WO2023021999A1 - 基板処理方法および基板処理装置 - Google Patents
基板処理方法および基板処理装置 Download PDFInfo
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- WO2023021999A1 WO2023021999A1 PCT/JP2022/029881 JP2022029881W WO2023021999A1 WO 2023021999 A1 WO2023021999 A1 WO 2023021999A1 JP 2022029881 W JP2022029881 W JP 2022029881W WO 2023021999 A1 WO2023021999 A1 WO 2023021999A1
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- WIPO (PCT)
- Prior art keywords
- substrate
- etching amount
- wafer
- gas
- temperature control
- Prior art date
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- 239000000758 substrate Substances 0.000 title claims abstract description 154
- 238000000034 method Methods 0.000 title abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 130
- 238000005530 etching Methods 0.000 claims abstract description 111
- 230000002093 peripheral effect Effects 0.000 claims abstract description 21
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 16
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 238000012545 processing Methods 0.000 claims description 169
- 239000007789 gas Substances 0.000 claims description 164
- 238000003672 processing method Methods 0.000 claims description 32
- 238000007664 blowing Methods 0.000 claims description 15
- 239000000112 cooling gas Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000011259 mixed solution Substances 0.000 claims description 3
- 235000012431 wafers Nutrition 0.000 description 182
- 238000012546 transfer Methods 0.000 description 18
- 230000007246 mechanism Effects 0.000 description 13
- 238000010586 diagram Methods 0.000 description 8
- 238000012986 modification Methods 0.000 description 7
- 230000004048 modification Effects 0.000 description 7
- 239000012530 fluid Substances 0.000 description 5
- 238000011084 recovery Methods 0.000 description 3
- 210000000078 claw Anatomy 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 238000007781 pre-processing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- XEMZLVDIUVCKGL-UHFFFAOYSA-N hydrogen peroxide;sulfuric acid Chemical compound OO.OS(O)(=O)=O XEMZLVDIUVCKGL-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67017—Apparatus for fluid treatment
- H01L21/67063—Apparatus for fluid treatment for etching
- H01L21/67075—Apparatus for fluid treatment for etching for wet etching
- H01L21/6708—Apparatus for fluid treatment for etching for wet etching using mainly spraying means, e.g. nozzles
-
- 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
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/304—Mechanical treatment, e.g. grinding, polishing, cutting
-
- 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
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
-
- 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
- H01L21/67098—Apparatus for thermal treatment
- H01L21/67109—Apparatus for thermal treatment mainly by convection
-
- 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
- H01L21/67242—Apparatus for monitoring, sorting or marking
- H01L21/67253—Process monitoring, e.g. flow or thickness monitoring
Definitions
- the present disclosure relates to a substrate processing method and a substrate processing apparatus.
- Patent Document 1 discloses that an SPM processing liquid, which is a mixture of sulfuric acid and hydrogen peroxide, is supplied to the substrate while moving from the periphery of the substrate toward the center of the substrate to process the substrate. It is
- the present disclosure provides a technique for improving the in-plane uniformity of a substrate in substrate processing.
- a substrate processing method supplies an SPM processing liquid, which is a mixed solution of sulfuric acid and hydrogen peroxide, to the central portion of the substrate while the substrate is held and rotated. a step of obtaining a reference etching amount corresponding to a position in the radial direction of the substrate when the etching amount reaches the target etching amount; and adjusting the moving speed of the supply nozzle for supplying the SPM processing liquid so as to eliminate the difference between the target etching amount and the reference etching amount when the substrate is processed with the SPM processing liquid.
- SPM processing liquid which is a mixed solution of sulfuric acid and hydrogen peroxide
- FIG. 1 is a diagram showing the configuration of a substrate processing system according to an embodiment.
- FIG. 2 is a diagram illustrating the configuration of a processing unit according to the embodiment;
- FIG. 3 is a perspective view of an adjustment plate according to the embodiment;
- FIG. 4 is a flowchart illustrating substrate processing performed by the processing unit according to the embodiment.
- FIG. 5 is a diagram showing the target etching amount and the reference etching amount with respect to the radial position of the wafer.
- FIG. 6 is a diagram showing the reference etching amount and the target etching amount when there is a portion where the reference etching amount is locally reduced in the radial direction of the wafer.
- FIG. 1 is a diagram showing the configuration of a substrate processing system 1 according to an embodiment.
- the substrate processing system 1 includes a loading/unloading station 2 and a processing station 3 .
- the loading/unloading station 2 and the processing station 3 are provided adjacently.
- the loading/unloading station 2 includes a carrier placement section 11 and a transport section 12 .
- a plurality of carriers C for accommodating a plurality of substrates (hereinafter referred to as “wafers W”) in a horizontal state are mounted on the carrier mounting portion 11 .
- the transport section 12 is provided adjacent to the carrier mounting section 11 and includes a substrate transport device 13 and a transfer section 14 therein.
- the substrate transfer device 13 includes a substrate holding mechanism that holds the wafer W. As shown in FIG. Further, the substrate transfer device 13 can move in the horizontal direction and the vertical direction and can rotate around the vertical axis. conduct.
- the processing station 3 is provided adjacent to the transport section 12 .
- the processing station 3 includes a transport section 15 and a plurality of processing units 16 (an example of a substrate processing apparatus).
- a plurality of processing units 16 are arranged side by side on both sides of the transport section 15 .
- the transport unit 15 includes a substrate transport device 17 inside.
- the substrate transfer device 17 includes a substrate holding mechanism that holds the wafer W. As shown in FIG.
- the substrate transfer device 17 can move in the horizontal direction and the vertical direction and can rotate around the vertical axis, and transfers the wafer W between the delivery section 14 and the processing unit 16 using the substrate holding mechanism. I do.
- the processing unit 16 performs predetermined substrate processing on the wafer W transferred by the substrate transfer device 17 .
- the substrate processing system 1 also includes a control device 4 .
- Control device 4 is, for example, a computer, and includes control unit 18 and storage unit 19 .
- the storage unit 19 stores programs for controlling various processes executed in the substrate processing system 1 .
- the control unit 18 controls the operation of the substrate processing system 1 by reading and executing programs stored in the storage unit 19 .
- the program may be recorded in a computer-readable storage medium and installed in the storage unit 19 of the control device 4 from the storage medium.
- Examples of computer-readable storage media include hard disks (HD), flexible disks (FD), compact disks (CD), magnet optical disks (MO), and memory cards.
- the substrate transfer device 13 of the loading/unloading station 2 takes out the wafer W from the carrier C placed on the carrier platform 11, and receives the taken out wafer W. It is placed on the transfer section 14 .
- the wafer W placed on the transfer section 14 is taken out from the transfer section 14 by the substrate transfer device 17 of the processing station 3 and carried into the processing unit 16 .
- the wafer W loaded into the processing unit 16 is processed by the processing unit 16, then unloaded from the processing unit 16 by the substrate transport device 17, and placed on the delivery section 14. Then, the processed wafer W placed on the transfer section 14 is returned to the carrier C on the carrier placement section 11 by the substrate transfer device 13 .
- FIG. 2 is a diagram showing the configuration of the processing unit 16 according to the embodiment.
- the processing unit 16 shown in FIG. 2 supplies an SPM (Sulfuric Acid Hydrogen Peroxide Mixture) processing liquid, which is a mixed liquid of sulfuric acid and hydrogen peroxide, to the surface (upper surface) of the wafer W, for example, the surface of the wafer W. Remove the film formed on the Further, the processing unit 16 adjusts the temperature of the wafer W by supplying N2 gas, which is a temperature control gas, to the rear surface (lower surface) of the wafer W. As shown in FIG. By supplying the N2 gas to the back surface of the wafer W, the back surface of the wafer W is prevented from becoming negative pressure.
- SPM sulfuric Acid Hydrogen Peroxide Mixture
- the processing unit 16 includes a chamber 20 , a substrate holding mechanism 21 , a processing fluid supply section 22 and a collection cup 23 .
- the chamber 20 accommodates part of the substrate holding mechanism 21 , part of the processing fluid supply section 22 and the recovery cup 23 .
- An FFU (Fan Filter Unit) 24 is provided on the ceiling of the chamber 20 . FFU 24 creates a downflow within chamber 20 .
- the substrate holding mechanism 21 holds and rotates the wafer W.
- the substrate holding mechanism 21 includes a holding portion 30 , a support portion 31 and a driving portion 32 .
- the holding part 30 (an example of a substrate holding part) holds a wafer W (an example of a substrate).
- the holding part 30 holds the wafer W horizontally.
- the holding part 30 includes a claw part 30a for holding the wafer W. As shown in FIG.
- the holding portion 30 includes a motor (not shown) that opens and closes the claw portion 30a.
- the strut part 31 is a member extending in the vertical direction, the base end part of which is rotatably supported by the drive part 32, and the tip part of which supports the holding part 30 horizontally.
- the drive section 32 rotates the support section 31 around the vertical axis.
- the drive section 32 moves the support section 31 in the vertical direction.
- the drive unit 32 includes, for example, a plurality of motors, gears that transmit rotation generated by the motors, link mechanisms, and the like.
- the substrate holding mechanism 21 rotates the holding section 30 supported by the support section 31 by rotating the support section 31 using the driving section 32 . That is, the driving section 32 (an example of the rotating section) rotates the holding section 30 (an example of the substrate holding section). Thereby, the wafer W held by the holding part 30 rotates.
- the processing fluid supply unit 22 supplies the wafer W with various liquids used for substrate processing.
- the processing fluid supply section 22 includes a processing liquid supply section 40, a rinse liquid supply section 50, a first arm drive section 60, a second arm drive section 61, a first N2 gas supply section 70, and a second N2 gas supply section. 80.
- the processing liquid supply unit 40 supplies the wafer W with the SPM processing liquid.
- the processing liquid supply unit 40 supplies the surface of the wafer W with the SPM processing liquid.
- the processing liquid supply unit 40 includes a processing liquid supply source 41 , a processing liquid supply nozzle 42 , and a processing liquid adjusting section 43 .
- the processing liquid supply nozzle 42 is connected to the processing liquid supply source 41 via the processing liquid adjusting section 43 .
- a processing liquid supply nozzle 42 (an example of a supply nozzle) supplies an SPM processing liquid, which is a mixture of sulfuric acid and hydrogen peroxide, to a wafer W (an example of a substrate).
- the processing liquid supply nozzle 42 is attached to the first support arm 45 .
- the processing liquid adjustment unit 43 adjusts the flow rate of the SPM supplied from the processing liquid supply nozzle 42 to the surface of the wafer W.
- the treatment liquid adjustment unit 43 includes an on-off valve (not shown), a flow rate adjustment valve (not shown), and a motor (not shown) that operates each valve.
- the rinse liquid supply unit 50 supplies the wafer W with the rinse liquid.
- the rinse liquid is DIW (DeIonized Water).
- the rinse liquid is normal temperature.
- the rinse liquid supply unit 50 supplies the rinse liquid to the surface of the wafer W.
- the rinse liquid supply unit 50 includes a rinse liquid supply source 51 , a rinse liquid supply nozzle 52 and a rinse liquid adjuster 53 .
- the rinse liquid supply nozzle 52 supplies the rinse liquid to the surface of the wafer W.
- the rinse liquid supply nozzle 52 is connected to the rinse liquid supply source 51 via the rinse liquid adjusting section 53 .
- the rinse liquid supply nozzle 52 is attached to the first support arm 45 .
- the rinse liquid adjustment unit 53 adjusts the flow rate of the rinse liquid supplied to the surface of the wafer W from the rinse liquid supply nozzle 52 .
- the rinse liquid adjustment unit 53 includes an on-off valve (not shown), a flow rate adjustment valve (not shown), a motor (not shown) that operates each valve, and the like.
- the rinse liquid adjusting section 53 can adjust the flow rate of the rinse liquid in the rinse liquid supply nozzle 52 .
- the first arm driving section 60 moves the first support arm 45 in the vertical direction.
- the first arm drive section 60 rotates the first support arm 45 around the vertical axis. That is, the first arm driving section 60 (an example of a moving section) moves the treatment liquid supply nozzle 42 (an example of a supply nozzle).
- the first arm driving section 60 includes, for example, a plurality of motors, gears that transmit rotation generated by the motors, link mechanisms, and the like.
- the first arm drive unit 60 moves the processing liquid supply nozzle 42 and the rinse liquid supply nozzle 52 in the radial direction of the wafer W by rotating the first support arm 45 .
- the first arm drive section 60 rotates the first support arm 45 to move the treatment liquid supply nozzle 42 and the rinse liquid supply nozzle 52 between the standby position and the central position.
- the standby position is a state in which the processing liquid supply nozzle 42 and the rinse liquid supply nozzle 52 are not above the wafer W, and the SPM processing liquid or the like is not supplied to the wafer W.
- the central position is a state in which the processing liquid supply nozzle 42 and the rinse liquid supply nozzle 52 are above the central portion of the wafer W, and is a position where the SPM processing liquid or the like is supplied toward the central portion of the wafer W. .
- the first arm driving section 60 moves the processing liquid supply nozzle 42 and the rinsing liquid supply nozzle 52 to the edge of the wafer W. , toward the center of the wafer W. Further, the first arm driving section 60 rotates the first support arm 45 when moving the treatment liquid supply nozzle 42 and the rinse liquid supply nozzle 52 from the central position to the standby position. As a result, the processing liquid supply nozzle 42 and the rinse liquid supply nozzle 52 move from the central portion of the wafer W toward the peripheral portion thereof.
- the first N2 gas supply unit 70 supplies N2 gas (an example of a temperature control gas) from the back side of the wafer W (an example of a substrate).
- the first N2 gas supply unit 70 includes an adjustment plate 71 , a plate holder 72 , a first N2 gas supply source 73 , a first N2 gas supply nozzle 74 and a first N2 gas adjustment unit 75 .
- the adjustment plate 71 is provided on the back side of the wafer W (an example of a substrate) and adjusts the blowing position of the N2 gas (an example of a temperature control gas) toward the wafer W.
- the adjustment plate 71 is provided below the wafer W held by the holding portion 30 of the substrate holding mechanism 21 .
- the adjustment plate 71 as shown in FIG. 3, includes a first plate 71a and a second plate 71b.
- FIG. 3 is a perspective view of the adjustment plate 71 according to the embodiment. In the adjustment plate 71, the first plate 71a is arranged above the second plate 71b.
- the first plate 71a is formed in a circular shape.
- a plurality of blowout holes 71c are formed in the first plate 71a.
- a plurality of blowout holes 71c are formed, for example, along the radial direction and the circumferential direction of the first plate 71a.
- the blowout hole 71c is a hole through which the N2 gas is blown out toward the back surface of the wafer W. As shown in FIG.
- the second plate 71b is formed in a circular shape.
- the second plate 71b is provided so as to be rotatable in the circumferential direction with respect to the first plate 71a.
- An adjustment hole 71d is formed in the second plate 71b.
- the adjustment hole 71d is a hole for adjusting the position of the N2 gas blown toward the back surface of the wafer W.
- As shown in FIG. 71 d of adjustment holes are formed in fan shape, for example. Note that the shape of the adjustment hole 71d is not limited to this.
- 71 d of adjustment holes may be formed in circular arc shape, for example. Also, a plurality of adjustment holes 71d may be formed.
- the adjustment plate 71 changes the position of the N2 gas blown toward the back surface of the wafer W by changing the relative positions of the first plate 71a and the second plate 71b in the circumferential direction.
- the adjustment plate 71 may include a plurality of second plates 71b. By changing the relative positions of the plurality of second plates 71b in the circumferential direction, it is possible to finely adjust the position of the N2 gas blown out from the blowout holes 71c of the first plate 71a.
- the adjustment plate 71 may be a single plate.
- the adjustment plate 71 may be a single plate having an arcuate adjustment hole 71d.
- the adjustment plate 71 may be able to change the combination of the plurality of first plates 71a and the plurality of second plates 71b.
- the plate holding portion 72 holds the adjustment plate 71 .
- the plate holding part 72 holds the first plate 71a and the second plate 71b so that the relative positions of the first plate 71a and the second plate 71b in the circumferential direction can be adjusted.
- the plate holding portion 72 is supported by the support portion 31 .
- the plate holding portion 72 rotates together with the support portion 31 when the support portion 31 is rotated by the driving portion 32 .
- the plate holding portion 72 may be provided so as not to rotate when the support portion 31 is rotated by the driving portion 32 .
- the plate holding portion 72 may be supported by the column portion 31 via bearings or the like. The plate holding portion 72 moves vertically as the supporting column portion 31 moves vertically.
- the adjusting plate 71 and the plate holding portion 72 are provided so that the wafer W can be carried in and out.
- the adjustment plate 71 and the plate holding portion 72 are formed with through holes through which lift pins for transferring the wafer W pass.
- the first N2 gas supply nozzle 74 is connected to the first N2 gas supply source 73 via the first N2 gas regulator 75 .
- the first N2 gas supply nozzle 74 supplies the back surface of the wafer W with N2 gas.
- a first N2 gas supply nozzle 74 is provided in the central portion of the plate holding portion 72 .
- the first N2 gas adjustment unit 75 adjusts the flow rate of the N2 gas supplied to the back surface of the wafer W from the first N2 gas supply nozzle 74.
- the first N2 gas adjustment unit 75 includes an on-off valve (not shown), a flow rate adjustment valve (not shown), a motor (not shown) for operating each valve, and the like.
- the first N2 gas adjustment unit 75 adjusts the temperature of the N2 gas.
- the first N2 gas adjustment unit 75 includes a heater, a gas cooler, and the like.
- the second N2 gas supply unit 80 supplies N2 gas from the surface side of the wafer W.
- the second N2 gas supply section 80 includes a second N2 gas supply source 81 , a second N2 gas supply nozzle 82 and a second N2 gas adjustment section 83 .
- the second N2 gas supply nozzle 82 is connected to the second N2 gas supply source 81 via the second N2 gas regulator 83 .
- the second N2 gas supply nozzle 82 may be connected to the first N2 gas supply source 73 via the second N2 gas adjustment section 83 . That is, N2 gas may be supplied to the first N2 gas supply nozzle 74 and the second N2 gas supply nozzle 82 from a common N2 gas supply source.
- a second N2 gas supply nozzle 82 is attached to a second support arm 85 .
- the second N2 gas supply nozzle 82 may radially discharge the N2 gas.
- the second N2 gas adjustment unit 83 adjusts the flow rate of the N2 gas supplied from the second N2 gas supply nozzle 82 to the surface of the wafer W.
- the second N2 gas adjustment unit 83 includes an on-off valve (not shown), a flow rate adjustment valve (not shown), a motor (not shown) for operating each valve, and the like.
- the second N2 gas adjustment unit 83 adjusts the temperature of the N2 gas.
- the second N2 gas adjustment unit 83 includes a heater, a gas cooler, and the like. A heater for adjusting the temperature of the N 2 gas may be provided on the second support arm 85 .
- the second arm driving section 61 moves the second support arm 85 in the vertical direction.
- the second arm drive section 61 rotates the second support arm 85 around the vertical axis.
- the second arm driving section 61 includes, for example, a plurality of motors, gears that transmit rotation generated by the motors, link mechanisms, and the like.
- the second arm driving section 61 moves the second N2 gas supply nozzle 82 in the radial direction of the wafer W by rotating the second support arm 85 .
- the second arm driving section 61 moves the second N2 gas supply nozzle 82 above the peripheral edge of the wafer W, for example.
- the blowing position of the N2 gas supplied to the wafer W is adjusted.
- the collection cup 23 is arranged so as to surround the holding section 30 and collects the SPM processing liquid and the like scattered from the wafer W due to the rotation of the holding section 30 .
- a drain port 23a is formed at the bottom of the recovery cup 23, and the SPM processing liquid and the like collected by the recovery cup 23 are discharged to the outside of the processing unit 16 through the drain port 23a.
- An exhaust port 23 b is formed at the bottom of the collection cup 23 to discharge the gas supplied from the FFU 24 to the outside of the processing unit 16 .
- control device 4 causes the wafer W to be processed.
- the control device 4 controls the rotation of the drive section 32 .
- the controller 4 controls the drive unit 32 to control the rotational speed of the wafer W.
- the control device 4 controls the first arm driving section 60 to adjust the supply position of the SPM processing liquid by the processing liquid supply nozzle 42 . Specifically, when the SPM processing liquid is supplied to the wafer W (an example of a substrate), the control device 4 directs the processing liquid supply nozzle 42 from the peripheral edge of the wafer W toward the center of the wafer W. (an example) moves the first arm drive unit 60 (an example of the moving unit).
- the controller 4 moves the processing liquid supply nozzle 42 (an example of the supply nozzle) that supplies the SPM processing liquid so as to eliminate the difference between the target etching amount and the reference etching amount corresponding to the radial position of the wafer W. Adjust speed.
- the reference etching amount is obtained by supplying the SPM processing liquid to the central portion of the wafer W while the wafer W (an example of the substrate) is held and rotated, and the etching amount of the central portion of the wafer W becomes the target etching amount.
- This is an etching amount corresponding to the position in the radial direction of the wafer W when A plurality of reference etching amounts are set according to the position of the wafer W in the radial direction.
- Preprocessing is processing for obtaining a reference etching amount.
- the wafer W (an example of a substrate) is held and rotated, and the SPM processing liquid is supplied to the central portion of the wafer W, and the etching amount of the central portion of the wafer W reaches the target etching amount.
- a reference etching amount corresponding to the radial position of the wafer W is obtained.
- the wafer W is held by the holder 30 of the processing unit 16 and rotated at a predetermined rotational speed.
- the predetermined rotation speed is a preset rotation speed, which is the same as the rotation speed in substrate processing, which will be described later.
- the SPM processing liquid is supplied to the central portion of the wafer W.
- the supply of the SPM processing liquid is stopped and the processing is stopped.
- the etching amount at the position in the radial direction of the wafer W is measured to obtain the reference etching amount.
- the reference etching amount is stored in the storage unit 19 .
- the reference etching amount may be obtained using the processing unit 16 or may be obtained by another processing unit 16 .
- the reference etching amount is obtained in association with the type of film formed on the wafer W.
- the processing time may be measured so that the etching amount in the central portion of the wafer W becomes the target etching amount, and the same processing may be performed for another wafer W again in the measured processing time. Then, when the etching amount at the central portion of another wafer W is the target etching amount, the etching amount at the radial position of the wafer W may be measured to obtain the reference etching amount.
- the SPM processing liquid When the SPM processing liquid is supplied from the central portion of the rotating wafer W, the SPM processing liquid spreads from the central portion of the wafer W toward the peripheral portion of the wafer W and flows.
- the temperature of the SPM processing liquid differs between the central portion of the wafer W and the peripheral portion of the wafer W.
- the peripheral edge portion of the wafer and the center portion of the wafer W may be etched differently. For example, when the temperature of the SPM processing liquid decreases toward the peripheral portion of the wafer W, the etching amount at the peripheral portion of the wafer W becomes smaller than the etching amount at the central portion of the wafer W. Therefore, in the embodiment, the substrate processing described below is performed.
- FIG. 4 is a flowchart illustrating substrate processing performed by the processing unit 16 according to the embodiment.
- the control device 4 executes the carry-in process (S100). Specifically, the control device 4 loads the wafer W into the chamber 20 by the substrate transfer device 17 and holds the wafer W by the holding section 30 .
- the holding unit 30 holds the wafer W so that the wafer W is oriented in a predetermined direction. That is, the holding unit 30 holds the wafers W in the same direction.
- the control device 4 executes SPM processing (S101).
- the control device 4 moves the supply position of the SPM processing liquid from the peripheral portion of the wafer W (an example of a substrate) toward the central portion of the wafer W, and when the wafer W is processed with the SPM processing liquid, the target etching
- the moving speed of the processing liquid supply nozzle 42 (an example of the supply nozzle) that supplies the SPM processing liquid is adjusted so as to eliminate the difference between the amount and the reference etching amount.
- control device 4 moves the processing liquid supply nozzle 42 from the peripheral portion of the wafer W toward the central portion of the wafer W while keeping the rotational speed of the wafer W at a predetermined rotational speed.
- the SPM processing liquid is supplied to W.
- the control device 4 sets the movement speed of the processing liquid supply nozzle 42 based on the target etching amount and the reference etching amount, and moves the processing liquid supply nozzle 42 from the peripheral portion of the wafer W toward the central portion of the wafer W. Let The control device 4 adjusts the moving speed of the processing liquid supply nozzle 42 so as to eliminate the difference between the target etching amount and the reference etching amount corresponding to the position of the wafer W in the radial direction. The controller 4 changes the moving speed of the processing liquid supply nozzle 42 according to the position of the wafer W in the radial direction.
- FIG. 5 is a diagram showing the target etching amount and the reference etching amount with respect to the radial position of the wafer W.
- the control device 4 reduces the moving speed of the processing liquid supply nozzle 42 on the peripheral edge side of the wafer W.
- FIG. 5 is a diagram showing the target etching amount and the reference etching amount with respect to the radial position of the wafer W.
- control device 4 supplies N2 gas (an example of a temperature control gas) to the wafer W (an example of a substrate).
- the controller 4 supplies N2 gas (an example of a temperature control gas) from the rear surface of the wafer W (an example of a substrate).
- the blowing position of the N2 gas (temperature control gas) is adjusted by the adjusting plate 71 .
- the control device 4 supplies N2 gas (temperature control gas) from the surface side of the wafer W (an example of a substrate).
- the blowing position of the N2 gas is adjusted by rotating the second support arm 85 and the second N2 gas supply nozzle 82 by the second arm drive section 61 .
- N2 gas is supplied to the surface of the peripheral portion of the wafer W. As shown in FIG.
- the controller 4 adjusts the temperature of the N2 gas.
- the etching amount on the wafer W is adjusted by the temperature of the N2 gas.
- N2 gas includes heating gas.
- the wafer W is heated by the supply of N2 gas, thereby promoting etching with the SPM processing liquid.
- the N2 gas includes a cooling gas. Since the wafer W is cooled by the supply of N2 gas, the etching by the SPM processing liquid is suppressed.
- the blowing position of the N2 gas is adjusted based on the target etching amount and the reference etching amount.
- the N2 gas blowing position is set to a position where it is difficult to eliminate the difference between the target etching amount and the reference etching amount corresponding to the radial position of the substrate by adjusting the moving speed of the processing liquid supply nozzle 42. is set to be blown out.
- FIG. 6 is a diagram showing the reference etching amount and the target etching amount when there is a portion where the reference etching amount is locally reduced in the radial direction of the wafer W. As shown in FIG. 6,
- the etching amount can be adjusted even in a portion where it is difficult to eliminate the difference between the target etching amount and the reference etching amount corresponding to the radial position of the substrate by adjusting the movement speed of the processing liquid supply nozzle 42. . Therefore, in the wafer W, variations in etching amount are suppressed.
- the temperature of the wafer W is adjusted with high accuracy. Therefore, variations in etching amount on the wafer W are suppressed.
- control device 4 may perform the SPM process without supplying the N2 gas from the second N2 gas supply nozzle 82.
- the control device 4 adjusts the flow rate of N2 gas (an example of a temperature control gas) based on the rotational speed of the wafer W (an example of a substrate).
- N2 gas an example of a temperature control gas
- the control device 4 sets the flow rate of the N2 gas according to the predetermined rotation speed, and supplies the set flow rate of the N2 gas to the rear surface of the wafer W from the first N2 gas supply nozzle 74 .
- the flow rate of the N2 gas increases as the rotation speed of the wafer W increases. That is, as the predetermined rotational speed increases, the flow rate of N2 gas increases.
- the controller 4 may adjust the flow rate of the N2 gas supplied from the second N2 gas supply nozzle 82 based on the rotational speed of the wafer W.
- the back surface of the wafer W is prevented from becoming negative pressure, and the occurrence of bending of the wafer W is suppressed.
- control device 4 executes the rinse process (step S102).
- the control device 4 stops the supply of the SPM processing liquid.
- the control device 4 supplies the rinse liquid to the central portion of the wafer W from the rinse liquid supply nozzle 52 while the wafer W is being rotated.
- the controller 4 makes the rotation speed of the wafer W higher than the rotation speed of the wafer W in the SPM process.
- the N2 gas flow rate increases as the wafer W rotates.
- the control device 4 executes the drying process (step S103).
- the control device 4 stops the supply of the rinse liquid.
- the controller 4 rotates the wafer W to shake off the rinsing liquid adhering to the wafer W, and dries the wafer W.
- FIG. For example, the control device 4 makes the rotation speed of the wafer W higher than the rotation speed of the wafer W in the rinsing process.
- the N2 gas flow rate increases as the wafer W rotates.
- the control device 4 executes carry-out processing (step S104). Specifically, the controller 4 stops the rotation of the wafer W and stops the supply of the N2 gas. Then, the control device 4 transfers the wafer W held by the holding part 30 to the substrate transfer device 17 and transfers the wafer W from the chamber 20 .
- a wafer W (an example of a substrate) is held and rotated, and an SPM processing liquid, which is a mixed solution of sulfuric acid and hydrogen peroxide, is supplied to the central portion of the wafer W.
- an SPM processing liquid which is a mixed solution of sulfuric acid and hydrogen peroxide, is supplied to the central portion of the wafer W.
- the moving speed of the supply nozzle that supplies the SPM processing liquid is adjusted so as to eliminate the difference between the target etching amount and the reference etching amount. and a step.
- the substrate processing method can suppress the occurrence of variations in etching amount in the radial direction of the wafer W.
- the substrate processing method can improve the in-plane uniformity of the wafer W.
- the substrate processing method includes a step of supplying N2 gas (an example of a temperature control gas) to a wafer W (an example of a substrate).
- the substrate processing method can adjust the etching amount on the wafer W by the N2 gas. Therefore, the substrate processing method can improve the in-plane uniformity of the wafer W.
- the flow rate of N2 gas is adjusted based on the rotational speed of wafer W (an example of substrate).
- the temperature of the wafer W can be made suitable for processing with the SPM processing liquid by adjusting the flow rate of the N2 gas according to the rotational speed of the wafer W. Therefore, the substrate processing method can improve the accuracy of the SPM processing on the wafer W.
- N2 gas an example of temperature control gas
- N2 gas is supplied from the back side of wafer W (an example of substrate).
- the substrate processing method can supply the N2 gas to portions of the wafer W where the etching amount varies locally. Therefore, the substrate processing method can suppress the occurrence of local variations in etching amount. Therefore, the substrate processing method can improve the in-plane uniformity of the wafer W.
- N2 gas is supplied from the surface side of wafer W (an example of substrate).
- the substrate processing method can adjust the temperature of the SPM processing liquid outside the wafer W in the radial direction of the portion supplied by the N2 gas. Therefore, the substrate processing method can adjust the etching amount on the radially outer side of the wafer W with respect to the portion to which the N2 gas is supplied. Therefore, the substrate processing method can suppress the occurrence of local variations in the etching amount, and can improve the in-plane uniformity of the wafer W.
- the blowing position of N2 gas (an example of temperature control gas) is adjusted by the adjustment plate 71 .
- N2 gas can be supplied by the adjustment plate 71 to locations where the etching amount varies locally. Therefore, the substrate processing method can improve the in-plane uniformity of the wafer W.
- the blowing position of N2 gas (an example of temperature control gas) is adjusted based on the target etching amount and the reference etching amount.
- the N2 gas can be supplied toward the wafer W while the blowing position of the N2 gas is adjusted so as to eliminate the difference between the target etching amount and the reference etching amount. Therefore, the substrate processing method can suppress the occurrence of variations in the etching amount of the wafer W and improve the in-plane uniformity of the wafer W.
- N2 gas (an example of temperature control gas) includes heating gas. Accordingly, in the substrate processing method, by supplying N2 gas, it is possible to increase the etching amount at a portion where the reference etching amount is smaller than the target etching amount, thereby improving the in-plane uniformity of the wafer W. can be done.
- N2 gas (an example of a temperature control gas) includes a cooling gas.
- the processing unit 16 may include, for example, a heating gas nozzle and a cooling gas nozzle as the first N2 gas supply nozzles 74 that supply N2 gas. That is, at least one of the first N2 gas supply nozzles 74 and the second N2 gas supply nozzles 82 may be provided in plurality.
- the processing unit 16 according to the modification may adjust the moving speed of the processing liquid supply nozzle 42 without adjusting the blowing position of the N2 gas.
- the processing unit 16 according to the modification may adjust the blowing position of the N2 gas without adjusting the moving speed of the processing liquid supply nozzle 42 .
- the processing unit 16 according to the modification may supply the SPM processing liquid from the central position by the processing liquid supply nozzle 42 without moving the processing liquid supply nozzle 42 from the peripheral portion of the wafer W to the central portion of the wafer W. .
- the processing unit 16 according to the modification may adjust the movement speed in the SPM processing according to the state of the wafer W before processing.
- the processing unit 16 according to the modification measures the film state of the wafer W before processing, and adjusts the movement speed in the SPM processing based on the measurement result so as to eliminate the difference between the target etching amount and the reference etching amount. adjust to
- the processing unit 16 according to the modification may adjust the flow rate of the SPM processing liquid according to the position of the wafer W in the radial direction.
- first support arm 60 first arm driving section (moving section) 70 First N2 gas supply unit 71 Adjustment plate 71a First plate 71b Second plate 74 First N2 gas supply nozzle 80 Second N2 gas supply unit 82 Second N2 gas supply nozzle W Wafer (substrate)
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Abstract
Description
図1は、実施形態に係る基板処理システム1の構成を示す図である。図1に示すように、基板処理システム1は、搬入出ステーション2と、処理ステーション3とを備える。搬入出ステーション2と処理ステーション3とは隣接して設けられる。
次に、処理ユニット16の構成について図2を参照して説明する。図2は、実施形態に係る処理ユニット16の構成を示す図である。
次に、実施形態に係る事前処理について説明する。事前処理は、基準エッチング量を取得するための処理である。事前処理は、ウェハW(基板の一例)を保持して回転させた状態で、ウェハWの中央部にSPM処理液を供給し、ウェハWの中央部のエッチング量が目標エッチング量になった場合のウェハWの径方向の位置に対応する基準エッチング量を取得する。事前処理では、処理ユニット16の保持部30にウェハWが保持されて、ウェハWが所定の回転速度で回転される。所定の回転速度は、予め設定された回転速度であり、後述する基板処理における回転速度と同じ回転速度である。
次に、実施形態に係る処理ユニット16が実行する基板処理について図4を参照し説明する。図4は、実施形態に係る処理ユニット16が実行する基板処理を説明するフローチャートである。
基板処理方法は、ウェハW(基板の一例)を保持して回転させた状態で、ウェハWの中央部に硫酸と過酸化水素との混合液であるSPM処理液を供給し、ウェハWの中央部のエッチング量が目標エッチング量になった場合のウェハWの径方向の位置に対応する基準エッチング量を取得する工程と、ウェハWの周縁部からウェハWの中央部に向けてSPM処理液の供給位置を移動させて、ウェハWにSPM処理液による処理を行う場合に、目標エッチング量と、基準エッチング量との差分を無くすように、SPM処理液を供給する供給ノズルの移動速度を調整する工程とを含む。
4 制御装置
16 処理ユニット(基板処理装置)
18 制御部
21 基板保持機構
22 処理流体供給部
30 保持部(基板保持部)
32 駆動部(回転部)
40 処理液供給部
42 処理液供給ノズル(供給ノズル)
45 第1支持アーム
60 第1アーム駆動部(移動部)
70 第1N2ガス供給部
71 調整プレート
71a 第1プレート
71b 第2プレート
74 第1N2ガス供給ノズル
80 第2N2ガス供給部
82 第2N2ガス供給ノズル
W ウェハ(基板)
Claims (13)
- 基板を保持して回転させた状態で、基板の中央部に硫酸と過酸化水素との混合液であるSPM処理液を供給し、基板の中央部のエッチング量が目標エッチング量になった場合の基板の径方向の位置に対応する基準エッチング量を取得する工程と、
基板の周縁部から基板の中央部に向けてSPM処理液の供給位置を移動させて、基板にSPM処理液による処理を行う場合に、前記目標エッチング量と、前記基準エッチング量との差分を無くすように、SPM処理液を供給する供給ノズルの移動速度を調整する工程と
を含む、基板処理方法。 - 基板に温調ガスを供給する工程
を含む、請求項1に記載の基板処理方法。 - 前記温調ガスを供給する工程は、基板の回転速度に基づいて前記温調ガスの流量を調整する、請求項2に記載の基板処理方法。
- 前記温調ガスを供給する工程は、基板の表面側から前記温調ガスを供給する、請求項2または3に記載の基板処理方法。
- 前記温調ガスを供給する工程は、基板の裏面側から前記温調ガスを供給する、請求項2または3に記載の基板処理方法。
- 前記温調ガスの吹き出し位置は、調整プレートによって調整される、請求項5に記載の基板処理方法。
- 前記温調ガスの吹き出し位置は、前記目標エッチング量、および前記基準エッチング量に基づいて調整される、請求項5に記載の基板処理方法。
- 前記温調ガスは、加温ガスを含む、請求項2または3に記載の基板処理方法。
- 前記温調ガスは、冷却ガスを含む、請求項2または3に記載の基板処理方法。
- 基板を保持する基板保持部と、
前記基板保持部を回転させる回転部と、
硫酸と過酸化水素との混合液であるSPM処理液を基板に供給する供給ノズルと、
前記供給ノズルを移動させる移動部と、
基板にSPM処理液を供給する場合に、基板の周縁部から基板の中央部に向けて前記供給ノズルが移動するように、前記移動部を制御する制御装置と
を備え、
前記制御装置は、
目標エッチング量と、基板の径方向の位置に対応する基準エッチング量との差分を無くすように、SPM処理液を供給する前記供給ノズルの移動速度を調整し、
前記基準エッチング量は、基板が保持されて回転された状態で、基板の中央部にSPM処理液が供給されて、基板の中央部のエッチング量が前記目標エッチング量になった場合の基板の径方向の位置に対応するエッチング量である、基板処理装置。 - 基板の裏面側から温調ガスを供給するガス供給部と、
基板の裏面側に設けられ、基板に向けた前記温調ガスの吹き出し位置を調整する調整プレートと
を備える、請求項10に記載の基板処理装置。 - 前記調整プレートにおける前記温調ガスの吹き出し位置は、前記目標エッチング量、および前記基準エッチング量に基づいて調整される、請求項11に記載の基板処理装置。
- 前記制御装置は、基板の回転速度に基づいて、前記温調ガスの流量を調整する、請求項11または12に記載の基板処理装置。
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JP2004158588A (ja) * | 2002-11-06 | 2004-06-03 | Dainippon Screen Mfg Co Ltd | 基板処理装置 |
JP2008258437A (ja) * | 2007-04-05 | 2008-10-23 | Dainippon Screen Mfg Co Ltd | 基板処理方法および基板処理装置 |
JP2014158014A (ja) * | 2013-01-15 | 2014-08-28 | Dainippon Screen Mfg Co Ltd | 基板処理方法および基板処理装置 |
JP2015041727A (ja) * | 2013-08-23 | 2015-03-02 | 東京エレクトロン株式会社 | 基板処理方法および基板処理装置 |
JP2016063093A (ja) * | 2014-09-18 | 2016-04-25 | 東京エレクトロン株式会社 | 基板液処理装置および基板液処理方法 |
JP2021005648A (ja) * | 2019-06-26 | 2021-01-14 | 東京エレクトロン株式会社 | 基板処理装置及び基板処理方法 |
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JP2004158588A (ja) * | 2002-11-06 | 2004-06-03 | Dainippon Screen Mfg Co Ltd | 基板処理装置 |
JP2008258437A (ja) * | 2007-04-05 | 2008-10-23 | Dainippon Screen Mfg Co Ltd | 基板処理方法および基板処理装置 |
JP2014158014A (ja) * | 2013-01-15 | 2014-08-28 | Dainippon Screen Mfg Co Ltd | 基板処理方法および基板処理装置 |
JP2015041727A (ja) * | 2013-08-23 | 2015-03-02 | 東京エレクトロン株式会社 | 基板処理方法および基板処理装置 |
JP2016063093A (ja) * | 2014-09-18 | 2016-04-25 | 東京エレクトロン株式会社 | 基板液処理装置および基板液処理方法 |
JP2021005648A (ja) * | 2019-06-26 | 2021-01-14 | 東京エレクトロン株式会社 | 基板処理装置及び基板処理方法 |
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