of the substrate W.
- N 2 (Gas, etc.) 6 1 the inert gas
- pure water is supplied from the rinse nozzle 59 to the edge portion of the rotating substrate W (positioned so that pure water is supplied from the inside of the processing liquid supply position), and rinsing is performed.
- the injection nozzles 64, 65 and / or the central part 60a of the upper disk 60 are not provided from the outer peripheral part of the upper disk 60.
- the active gas 6 1, 6 1 is irradiated onto the rotating substrate W.
- the injection nozzle 6 4 injects the inert gas 61 toward the surface of the substrate W located outside the upper disk 60, and the injection nozzle 65 has the inert gas 61 from the inside toward the outside. It comes to inject.
- an inert gas 61 is injected from the injection nozzle 65 from the inside, and then an inert gas is injected from the injection nozzle 64 to the outside.
- the etching part has a bevel suction nose 6 2 sucked from the upper surface of the peripheral part of the substrate W, and a suction nozzle 6 6 having a U-shaped cross section and sucking from the side of the peripheral part of the substrate W.
- the nozzle 62 and the suction nozzle 66 suck the gas 69 containing inert gas and liquid mist flowing into the bevel portion during drying. Further, the inert gas 61 is sprayed from the spray nozzle 67 to the back surface of the substrate W.
- the injection nozzle 67 moves from the center of the substrate W to the outer peripheral portion while injecting the inert gas 61 as indicated by an arrow A.
- a suction nozzle 6 8 is provided in the vicinity of the outer side of the roller 6 3 so as to suck inactive gas 61 flowing into the surface of the roller 63 and gas 69 containing liquid mist. As a result, the surface of the roller 63 is also dried.
- a plurality of pairs of jet nozzles 6 4 and 65 may be arranged around the upper disk 60 at equal intervals.
- the injection nozzles 6 4 and 65 are arranged at different positions on the same radius, but may be arranged at different radial positions on different radii.
- the etching nozzle 5 8 or the nozzle 5 9 is separated from the bevel arch I nozzle 6 2 in FIG. 14 A, but may be adjacent to the etching nozzle 5 8 from the processing nozzle or rinse nozzle 5 9 Further, pure water may be supplied from the liquid and each liquid may be sucked by the bevel suction nozzle 62.
- the bevel suction nozzle 6 2 is positioned before the nozzles 5 8 and 5 9, suction is performed immediately after supplying the liquid, and the bevel suction nozzle 6 2 is nozzles 5 8 and 5.
- Substrate W sucks after one round.
- the reaction time with the liquid can be adjusted, and the amount of liquid used, etching, and uniformity of rinsing can be controlled.
- the back surface processing cleaning may be performed at the same time.
- FIG. 15 is a diagram showing an embodiment of the substrate processing unit 3-3 for drying the substrate W after performing the double-sided cleaning process on the substrate W.
- gas injection nozzles 7 1 and 7 2 for injecting inert gas 6 1 and 6 1 on the front and back surfaces of the substrate W
- Inert gas 61, 61 is sprayed onto the front and back surfaces of the rotating substrate W by four rollers 63, which are equally arranged around the substrate as in ⁇ 39 f.
- the gas injection nozzles 7 1 and 7 2 are moved from the center portion of the substrate W toward the outer peripheral portion as indicated by arrows B and B. As a result, the drying region of the substrate W is dried while spreading from the central portion to the outer peripheral portion.
- gas 69 including an inert gas or liquid mist flowing into the bevel during drying is sucked by suction nozzle 66.
- Gas 6 9 containing inert 14 gas and liquid mist flowing into the surface of roller 63 is also sucked by suction nozzle 68.
- the chamber 7 3 has a box shape with a substantially square cross section, and the top plate 7 3 a (lid) can be opened and closed. When the top plate 7 3 a is closed, liquid does not scatter from the side wall to the outside. It has become.
- the top plate 7 3 a is provided with two concentric arcuate openings (air intakes) 7 4 as shown in Fig. 17, while the bottom 7 3 b has two exhaust ports 7 9 are provided opposite to each other across the center, which leads to the exhaust duct 10. As shown in FIG. 18, the bottom 7 3 b is inclined, and a drain port 75 is formed on the lower side.
- a substrate holding part 76 for holding the substrate W in a rotatable manner is provided in the chamber 73.
- the substrate holder 7 6 includes four rollers 7 7 that hold the substrate W horizontally and rotate it. As shown in Fig. 8, the lower end of roller 7 7 and the opening of bottom 7 3 b
- An accordion-shaped covering member 78 is provided between the periphery of the mouth portion, and shuts off the inside of the chamber 73 and the space below the chamber 73.
- each roller 77 is configured to move toward the center C of the substrate W along the radial direction of the substrate W.
- Each roller 7 7 is connected to an air cylinder 8 1 as a driving mechanism, and the air cylinder 8 1 moves each roller 7 7 along the radial direction of the substrate W. It comes in contact with and separates from.
- These rollers 77 are arranged at equal intervals in the circumferential direction of the substrate W.
- the rollers 77 are connected to a motor (not shown) as a drive source, and by driving the motors, the rollers 77 are rotated in the same direction in synchronization.
- a stopper 81a is provided to stop the movement of the roller 77 contacting the half area of the substrate W divided in half by the center line CL.
- the roller 7 7 receives the first pressing force from the air cylinder 8 1 and moves toward the center C of the substrate W until it comes into contact with the stopper 8 1 a and moves to a predetermined position determined by the stopper 8 1 a. Fixed.
- the roller 77 located on the other side of the substrate W receives a second pressing force smaller than the first pressing force from the air cylinder 81, and the movement of the substrate W is not restricted. Move once to center C.
- FIG. 21 is an enlarged sectional view showing a main part of the roller 77 shown in FIG.
- a groove-shaped clamp portion 82 extending along the outer peripheral surface of each roller 77 is formed.
- the clamp portion 8 2 has a flat portion 8 2 a located at the center thereof and two curved portions 8 2 b adjacent to the upper and lower sides of the flat portion 8 2 a. It has an arcuate cross section. In such a configuration, when the roller 77 moves toward the substrate W, the clamp portion 82 is flat so as to accommodate a portion that is directed from the end of the substrate W to the inner peripheral side by about 0.1 mm to several mm.
- the part 8 2 a contacts the end of the substrate W.
- These rollers 77 have the same shape and the same size. Further, as the material of the roller 77, a fluorine-based resin having chemical resistance, such as PVDF, PEEEK, or polyurethane, is preferably used.
- the width (length in the vertical direction) E of the clamp part 8 2 is less than twice the thickness T of the substrate W. Specifically, for substrate W with a diameter of 200 mm and a thickness of 0.75 mm Then, the width E of the clamp part 82 is set to 1.5 mm or less. The width (length in the vertical direction) F of the flat portion 8 2 a is less than half of the thickness T of the substrate W. With such a configuration, the substrate W held by the clamp portion 82 is restricted to the position of the flat portion 82a by the curved portion 82b. Therefore, the substrate W can be rotated while keeping the posture of the substrate W substantially constant.
- the substrate holder 7 6 includes a height adjusting mechanism (not shown) for adjusting the height of each roller 7 7 and an inclination adjusting mechanism (not shown) for adjusting the inclination of each roller 7 7.
- a height adjusting mechanism for adjusting the height of each roller 7 7
- an inclination adjusting mechanism for adjusting the inclination of each roller 7 7.
- the roller 77 is provided with a roller force par 8 3 that covers the roller 7 7 as a whole.
- the roller cover 8 3 has a cylindrical shape that matches the shape of the roller 7 7, the top is covered with the top plate 8 3 a, and the lower end opens into the chamber 7 3, either directly or indirectly. It is attached to the base that holds the shaft.
- b is formed.
- the vertical and horizontal dimensions of the opening 8 3 b are formed to the minimum size so that the roller 7 7 does not interfere with holding the substrate W as shown in FIGS.
- roller cover 8 3 Since the space in the roller cover 8 3 opens downward, the air flow is formed downward by the exhaust from the exhaust port 79, and the droplets and mist that enter from the opening 8 3 b To be discharged downward. Since this roller cover 8 3 has a top plate 8 3 a, it prevents the processing liquid and the like scattered from the substrate W from adhering to the roller 7 7, and prevents the roller 7 7 itself from becoming a contamination source. To prevent.
- the space inside the roller cover 83 may be exhausted through a path different from the path of the exhaust port 79 in the chamber 73.
- the chamber 73 is provided with a processing liquid supply nozzle 84 that ejects various processing liquids toward the substrate W held by the rollers 77. These are arranged so that an appropriate processing solution can be sprayed to an appropriate location on the substrate W according to the type of processing to be performed. It can be moved so that it can be saved at a position away from the station.
- a processing solution supply nozzle 84 for supplying a etching solution and pure water for cleaning is provided in order to bet the substrate W (semiconductor wafer). This is composed of an L-shaped tube that hangs down from the top plate 8 3 a. As can be seen in 2 and 3, the orientation of the nozzle at the end of the horizontal pipe can be changed.
- a treatment liquid supply nozzle 84 for supplying pure water for cleaning is also provided on the lower surface side of the substrate W (not shown).
- an inert gas is used.
- a gas injection nozzle 72 for injecting (N 2 ) or the like is arranged toward an appropriate portion of the substrate W. These can also be moved to inject gas to different locations on the substrate W surface and to evacuate when not in use.
- These gas injection nozzles 72 are provided with a nozzle cover 85 that prevents contamination and clogging due to adhesion of the scattering treatment liquid when not in use.
- the nozzle cover 85 is a cap-like one.
- the nozzle cover 8 5 is always installed at the retracted position, and the gas injection nozzle 7 2 is raised using the lifting mechanism at the retracted position so that the nozzle tip is inserted into the cover. It has become.
- the nozzle cover 85 may move or move up and down, or it may move together with the nozzle.
- the nozzle cover 85 is installed according to the injection direction of each gas injection nozzle 72. Note that the gas injection nozzle 72 desirably sprays a small amount of gas during movement to prevent the treatment liquid from adhering. In this example, the lower gas spray nozzle
- the chamber 73 is provided with a purge member 86 for controlling the flow of the processing solution and mist when the substrate W is processed, attached to the chamber 7 3 top plate 7 3 a.
- the purge member 8 6 includes a head portion 8 6 a fixed to the top plate 7 3 a and a disk-shaped fixing fixed to the lower surface of the head portion 8 6 a.
- a purge plate 8 6 b and a movable purge plate 8 6 c provided on the outside thereof so as to be movable up and down are provided. Movable purge plate
- the lifting mechanism 8 7 includes a fluid pressure cylinder 8 7 a erected on the top surface of the top plate 7 3 a, a triangular holding plate 8 7 b attached to the upper end of the fluid pressure cylinder 8 7 a, and its holding It has a rod-shaped connecting member 8 7 c that connects the edge of the plate 8 7 b and the movable purge plate 8 6 c.
- the movable purge plate 8 6 c is raised by the operation of the fluid pressure cylinder 8 7 a to expose the peripheral portion of the substrate W. In the lowered position, it is integrated with the fixed purge plate 8 6 b.
- a seal member 8 8 is disposed between the surfaces where the movable purge plate 8 6 c and the fixed purge plate 8 6 b are in contact with each other, so that gas does not leak from this gap.
- a protruding wall 89 that is slightly larger than the outer diameter of the substrate W is formed at the edge of the movable purge plate 8 6 c so that the upper surface and the side surface of the substrate W can be covered with a minute gap. It has become.
- the fixed purge plate 8 6 b and the movable purge plate 8 6 c have measures such as forming a recess in the corresponding part so as not to interfere with other members such as the rollers 77 7.
- the fixed purge plate 8 6 b is provided with two gas flow paths 90 a and 9 Ob for supplying gas toward the gap between the substrate W surface.
- the first gas flow path 90 a extends vertically along the central axis, and opens as a space whose diameter increases toward the substrate W surface at the center of the upper surface of the substrate W. Gas is supplied to the part.
- the second gas flow path 9 Ob opens at the peripheral edge of the substrate W, that is, from the outer end of the substrate W to an annular portion having a predetermined width. This mainly supplies gas to the peripheral edge of the substrate W. A fluid is supplied to these gas flow paths 90 a and 90 b through a joint protruding to the upper surface side of the chamber 73.
- the chamber 73 is provided with an inner wall cleaning nozzle 91 that opens to face the inner wall portion 73c.
- the inner wall cleaning nozzle 91 is provided at equal intervals in the pipe 92 provided along the inner wall portion 73c of the chamber 73 toward the diagonally lower side.
- This pipe 92 is connected to a cleaning liquid supply system via an on-off valve 93 that is controlled to be opened and closed by the control system. By opening the on-off valve 93 at a predetermined timing, the inner wall 7 3 c Automatic cleaning (self-cleaning) is performed.
- self-cleaning is performed every one or several sheets when the substrate W is not in the chamber 73, that is, when waiting for the transfer of the substrate W, etc. To do. Of course, it may be performed during the treatment by lowering the spraying pressure of the cleaning liquid.
- the height position of the inner wall cleaning nozzle 91 is selected as appropriate, but it is preferable to target the place where the processing liquid is likely to adhere, that is, the vicinity of the processing height of the substrate W and the range below it.
- the substrate processing unit 3-4 having the above configuration, a process of etching the bevel portion that is the peripheral portion of the substrate W will be described.
- the substrate W is loaded by the transfer robot 2.
- the roller 7 7 retracted, the substrate W is maintained at the height of the clamp portion 82 2, and the roller 7 7 is moved inward to hold the substrate W.
- the purge member 86 covers the substrate W as shown in FIG.
- the air inlet 74 is formed along the peripheral edge above the substrate W, the air flow in the chamber 73 is formed so as to wrap the substrate W from the top to the bottom. Accordingly, an air curtain A 10 that surrounds the substrate W is formed to prevent contamination by fine particles from the top plate 7 3 a of the chamber 7 3, the inner wall, or other parts.
- clean gas is supplied from the gas flow paths 90a, 90b of the purge member 86, and this also protects the substrate W surface. In the absence of the purge member 8 6, the airflow directly protects the substrate W surface.
- the movable purge plate 86c is raised, and the peripheral edge of the substrate W is exposed.
- the processing liquid supply nozzle 84 is sprayed toward the corresponding portion while driving the roller 7 7 to rotate the substrate W at a low speed.
- an inert gas N 2 gas or the like
- N 2 gas or the like is supplied to the first gas flow path 90 a to form a flow from the center toward the outer periphery on the surface of the substrate W.
- a cleaning liquid such as pure water is supplied from the processing liquid supply nozzle 84 to remove the etching liquid.
- an inert gas (such as N 2 gas) is supplied to the first gas flow path 90 a to prevent liquid from entering the inner part.
- the cleaning liquid is also supplied to the back side of the substrate W to clean the back side.
- the cleaning liquid is removed from the substrate W surface, and further a drying process is performed.
- supply of the cleaning liquid is stopped, and the rotation speed of the substrate W is maintained or increased, and the liquid is scattered by centrifugal force.
- the inert gas is supplied not only to the first gas flow path 90a but also to the second gas flow path 90b.
- the gas injection from the first gas flow path 90a is for preventing the liquid from entering the inner part, and the gas injection from the second gas flow path 90b is the liquid remaining in the peripheral part. It is for blowing away.
- the movable purge plate 86c is lowered to cover the peripheral edge of the substrate W.
- a high-speed flow of the inert gas can be formed along the peripheral surface of the substrate W, and the removal of the liquid, that is, the drying is performed quickly. In this drying process, the rotation speed of the substrate W is reduced or stopped.
- gas is also supplied from the gas injection nozzle 72 on the back side of the substrate W, and the liquid is removed and dried.
- the gas injection nozzle 72 moves to the retracted position while injecting a small amount of gas, as shown in Fig. 24 B, and ascends as shown in Fig. 24 C. Ahead in 5 Wait with the edges closed.
- the processed substrate W is unloaded by the transfer robot with the top plate 7 3 a opened, and a new substrate W is loaded, and the next processing is performed.
- the inner wall cleaning nozzle 91 shown in FIGS. 25A and 25B performs automatic cleaning (self-tapping) of the inner wall portion 73c at an appropriate timing.
- etching, cleaning, and liquid removal / drying are performed in the same equipment, so each part of the equipment contaminated by the etching and cleaning process contaminates the substrate W during liquid removal / drying or later.
- the prevention of so-called secondary contamination is an important issue.
- a plurality of means as described above are provided in order to prevent secondary contamination.
- the processing liquid is fed from the substrate W and the nozzle being processed by the processing liquid by the air curtain formed so as to wrap the substrate W evenly by the air intakes 74 provided symmetrically with respect to the substrate W.
- the surrounding members are prevented or reduced from scattering on the inner wall, and contamination of these parts is prevented or reduced.
- the air curtain prevents contamination between the inner wall of the peripheral member and the substrate W. Therefore, secondary pollution is prevented or reduced in a double sense.
- FIG. 27 shows an embodiment in which the opening area and shape can be easily changed. That is, an adjustment member 94 having an edge that follows the shape of the air intake 7 4 is attached to the top surface of the top plate 7 3 a so as to partially cover each air intake 7 4 It is. Between the top plate 7 3 a and the adjusting member 9 4, a position adjusting mechanism 95 is provided by a combination of the convex portion 95 a and the long hole 95 b. Using this position adjusting mechanism 95, the position of the two adjusting members 94 can be adjusted while maintaining symmetry with respect to the substrate W.
- the adjustment member 94 may be fixed by forming a screw on the convex portion 95a and screwing a nut into the protrusion 95a. Further, the shape of the air intake port 74 may be changed by exchanging it with an adjustment member 94 having an edge of another shape.
- the roller 7 7 that directly contacts the substrate W is covered by the roller cover 8 3
- the adhesion of the processing liquid to the roller 7 7 is reduced, and secondary contamination through the roller 7 7 is reduced.
- the covering action of the top plate 7 3 a covering the top of the roller 77 is effective.
- FIGS. 2A and 2B show a cover cleaning mechanism 9 6 for cleaning the roller cover 8 3 in the retracted position of the roller 7 7.
- the pipe 9 2 through the pipe 9 6 a of the inner wall cleaning nozzle 9 1 shown in FIGS. 25 A and 25 B are introduced above the opening 8 3 b of the roller cover 8 3, A cover cleaning nozzle 9 6 b is formed on this.
- the timing of use may be basically the same as the self-cleaning of the inner wall 7 3 c, but is not limited to this.
- the cover cleaning mechanism 9 6 is not limited to this, for example, the roller cover 8 3 itself
- a nozzle for injecting the cleaning liquid from the inside of the opening 83b may be provided.
- the nozzle cover 85 prevents or reduces contamination when the gas injection nozzle 72 is in the retracted position. Therefore, the situation where the gas for injection is injected from the contaminated gas injection nozzle 72 is avoided, and secondary contamination is prevented or reduced.
- the inner wall cleaning nozzle 91 performs self-cleaning of the inner wall portion 7 3 c, a path 2 in which fine particles caused by the processing liquid and the like adhering to the inner wall portion 7 3 c reattach to the substrate W is provided. Prevent or reduce secondary contamination.
- a method of arranging a holding part suction part for sucking the processing fluid in the substrate holding part as described below may be used in combination. This is because the treatment liquid can be prevented from adhering to the substrate holding portion, and the reattachment of the fine particles to the substrate W due to the adhesion can be prevented or reduced.
- FIG. 29 is a perspective view schematically showing a substrate processing tube 3-5 according to another embodiment of the present invention.
- the substrate processing unit 3-5 includes a plurality (four in this embodiment) of substrate holding units 1 1 1 and each substrate holding unit 1 1 1 A roller 1 2 0 rotating around the axis is provided.
- a bevel suction nozzle (peripheral suction portion) 1 1 6 is arranged above the substrate W.
- the bevel suction nozzle 1 16 is close to the peripheral edge of the substrate W, and sucks liquid from the peripheral edge of the substrate W.
- FIG. 30A and FIG. 30B are diagrams showing an embodiment of the substrate holder 1 1 1.
- Substrate holding part (rotating holding part) 1 1 1 for holding the substrate is equipped with rollers 1 2 0 each having a clamping part 1 2 1, and the clamping part 1 2 1 is the end of the substrate W and the substrate W
- the substrate holding part 1 1 1 is brought into contact with a predetermined pressing force toward substantially the center of the substrate, and all substrate holding parts 1 1 1 1 are rotated in the same direction and in the same direction by a rotation driving means (not shown).
- the substrate W is held while applying a rotational force by friction between the edge of the substrate W and the edge of the substrate W. At least one of all the substrate holders 1 1 1 may be driven to rotate.
- a holding part suction nozzle 1 2 4 with 2 3 is arranged.
- the suction port 1 2 3 is disposed close to the clamp portion 1 2 1, for example, in the vicinity of 5 mm or less, and sucks the fluid adhering to the clamp portion 1 2 1.
- a holding unit cleaning nozzle 1 26 having a supply port 1 25 for supplying a cleaning fluid to the clamp unit 1 2 1 is similarly disposed in the vicinity of the clamp unit 1 2 1 of the roller 1 2.
- the material used for the roller 120 here is PVDF, which is a chemical-resistant fluororesin.
- the spin chuck holds the substrate fixed, it is difficult for the fluid to change inside the spin chuck claw.
- the substrate holding part 1 1 1 1 by rotating and holding the substrate W by the substrate holding part 1 1 1 and installing the holding part suction part 1 2 4 in the substrate holding part 1 1 1, the vicinity of the substrate holding part 1 1 1 It is possible to improve the replacement of the fluid and suppress the residual fluid.
- the clamp portion 1 2 1 of the substrate holding portion 1 1 1 comes into contact with the end portion of the substrate W and presses and holds the predetermined pressure substrate W toward the inside of the substrate W.
- the shape of the clamp portion 1 2 1 is preferably a concave shape so that there is no displacement of the substrate W during holding or rotation.
- the clearance between the holding part suction nozzle 1 24 and the clamp part 1 2 1 is preferably 1 mm or less, and more preferably 0.5 mm or less.
- the material for the roller 120 is preferably a fluorine resin having chemical resistance, such as PVDF, PEEK, or polyurethane.
- the clearance (positional relationship) between the holding unit cleaning nozzle 1 2 6 and the clamp unit 1 2 1 is preferably less than l mm, more preferably the same as the clearance between the holding unit suction nozzle 1 2 4 and the clamp unit 1 2 1 Is 0.5 mm or less.
- the fluid adhering to the clamp part 1 2 1 re-contacts with the substrate W by the rotation of the roller 1 2 0, and the fluid in the tangential direction X of the substrate W and the roller 1 2 0 (See Figure 3 OA).
- the relationship between the suction port 1 2 3 and the supply port 1 2 5 is that if the rotation direction of the roller 1 2 0 is the direction of the arrow in the figure, the clamp part 1 2 1 and the substrate W A holding part cleaning nozzle / res 1 2 6 is arranged in front of the contact part Wc in the rotational direction, and a holding part suction nozzle 1 2 4 having a suction port 1 2 3 is arranged in front of it. Yes.
- the fluid at the peripheral edge of the substrate W moves to the clamp part 1 2 1 of the roller 1 2 0 at the contact part W c, and the roller 1 2 0 rotates in the direction indicated by the arrow in the figure, and the holding part cleaning nozzle 1 26 6 Cleaning fluid supply port 1 2 1
- the clamp part 1 2 1 to which the fluid adheres is cleaned by the cleaning fluid supplied from the 2 5.
- the fluid processed by the cleaning fluid reaches the holding part suction nozzle 1 2 4 having the suction port 1 2 3 as the roller 1 2 0 rotates, the fluid is sucked by the suction nozzle 1 2 4. Sucked.
- the scattering of fluid from the peripheral edge of the substrate W is suppressed, and the substrate is contaminated.
- the suction pipe 1 2 7 is provided inside the roller 1 20, and flows from one or a plurality of locations of the clamp part 1 2 1 through the suction pipe 1 2 7. The body may be sucked.
- the holding unit cleaning nozzle 1 26 is provided has been described. However, when the cleaning process is not necessary, the provision of the holding unit cleaning nozzle 1 26 can be omitted.
- the suction port 1 2 3 of the holding part suction nozzle 1 2 4 and the suction pipe 1 2 7 communicate with a vacuum source via a gas-liquid separator, and suck fluid or the like by vacuum suction.
- a vacuum source an ejector or a vacuum pump is used.
- the holding unit cleaning nozzle 1 2 6 and the holding part suction nozzle 1 2 4 may be arranged at a position away from the substrate W. That is, the holding part cleaning nozzle 1 2 6 and the holding part suction nozzle 1 2 4 may be disposed on the opposite side of the contact part W c with respect to the center of the roller 1 2.
- the roller 1 2 0 When the fluid on the substrate W is sucked with the bevel suction nozzle 1 1 6 or the suction nozzle (not shown), the roller 1 2 0 does not necessarily have to be cleaned, so the holding unit cleaning nozzle 1 2 6 may be omitted. it can.
- the holding unit suction nozzle 1 2 4 is disposed on the contact point between the roller 1 20 and the substrate W, and is disposed in front of the contact unit Wc in the rotation direction. It is preferable. Furthermore, in this case, it is preferable that the suction port 1 2 3 of the holding unit suction nozzle 1 2 4 opens toward the contact part W c and is disposed close to the contact part W c.
- the holding part suction nozzle 1 2 4 may be arranged so that the suction port 1 2 3 is always in contact with the fluid accumulated in the contact part Wc.
- the bevel suction nozzle 116 has a conductive portion 151 formed from a conductive material.
- This conductive part 15 1 is located at the tip of the bevel suction nozzle 1 1 6 and is grounded (grounded) via wiring 1 4 7.
- a force in which only a part of the bevel suction nozzle 16 is formed from a conductive material may be formed from the conductive material.
- a bevel suction nozzle may also be provided on the lower surface side of the substrate W.
- the holding part suction nozzle 1 2 4 has a conductive part 1 5 2 formed of a conductive material. This conductive part 1 5 2 is located at the tip of the holding part suction nozzle 1 2 4 Grounded via 148.
- a part of the holding unit suction nozzle 124 is formed from a conductive material, but the entire holding unit suction nozzle 124 may be formed from a conductive material.
- At least one of 24 has the conductive portion 152.
- a gas supply nozzle 113 that supplies a drying gas to the upper surface of the substrate W is disposed above the substrate W, and a gas supply nozzle 114 that supplies a drying gas to the lower surface of the substrate W is disposed below the substrate W. Is arranged.
- the gas supply nozzles 113 and 114 extend substantially perpendicular to the substrate W, and a drying gas is blown from the respective gas supply nozzles 113 and 114 toward the upper and lower surfaces of the substrate W.
- the gas supply nozzle 113 is attached to the tip of the swing arm 135, and the swing arm 1
- the 35 oscillating shafts 135 a are connected to a drive source (moving mechanism) 137.
- the drive source 1 37 When the drive source 1 37 is operated, the swing arm 135 force S swings, and the gas supply nozzle 113 moves along the radial direction of the substrate W. Similar to the gas supply nozzle 113, the gas supply nozzle 114 is also attached to the tip of the peristaltic arm 136, and is connected to the drive source 138 via the swing shaft 136a. Then, by operating the drive source 138, the gas supply nozzle 114 moves along the radial direction of the substrate W.
- an inert gas such as N 2 gas is preferably used as the drying gas.
- the pressure of the drying gas supplied from the gas supply nozzles 113 and 114 is preferably 50 kPa to 350 kPa. If the pressure of the gas is too low, poor drying will occur even if the moving speed of the gas supply nozzle 113, 114 is slowed down. Also, if the gas pressure is too high, when the gas is jetted toward the liquid film, the droplets splash and adhere to the substrate W, generating a watermark. For this reason, the pressure of the gas supplied from the gas supply nozzles 113 and 114 is optimally 50 kPa to 350 kPa.
- Liquid supply nozzles 145 and 46 for supplying a predetermined liquid such as pure water to the substrate W are attached to the sliding arms 135 and 136, respectively. These liquid supply nozzles 145 and 46 extend substantially perpendicular to the substrate W in the same manner as the gas supply nozzles 113 and 114. Then, a predetermined liquid is supplied to the upper surface of the substrate W from the liquid supply nozzle 145 located above the substrate W, and a predetermined liquid is supplied to the lower surface of the substrate W from the liquid supply nozzle 146 located below the substrate W. Is to be supplied.
- the liquid supply nozzles 145 and 46 are arranged adjacent to the gas supply nozzles 113 and 114, and both the liquid supply nozzles 145 and 46 and the gas supply nozzles 113 and 114 move along the radial direction of the substrate W.
- FIGS. 3 1 A to 3 1 D Figures 3.1A through 31D are diagrams for explaining the positional relationship between the gas supply nozzle and the liquid supply nozzle shown in Figure 29.
- the liquid supply nozzle 1 4 5 is arranged on the radially outer side of the gas supply nozzle 1 1 3. That is, the liquid supply nozzle 1 45 is located outside the gas supply nozzle 1 13 in the radial direction of the substrate W. Since the liquid supply nozzle 1 4 5 and the gas supply nozzle 1 1 3 are fixed to the swing arm 1 3 5 (see Fig. 29), the liquid supply nozzle 1 4 5 and the gas supply nozzle 1 1 3 are It moves along the radial direction of the substrate W while drawing the circular orbit indicated by the arrow S while keeping the relative position of each other.
- the liquid supply nozzle 14 45 and the gas supply nozzle 11 13 move toward the peripheral edge of the substrate W, the liquid supply nozzle 14 45 is more than the gas supply nozzle 11 13 in the traveling direction. It will be located in the front.
- the distance in the radial direction of the substrate W between the liquid supply nozzle 1 4 5 and the gas supply nozzle 1 1 3 is preferably 10 to 30 mm, and in this embodiment is 20 mm. If the distance between the liquid supply nozzle 1 4 5 and the gas supply nozzle 1 1 3 is too close, the liquid supply nozzle 1 4 5 force will cause the supplied liquid to be affected by the gas from the gas supply nozzle 1 1 3 May scatter.
- the distance between the liquid supply nozzle 14 45 and the gas supply nozzle 1 13 is too far, a portion that is not protected by the liquid is generated on the surface of the substrate W. Therefore, the distance between the liquid supply nozzle 1 4 5 and the gas supply nozzle 1 1 3 is 1 0 mo! ⁇ 30 mm is optimal.
- the positional relationship between the liquid supply nozzle 1 46 and the gas supply nozzle 1 1 4 is the same as the positional relationship between the liquid supply nozzle 1 4 5 and the gas supply nozzle 1 1 3 described above. That is, as shown in FIGS. 3 1 B and 3 1 D, the liquid supply nozzle 14 6 is located outside the gas supply nozzle 1 14 in the radial direction of the substrate W.
- the distance between the liquid supply nozzle 14 6 and the gas supply nozzle 1 14 is preferably 10 to 30 mm, and is 20 mm in this embodiment.
- Two or more gas supply nozzles may be arranged above and below the substrate W, respectively, and two or more liquid supply nozzles may be arranged above and below the substrate W, respectively.
- each of the liquid supply nozzle and the gas supply nozzle is connected to the swing arm 1 3 5.
- the substrate W can be uniformly dried by extending to the peripheral portion at a degree. The same may be applied to the back surface of the substrate W.
- the liquid supply nozzle and the gas supply nozzle may be moved linearly from the central portion of the substrate W to the peripheral portion instead of being moved along the circular arc trajectory.
- the substrate processing unit 3-5 configured as described above.
- the substrate W a semiconductor wafer in which Cu and Low-k materials are formed on the upper surface and an oxide film is formed on the lower surface is used.
- the following operation example shows a case where the liquid is supplied to the substrate W only from the liquid supply nozzle 14 45 disposed above the substrate W.
- the substrate W is held by the roller 1 2 0 of the substrate holding unit 1 1 1 and the substrate W is rotated at a rotation speed of 35 min 1 .
- a rinsing liquid (pure water) as a processing liquid is supplied from the rinsing liquid supply nozzle 14 0 to the upper surface of the substrate W, and the rinsing liquid supply nozzles 1 4 1 A, 1 4 1 B are applied to the lower surface of the substrate W.
- a rinsing liquid (pure water) as a processing liquid is supplied, and a liquid film of pure water is formed on the upper and lower surfaces of the substrate W.
- the gas supply nozzles 1 1 3 and 1 1 4 and the liquid supply nozzles 1 4 5 and 4 6 are moved to the center of the substrate W. Then, at the same time or immediately before the supply of pure water from the rinsing liquid supply nozzles 1 4 0, 1 4 1 A, 1 4 1 B is stopped, the gas supply nozzles 1 1 3, 1 1 4 to 3 0 0 k Pa N 2 gas is supplied to the upper and lower surfaces of the substrate W, and pure water with a flow rate of 400 cc / min is supplied to the upper surface of the substrate W from the liquid supply nozzle 14 45.
- the rotation speed of the substrate W is increased to 80 min — 1 , and the gas supply nozzles 1 1 3 and 1 1 4 and the liquid supply nozzles 1 4 5 and 4 6 are moved toward the peripheral edge of the substrate W. Dry the upper and lower surfaces of the substrate W.
- the substrate W By supplying pure water while moving the liquid supply nozzle 1 45, a liquid film is formed on the upper surface of the substrate W, thereby protecting the upper surface of the substrate W.
- the N 2 gas supplied from the gas supply nozzle 1 1 3 moves the liquid film to the peripheral edge of the substrate W and dries the upper surface of the substrate W.
- the liquid film (pure water) that has moved to the periphery of the substrate W is sucked by the bevel suction nozzle 1 1 6 force. Further, the pure water moves from the substrate W to the roller 120 and is sucked by the holding unit suction nozzle 1 24.
- the substrate W can be dried without generating a watermark on the upper surface of the substrate W.
- the pure water on the substrate W is sucked from the bevel suction nozzle 1 1 6 and the holding part suction nozzle 1 2 4, the pure water and air are mixed and friction is generated, and static electricity is generated by the friction.
- the bevel suction nozzle 1 1 6 and the holding part suction nozzle 1 2 Since 4 is grounded via the conductive parts 151 and 152, respectively, 'it is possible to prevent the substrate W from being charged by static electricity. Therefore, adverse effects due to static electricity on the circuit formed on the upper surface of the substrate W can be eliminated, and the yield can be improved.
- at least a part of the substrate holding part 111 (roller 120) may be formed of a conductive material and grounded. Even in this case, static electricity can be removed.
- the liquid is supplied only from the liquid supply nozzle 145 on the upper surface side of the substrate W.
- the liquid supply nozzle 146 on the lower surface side of the substrate W is also used.
- the liquid may be supplied to the lower surface of the substrate W.
- the gas supply nozzle 113 on the upper surface side and the gas supply nozzle 114 on the lower surface side move at different speeds so as to reach the peripheral portion of the substrate W at the same time. Let By doing so, drying of the upper surface and the lower surface with different wettability can be completed simultaneously, and the generation of watermarks can be effectively prevented.
- FIG. 32 is a plan view showing a schematic embodiment of a substrate processing unit 3-6 according to another embodiment of the present invention.
- a substrate W such as a semiconductor wafer to be processed is rotatably held in a chamber 110 by a substrate holder 111 (llla, 1 lib, 111 c, 111 d).
- the substrate holder 111 (1 11 a, 111 b, 111 c, 111 d) has a holding part suction nozzle (holding part suction part) 124 (124 a, 124, 124 c, 124 d) and a holding part cleaning nozzle, respectively.
- (Holding part cleaning part) 126 (126 a, 126 b, 126 c, 126 d) are installed in close proximity. Holding section suction nozzles 124a, 124b, 124c, 124d, and holding section cleaning nozzles 126a, 126b, 126c, 126d are supported by support sections 128a, 128b, 128c, 128d, respectively. ing. Each holding section suction nozzle 124 can be adjusted with the adjusting section 124 ′, and each holding section cleaning nozzle 126 with the adjusting section 126 can be adjusted with the substrate holding section 111.
- a cleaning nozzle (substrate processing unit) 112, 115 having a fluid supply port and a fluid suction port is provided on the upper surface side and the lower surface side of the substrate W.
- the cleaning nozzles 112, 115 are illustrated in FIG. As indicated by the middle two-dot chain line (the two-dot chain line indicating the cleaning nozzle 1 1 5 is not shown), it is movable in the radial direction of the substrate W.
- gas supply nozzles 1 1 3, 1 1 4 for supplying an inert gas such as N 2 gas or a drying gas such as dry air with a humidity of 10% or less on the upper surface side and the lower surface side of the substrate W Force S is arranged.
- the gas supply nozzles 1 1 3 and 1 1 4 have gas supply ports 1 1 7 and 1 1 8, respectively.
- These gas supply nozzles 1 1 3 and 1 14 can swing around the fulcrum C along the substantially radial direction of the substrate W as indicated by a dashed line in the figure.
- the substrate processing unit 3-6 includes a bevel suction nozzle (peripheral portion suction portion) 1 1 6 that sucks fluid from the peripheral portion of the substrate W.
- the number of substrate holders 1 1 1 is four in the figure, but is not particularly limited as long as it is three or more.
- the fluid from the cleaning nozzle here include cleaning fluid, etching solution, etching gas, etc.
- corrosive gas such as hydrogen fluoride, acid such as hydrofluoric acid, hydrogen peroxide, nitric acid, etc.
- Oxidants such as ozone, alkali agents such as ammonia, chelating agents, surfactants, and some of them.
- FIG. 33 shows a state in which the substrate processing unit shown in FIG. As shown in Fig. 33, the cleaning nozzle on the upper surface side (substrate processing unit) 1 1 2 is placed close to the surface side of the substrate W at a predetermined height by lifting means (not shown), and the lower surface side is cleaned. Nozori (Substrate Processing Unit). 1 1 5 is also placed close to the back side of the substrate W. The lower surface side cleaning nozzle 115 is disposed close to a predetermined height by lifting means (not shown). In this apparatus as well, the substrate W is held horizontally while being given a rotational force by the substrate holding portion 11 1 1 constituted by the rollers 1 20.
- the gas supply nozzles 1 1 3 on the upper surface side and the gas supply nozzles 1 1 4 on the lower surface side are in the retracted positions.
- the upper surface cleaning nozzle 1 1 2 is retracted to the retracted position in the radial direction of the substrate W.
- the upper surface gas supply nozzle 1 1 3 is moved to supply dry gas onto the substrate W.
- a drying process is performed.
- the lower cleaning nozzle 1 15 is also retracted to the retracted position in the radial direction and below the substrate W, and instead the lower surface gas supply nozzle 1 14 is moved to a predetermined position. Gas is supplied to the side and the drying process is performed.
- These cleaning nozzles 1 1 2 and 1 1 5 are alternately arranged approximately 10 each when a substrate with a diameter of 200 mm is processed by separating the fluid supply port and the fluid suction port from the cleaning nozzle.
- a fluid (liquid) such as a cleaning liquid is supplied to the substrate W from the fluid supply port, and a fluid (liquid) attached to the substrate W is sucked from the fluid suction port.
- the fluid supply port and the fluid suction port reciprocate to supply and suck each fluid (liquid). This process has the advantage that the remaining fluid (liquid) on the substrate after processing is extremely reduced by preventing the fluid (liquid) from scattering from the substrate surface. I will.
- FIG. 34A to FIG. 34C show specific embodiments of the cleaning unit.
- the cleaning nozzles 1 1 2 and 1 1 5 each have working surfaces K 1 and K 2 on the nozzle body, and fluid (liquid) supply ports 2 2 7 and suction ports 2 2 8 are provided on the respective working surfaces. They are arranged alternately and in a straight line.
- each supply port 2 2 7 is connected to a common supply tube 2 2 9 and each suction port 2 2 8 is similarly connected to a common drainage exhaust tube 2 3 Connected to 0.
- the drainage exhaust pipe 2 30 communicates with a vacuum source and is sucked by vacuum, so the fluid (liquid) adhering to the substrate surface is sucked from each suction port 2 28.
- each of the cleaning units 1 1 2 and 1 15 is provided with two drainage exhaust pipes 2 3 0 and 2 3 0 and two supply pipes 2 2 9 and 2 2 9.
- a pair of supply pipes 2 29 and a drainage exhaust pipe 2 30 are connected to a supply port 2 2 7 and a suction port 2 2 8 that open to the working surface K 1.
- the other pair of supply pipes 2 29 and the drainage exhaust pipe 2 30 are connected to the supply port 2 2 7 and the suction port 2 28 that open to the other working surface K 2, respectively.
- supply port 2 2 7 and suction port 2 2 8 is supply port 2 2 7, supply port 2 2 7, suction port 2 2 8, supply port 2 2 7, supply port 2 2 7, suction port 2 2 8...
- the number of the supply ports 2 27 and the suction ports 2 28 in the supply unit and the suction unit may be one or more, and the supply unit and the suction unit may be alternately arranged.
- the working surface K 1, K 2 can be switched. As a result, it is possible to process with different fluids (liquids) in the same cleaning nozzle 1 1 2 and 1 15.
- the chemical treatment or etching process is performed.
- the process on the working surface K 1 is followed by rinsing with pure water, and the process on the working surface K 1.
- the fluid (liquid) remaining on the substrate may be replaced with a rinsing liquid.
- the processing liquid is supplied from the cleaning nozzles 1 1 2 and 1 15 by the working surface K 1, and the upper surface and the lower surface of the substrate W are processed.
- each supply port and each suction port are preferably arranged at a certain distance from the substrate surface.
- the flow from all supply ports to the substrate surface is the same.
- Body (fluid) can be supplied and processed uniformly.
- suction can be performed from the same distance to the substrate surface at all suction ports, and the suction force to the substrate can be kept constant at all suction ports without deviation.
- the distance from the substrate surface at the front end of the supply port 2 27 is preferably 2 mm or less, more preferably close to 0.5 mm or less and the same distance.
- the distance from the substrate surface at the tip of the suction port 2 28 is preferably 2 mm or less, more preferably close to 0.5 mm or less so as to be equidistant.
- the distance between the supply port 2 2 7 and the suction port 2 2 8 may not be equal.
- the flow rate of the fluid (liquid) supplied from each supply port is preferably 1 to 3 O m LZmin for each supply port.
- l to 10 m L / min in order to react with the substrate surface by supplying a chemical solution, l to 10 m L / min, more preferably about 1 to 5 mL / min.
- the flow rate of the fluid (liquid) used to clean one side is about 3 O m L / min.
- the flow rate to be supplied is very small, there is very little scattering of fluid during processing.
- the remaining amount of liquid on the substrate after processing is extremely small.
- the supply port 2 2 7 and the suction port 2 2 8 are separated from each other so that the fluid (liquid) supplied onto the substrate from the supply port is not directly sucked from the suction port, and the step d and the interval s ( (See Fig. 36 A).
- the step d and the interval s are preferably at least 1 mm.
- the cleaning nozzles 1 1 2 and 1 15 can reciprocate as indicated by arrows in FIG. 35 along the radial direction of the substrate to be cleaned.
- the arrangement direction of the cleaning nozzle and the reciprocating motion of the nozzle do not necessarily have to be in the same straight line. Therefore, as shown in Fig. 36 A, this cleaning nozzle supplies (stands) the fluid (liquid) to the substrate W from the fluid (liquid) supply port 2 2 7 force close to the substrate W, and at a certain time.
- the surplus fluid (liquid) remaining on the substrate W later is removed by suction from the suction port 2 28 located away from the supply port 2 27.
- the fluid (liquid) supplied to the substrate W is removed by centrifugal force generated by high-speed rotation.
- the fluid (liquid) is supplied to the substrate W in a stationary state where the fluid (liquid) does not move relative to the substrate, and the supplied fluid (liquid) remains on the substrate for a certain time or more.
- the separated suction port moves by the above-described radial reciprocation of the cleaning nozzle, and the fluid (liquid) after reacting with the substrate surface is sucked from the suction port. I have to.
- the fluid (liquid) is transferred to the entire surface of the substrate by reciprocating the substrate in the radial direction of the substrate and rotating the substrate It is desirable to supply or print on the body in a thin film having a predetermined substantially uniform thickness, and it is preferable to lower the flow rate of the fluid (liquid).
- the flow rate of fluid (liquid) is preferably 5 m / s or less, more preferably 1 mZ s or less.
- the rotational speed of the substrate W, 5 0 O min- 1 or less, in particular 1 0 O min- 1 or less favored arbitrariness.
- the amount of fluid (liquid) used can be greatly reduced compared to the general method of supplying to the center of the substrate and performing spin cleaning.
- the fluid (liquid) can be prevented from being scattered by supplying the fluid (liquid) onto the substrate and sucking the fluid (liquid).
- the amount of fluid (liquid) remaining on the substrate W by suction and the thickness thereof are always kept constant over the entire substrate surface, so that the stability and uniformity of processing are improved.
- the fluid (liquid) is supplied (placed) at a position where the fluid (liquid) is to be supplied. Therefore, the fluid (liquid) is not spread over the entire substrate by the high-speed rotation of the substrate W. Treatment at a low speed of about 1 is preferred.
- a semiconductor substrate of 200 mm has a rotation speed of 5 min min- 1 and at least 0. It is necessary to supply fluid (liquid) with a flow rate of 5 L / min to one side of the board.
- the cleaning unit repeats the supply and suction of the fluid (liquid), so that the substrate can be sufficiently cleaned with the flow rate of the fluid (liquid) before and after 30 m LZmin.
- the period of reciprocation along the radial direction of the substrate between the supply port and the suction port needs to be larger than the rotation period of the substrate. If the rotation cycle of the substrate W and the cycle of the reciprocating motion of the cleaning unit are the same, the fluid (liquid) is always supplied and sucked at a fixed position on the substrate, so the processing becomes non-uniform. In contrast, if the cycle of the reciprocating motion of the cleaning unit is increased with respect to the rotation cycle of the substrate, for example, the substrate rotates several times for one reciprocating cleaning unit, and the fluid (liquid) on the substrate Supply and suction are performed in a spiral (see Fig. 36B, Fig. 36D).
- the stop time at the moving end is preferably within 0.5 seconds.
- the time for stopping when reversing is to supply the liquid to the same position so it is preferable that the time is as short as possible. For example, if the reciprocation is 5 seconds, the stop time at the moving end is within 0.5 seconds, more preferably 0. Within 1 second.
- the moving range of the supply port 2 27 of the cleaning nozzle 1 15 is preferably within the radial range of the substrate not including the center W o and the end of the substrate. If the fluid (liquid) supply port is moved to the center Wo of the substrate, the amount of fluid (liquid) supplied to the center Wo becomes larger than the other, which is not preferable. For this reason, it is preferable that the movement range of the supply port 2 2 7 does not include the center point Wo of the substrate but is positioned close to the center point Wo. In addition, if fluid (liquid) is supplied to the edge of the substrate, the fluid (liquid) may be scattered outside the substrate, so it is necessary to limit the movement range of the supply port.
- the fluid (liquid) supply port and the suction port are arranged in a straight line at regular intervals.
- the above-described cleaning function can be achieved without arranging them in a straight line.
- the cleaning unit is provided with two working surfaces, and the fluid (liquid) supply port and the suction port are respectively disposed.
- the fluid (liquid) supply port and the suction port are disposed on one surface. Only another fluid (liquid) supply port may be arranged on the other surface.
- the fluid supply (liquid) supply and suction ports may be arranged not only on the two surfaces but also on the three surfaces and further on four or more surfaces.
- the cleaning sections 1 1 2 and 1 15 may be polygonal, circular or have a structure having two or more working nozzle groups. Also, as shown in Fig. 34B and Fig. 34C, the cross section can be a combination of a polygon and a circle.
- Fig. 3 4 A there are multiple fluid (liquid) supply ports 2 2 7 and each controls the flow rate of the fluid (liquid) supplied from each supply port. It is preferable to adjust the nozzle opening diameter so that the supply flow rate of the cleaning fluid (liquid) increases. Since this cleaning unit supplies fluid (liquid) close to the rotating substrate, the surface area to be supplied per unit time increases as it goes to the outer peripheral side of the substrate. For this reason, it is necessary to increase the flow rate of the fluid (liquid) supplied from each supply port corresponding to the target area as it goes to the outer peripheral side, and the fluid (liquid) is uniformly distributed over the entire surface of the substrate. Supply can be made.
- the supply flow rate and flow velocity of the fluid (liquid) at each supply port can be calculated from the opening diameter or size of the supply port.
- the supply pressure so as to achieve a predetermined supply flow rate and flow velocity, the flow rate accuracy of a fluid (liquid) such as a cleaning liquid can be increased, and precise cleaning becomes possible.
- heat and / or cool the fluid (liquid) It is preferable to provide temperature control means.
- the substrate processing performance of the fluid (liquid) may depend on the temperature, and in such a case, it is preferable that the fluid (liquid) can be adjusted to a suitable temperature.
- the temperature control means can be realized by providing a heater or a cooling unit in the fluid (liquid) supply piping.
- each of the suction ports 2 2 8 is also configured so that the conductance can be adjusted (suction port shape and size), and each suction port 2 2 8 is the same or adjusted to a predetermined suction pressure or for each suction port 2 2 8
- the processing fluid (liquid) is sucked by a separate vacuum source, but the suction flow rate and flow rate of the processing fluid (liquid) from each suction port 2 28 can also be changed individually by setting the suction port opening diameter arbitrarily. it can. Once the opening diameter of the suction port 2 2 8 is set, the suction flow rate and flow rate can be changed by changing the suction strength of the vacuum source.
- the processing liquid is always deposited to a uniform thickness over the entire surface of the substrate, and the processing liquid is supplied at a uniform speed everywhere on the surface of the substrate. ) It is preferable for uniformly treating the entire surface of the substrate.
- the cleaning unit 1 1 2, 1 1 5 Reciprocating cycle average speed, maximum speed, supply fluid (liquid) supply pressure, temperature, vacuum source vacuum strength and fluid (liquid) type, etc.
- the measured values corresponding to each processing condition are monitored during processing of the substrate to be processed, and the predetermined setting data of each processing condition is compared with the actual measured values so that the actual measurement values maintain the predetermined setting data.
- Means for controlling the processing steps of the substrate may be provided.
- a bevel cleaning means may be provided in the substrate processing unit in which the cleaning unit 115 for processing the lower surface of the substrate is arranged.
- the back surface of the substrate can be cleaned or etched simultaneously with the processing of the substrate bevel.
- the cleaning unit 1 1 2 may be disposed on the upper surface of the substrate, and bevel cleaning means for processing the peripheral portion of the lower surface may be provided.
- the suction port it is preferable to further include means for collecting and reusing the fluid (liquid) sucked from the suction port.
- the used fluid (liquid) is recovered in a recovery tank, filtered through a filter, and then returned to the fluid (liquid) supply tank of the substrate processing unit.
- the fluid (liquid) can be reused, further saving resources. It is preferable to provide means for monitoring the concentration of the recovered fluid (liquid) or the concentration of impurities contained.
- 37 and 38 show a schematic configuration of a substrate processing unit 3_7 according to another embodiment of the present invention, and FIG. 39 shows a system configuration thereof.
- the substrate W to be processed is held while being rotated by the substrate holding portions 111a, 111b, 111c, 111d made of rollers, and the holding portion suction nozzle 124 (1 24 a, 124 b, 124 c, 124 d) Aspirate the processing liquid from the holder cleaning nozzle 126 (126 a, 126 b, 126 c, 126 d) while supplying the cleaning liquid to the clamp part 121.
- the cleaning unit 115 is provided only on the lower surface side of the substrate W, and the purge plate 238 movable in the horizontal and vertical directions is provided on the upper surface side of the substrate W.
- the purge plate 238 is provided with an opening (not shown) through which an inert gas such as N 2 gas is supplied to the substrate W such as a semiconductor wafer. Thereby, it is possible to prevent the substrate surface from being contaminated or denatured by the mist of the fluid (liquid) generated from the lower surface side of the substrate W. Only one opening may be provided at a position corresponding to the center of the substrate W of the purge plate 238, or a plurality of openings may be provided in a radial direction along a plurality of circles arranged concentrically with the substrate W. You can place them at regular intervals! /.
- the substrate processing unit 3-7 includes a bevel cleaning nozzle 236 for cleaning the peripheral portion (bevel portion) of the substrate and a bevel arch I nozzle 237 for cleaning liquid. Accordingly, the cleaning liquid supplied from the bevel cleaning nozzle 236 is sucked and removed from the bevel suction nozzle 237 immediately before the substrate W makes a round in the direction of the arrow. Therefore, according to this apparatus, the back surface side of the substrate can be cleaned, and the bevel portion on the front side of the substrate can be cleaned. It is also possible to perform a process such as an etching process using the nozzle described above, followed by a cleaning process.
- the bevel cleaning nozzle 236 and the bevel suction nozzle 237 can be moved by the motor M in the radial direction of the substrate W so that the processing position of the peripheral edge of the substrate can be adjusted. Further, the entire surface of the substrate may be processed by reciprocating the bevel cleaning nozzle 236 and the bevel suction nozzle 237 from the center to the periphery of the substrate.
- the purge plate 238 has a substantially circular shape that does not cover the peripheral edge of the substrate W and the peripheral edge of the substrate W that does not interfere with the bevel cleaning nozzle 236 and the bevel suction nozzle 237.
- the chemical solution is supplied from the chemical solution feeding tank 231 to the cleaning unit 115, and the chemical solution is supplied from the supply port of the cleaning unit 115 onto the surface of the substrate W. .
- the cleaning unit 115 reciprocates in the horizontal direction in the figure by the motor M, and collects the chemical solution supplied on the substrate from the suction port. Collected from the suction port The chemical is once sent to the recovery tank (gas-liquid separation tank) 2 3 2 where it is separated into gas and liquid and then sent to the circulation tank 2 3 3.
- the used chemical solution stored in the circulation tank 2 3 3 is pressurized by the pump P, filtered by the filter 2 3 4, and the temperature is adjusted by the temperature controller 2 3 5, and then the chemical solution can be reused. It is returned to the pressure tank 2 3 1. In this way, the chemical solution can be recycled and reused, thereby saving resources of the chemical solution.
- the chemical solution supplied from the bevel cleaning nozzle 2 3 6 to the bevel portion of the substrate is also sucked by the bevel suction nozzle 2 37 and can be reused in the same manner.
- the used chemical solution can be recycled and reused by providing means for regenerating the used chemical solution returned to the circulation tank 2 3 3.
- the substrate processing units 3_5 to 3-7 it is preferable to apply the following configuration, which is a feature of the substrate processing unit 3_4, to the extent applicable.
- An air curtain is formed so as to wrap the substrate evenly by air intakes provided symmetrically with respect to the substrate.
- the substrate cleaning apparatus and the substrate processing unit of the present invention are used to perform a cleaning process on a substrate (semiconductor wafer or the like) used for manufacturing a semiconductor device.
Abstract
Description
Claims
Priority Applications (1)
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US11/663,071 US20070277930A1 (en) | 2004-09-17 | 2005-09-14 | Substrate Cleaning Apparatus and Substrate Processing Unit |
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JP2004-271875 | 2004-09-17 | ||
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JP2005247070A JP2006114884A (ja) | 2004-09-17 | 2005-08-29 | 基板洗浄処理装置及び基板処理ユニット |
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US (1) | US20070277930A1 (ja) |
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CN113496927A (zh) * | 2021-05-30 | 2021-10-12 | 黄国燊 | 一种半导体硅片表面液体清理设备 |
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Also Published As
Publication number | Publication date |
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JP2006114884A (ja) | 2006-04-27 |
TWI373799B (en) | 2012-10-01 |
TW200616068A (en) | 2006-05-16 |
US20070277930A1 (en) | 2007-12-06 |
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