WO2023008024A1 - 基板洗浄装置および基板洗浄方法 - Google Patents
基板洗浄装置および基板洗浄方法 Download PDFInfo
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- WO2023008024A1 WO2023008024A1 PCT/JP2022/025407 JP2022025407W WO2023008024A1 WO 2023008024 A1 WO2023008024 A1 WO 2023008024A1 JP 2022025407 W JP2022025407 W JP 2022025407W WO 2023008024 A1 WO2023008024 A1 WO 2023008024A1
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- Prior art keywords
- substrate
- cleaning
- brush
- cleaning liquid
- liquid
- Prior art date
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- 238000004140 cleaning Methods 0.000 title claims abstract description 420
- 238000000034 method Methods 0.000 title claims description 16
- 239000007788 liquid Substances 0.000 claims description 204
- 230000002093 peripheral effect Effects 0.000 claims description 43
- 238000003825 pressing Methods 0.000 claims description 10
- 239000012530 fluid Substances 0.000 abstract description 20
- 230000014759 maintenance of location Effects 0.000 abstract 3
- 230000000717 retained effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 45
- 239000007921 spray Substances 0.000 description 26
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 20
- 238000010586 diagram Methods 0.000 description 18
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- 238000001179 sorption measurement Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000005401 electroluminescence Methods 0.000 description 4
- 239000004372 Polyvinyl alcohol Substances 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000003028 elevating effect Effects 0.000 description 3
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- 239000004810 polytetrafluoroethylene Substances 0.000 description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- SWXQKHHHCFXQJF-UHFFFAOYSA-N azane;hydrogen peroxide Chemical compound [NH4+].[O-]O SWXQKHHHCFXQJF-UHFFFAOYSA-N 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
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- 238000001035 drying Methods 0.000 description 1
- CABDFQZZWFMZOD-UHFFFAOYSA-N hydrogen peroxide;hydrochloride Chemical compound Cl.OO CABDFQZZWFMZOD-UHFFFAOYSA-N 0.000 description 1
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Images
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
- H01L21/67028—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
- H01L21/67046—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like for wet cleaning or washing using mainly scrubbing means, e.g. brushes
-
- 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
- H01L21/67—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
Definitions
- the present invention relates to a substrate cleaning apparatus and substrate cleaning method for cleaning the upper and lower surfaces of a substrate.
- FPD Fluorescence Plated Device
- substrate processing apparatuses are used to perform various types of processing on various types of substrates such as substrates for solar cells.
- a substrate cleaning apparatus is used to clean the substrate.
- the cleaning apparatus (substrate cleaning apparatus) described in Patent Document 1 includes a front surface scrubber, a back surface scrubber, and a front/rear surface reversing unit.
- the front/back inversion unit switches a substrate having a front side and a back side between a state in which the front side (device side) faces upward and a state in which the front side faces downward.
- the surface scrubber is loaded with a substrate whose front surface is turned upward by the front/back surface reversing unit.
- the substrate is rotated in a horizontal position, and a rinsing liquid (cleaning liquid) is supplied to the upward-facing surface of the substrate, and a cleaning brush is pressed against it. The surface of the substrate is thereby cleaned.
- the backside scrubber receives the substrate whose backside is directed upward by the front/backside reversing unit.
- the substrate is rotated in a horizontal position, and a rinsing liquid (cleaning liquid) is supplied to the back surface of the substrate facing upward, and a cleaning brush is pressed against it.
- the back surface of the substrate is thereby cleaned.
- An object of the present invention is to provide a substrate cleaning apparatus and a substrate cleaning method capable of reducing the amount of cleaning liquid required for cleaning the upper and lower surfaces of a substrate.
- a substrate cleaning apparatus is a substrate cleaning apparatus that cleans the upper surface and the lower surface of a substrate using a cleaning liquid.
- a first substrate holder that holds the substrate in a horizontal position without rotation, a cleaning brush configured to contact the lower surface of the substrate, and the cleaning brush that is pressed against the lower surface of the substrate held by the first substrate holder. and a brush driving section configured to be able to move the cleaning brush relative to the substrate held by the first substrate holding section;
- the first substrate holder and the brush driving unit are controlled such that the cleaning brush wetted with the cleaning liquid is pressed against the central region of the lower surface of the substrate while the cleaning brush is moved over the central region of the lower surface of the substrate in a state in which the cleaning liquid is not supplied.
- the central area of the lower surface of the substrate held by the first substrate holding part is cleaned by the cleaning brush wetted with the cleaning liquid while the cleaning liquid is not supplied to the substrate.
- the substrate is not rotating. Therefore, while the central region of the lower surface of the substrate is being cleaned, the cleaning liquid hardly reaches the outer peripheral edge of the substrate. That is, the cleaning liquid does not flow from the bottom surface of the substrate to the top surface of the substrate. Therefore, it is not necessary to supply the cleaning liquid to the upper surface of the substrate in order to protect the peripheral edge of the upper surface of the substrate. As a result, it is possible to reduce the amount of cleaning liquid required for cleaning the upper and lower surfaces of the substrate.
- the substrate cleaning apparatus further includes a first lower surface liquid supply section that supplies cleaning liquid to the central area of the lower surface of the substrate held by the first substrate holding section, and the control section cleans the central area of the lower surface of the substrate.
- a first lower surface liquid supply section that supplies cleaning liquid to the central area of the lower surface of the substrate held by the first substrate holding section, and the control section cleans the central area of the lower surface of the substrate.
- the cleaning brush Before the brush is pressed against the substrate held by the first substrate holder, the cleaning brush is positioned below the central region of the lower surface of the substrate, and the cleaning liquid is supplied to the central region of the lower surface of the substrate. 1 undersurface liquid supply may be controlled.
- the cleaning liquid is supplied to the central area of the lower surface of the substrate before the cleaning brush is pressed against the central area of the lower surface of the substrate. Also, at this time, the cleaning brush is positioned below the central region of the bottom surface of the substrate. Therefore, the cleaning liquid supplied to the central region of the bottom surface of the substrate drops from the bottom surface of the substrate onto the cleaning brush. This wets the cleaning brushes and the bottom central region of the substrate. As a result, the central area of the lower surface of the substrate is smoothly cleaned by the cleaning brush.
- the substrate cleaning apparatus includes: a second substrate holding unit that holds the substrate in a horizontal position by sucking the central region of the lower surface of the substrate and rotates the substrate around a vertically extending axis; and the second substrate holding unit. and a second lower surface liquid supply unit that supplies cleaning liquid to an outer area of the lower surface surrounding the central area of the lower surface of the substrate held by the second substrate holding unit.
- the brush driving section is configured to be able to further press the cleaning brush against the lower surface outer region of the substrate held by the second substrate holding section;
- the second substrate holding part and the upper surface liquid supply are arranged such that the cleaning brush is pressed against the lower surface outer area of the substrate while the cleaning liquid is supplied to the upper surface of the rotating substrate and to the lower surface outer area of the substrate. section, the second undersurface liquid supply section and the brush drive section.
- the cleaning liquid supplied to the outer region of the lower surface of the substrate functions as a back rinse to prevent the cleaning liquid supplied to the upper surface of the substrate from flowing around to the lower surface of the substrate together with the cleaning liquid for cleaning the outer region of the lower surface of the substrate. do. Therefore, it is not necessary to separately supply the cleaning liquid for cleaning the outer region of the lower surface of the substrate and the back rinse for preventing the cleaning liquid supplied to the upper surface of the substrate from running around to the lower surface of the substrate. As a result, the consumption of cleaning liquid can be reduced.
- the cleaning brush is a lower surface brush used for cleaning the lower surface of the substrate.
- the lower surface brush has a base portion having a flat surface facing upward, and a base portion projecting upward from the flat surface of the base portion and extending along the outer edge of the base portion. It may also include a first cleaning portion provided on the flat surface of the base portion so as to follow.
- the cleaning liquid can be stored in the area inside the first cleaning portion of the lower surface brush before cleaning the central area of the lower surface of the substrate.
- the cleaning liquid can be stored in the area inside the first cleaning portion of the lower surface brush before cleaning the central area of the lower surface of the substrate.
- the lower surface brush has a second cleaning portion provided on the flat surface of the base portion so as to project upward from the flat surface of the base portion and extend in one direction through the geometric center of the base portion in plan view. It may contain further.
- the contact area of the lower surface brush with the substrate increases compared to the configuration in which only the first cleaning section is formed on the base section. Thereby, a higher cleaning power can be obtained for the lower surface of the substrate.
- a substrate cleaning method is a substrate cleaning method for cleaning the upper and lower surfaces of a substrate using a cleaning liquid, wherein the first substrate abuts on a plurality of portions of the outer peripheral edge of the substrate.
- the central area of the lower surface of the substrate held by the first substrate holding part is cleaned with a cleaning brush wetted with the cleaning liquid while the cleaning liquid is not supplied to the substrate.
- the substrate is not rotating. Therefore, while the central region of the lower surface of the substrate is being cleaned, the cleaning liquid hardly reaches the outer peripheral edge of the substrate. That is, the cleaning liquid does not flow from the bottom surface of the substrate to the top surface of the substrate. Therefore, it is not necessary to supply the cleaning liquid to the upper surface of the substrate in order to protect the peripheral edge of the upper surface of the substrate. As a result, it is possible to reduce the amount of cleaning liquid required for cleaning the upper and lower surfaces of the substrate.
- the substrate cleaning method is a state in which the cleaning brush is positioned below the central region of the lower surface of the substrate held by the first substrate holder before the cleaning brush is pressed against the central region of the lower surface of the substrate.
- the step of supplying a cleaning fluid to the central region may also be included.
- the cleaning liquid is supplied to the central area of the lower surface of the substrate before the cleaning brush is pressed against the central area of the lower surface of the substrate. Also, at this time, the cleaning brush is positioned below the central region of the bottom surface of the substrate. Therefore, the cleaning liquid supplied to the central region of the bottom surface of the substrate drops from the bottom surface of the substrate onto the cleaning brush. This wets the cleaning brushes and the bottom central region of the substrate. As a result, the central area of the lower surface of the substrate is smoothly cleaned by the cleaning brush.
- a substrate cleaning method includes the steps of: holding a substrate in a horizontal position by using a second substrate holding part that sucks a central region of the lower surface of the substrate and rotating the substrate around an axis extending in the vertical direction; a step of supplying a cleaning liquid to the upper surface of the substrate that is held by the holding part and rotating; and surrounding a central area of the lower surface of the substrate that is held by the second substrate holding part and rotating while the cleaning liquid is supplied to the upper surface of the substrate.
- the step of pressing the cleaning brush against the bottom surface of the substrate and moving the cleaning brush relative to the substrate includes supplying the cleaning fluid to the top surface of the substrate rotated by the second substrate holder. and moving the cleaning brush over the lower surface outer region of the substrate while pressing against the lower surface outer region of the substrate while the cleaning liquid is supplied to the lower surface outer region of the substrate.
- the cleaning liquid supplied to the outer region of the lower surface of the substrate functions as a back rinse to prevent the cleaning liquid supplied to the upper surface of the substrate from flowing around to the lower surface of the substrate together with the cleaning liquid for cleaning the outer region of the lower surface of the substrate. do. Therefore, it is not necessary to separately supply the cleaning liquid for cleaning the outer region of the lower surface of the substrate and the back rinse for preventing the cleaning liquid supplied to the upper surface of the substrate from running around to the lower surface of the substrate. As a result, the consumption of cleaning liquid can be reduced.
- the cleaning brush is a lower surface brush used for cleaning the lower surface of the substrate, and the lower surface brush includes a base portion having a flat surface facing upward, and a base portion projecting upward from the flat surface of the base portion and extending along the outer edge of the base portion. and a first cleaning portion provided along the flat surface of the base portion.
- the cleaning liquid can be stored in the area inside the first cleaning portion of the lower surface brush before cleaning the central area of the lower surface of the substrate.
- the central region of the bottom surface of the substrate is smoothly cleaned by the cleaning fluid stored inside the first cleaning portion of the bottom surface brush while the cleaning fluid is not supplied to the bottom surface of the substrate.
- the lower surface brush has a second cleaning portion provided on the flat surface of the base portion so as to protrude upward from the flat surface of the base portion and extend in one direction through the geometric center of the base portion in plan view. It may contain further.
- the contact area of the lower surface brush with the substrate increases compared to the configuration in which only the first cleaning section is formed on the base section. Thereby, a higher cleaning power can be obtained for the lower surface of the substrate.
- FIG. 1 is a schematic plan view of a substrate cleaning apparatus according to one embodiment of the present invention.
- 2 is an external perspective view showing the internal configuration of the substrate cleaning apparatus of FIG. 1.
- FIG. 3 is a block diagram showing the configuration of the control system of the substrate cleaning apparatus of FIG.
- FIG. 4 is a schematic diagram for explaining the schematic operation of the substrate cleaning apparatus of FIG.
- FIG. 5 is a schematic diagram for explaining the schematic operation of the substrate cleaning apparatus of FIG.
- FIG. 6 is a schematic diagram for explaining the schematic operation of the substrate cleaning apparatus of FIG.
- FIG. 7 is a schematic diagram for explaining the schematic operation of the substrate cleaning apparatus of FIG.
- FIG. 8 is a schematic diagram for explaining the schematic operation of the substrate cleaning apparatus of FIG. FIG.
- FIG. 9 is a schematic diagram for explaining the schematic operation of the substrate cleaning apparatus of FIG.
- FIG. 10 is a schematic diagram for explaining the schematic operation of the substrate cleaning apparatus of FIG.
- FIG. 11 is a schematic diagram for explaining the schematic operation of the substrate cleaning apparatus of FIG.
- FIG. 12 is a schematic diagram for explaining the schematic operation of the substrate cleaning apparatus of FIG.
- FIG. 13 is a schematic diagram for explaining the schematic operation of the substrate cleaning apparatus of FIG.
- FIG. 14 is a schematic diagram for explaining the schematic operation of the substrate cleaning apparatus of FIG.
- FIG. 15 is a schematic diagram for explaining the schematic operation of the substrate cleaning apparatus of FIG.
- FIG. 16 is a schematic diagram for explaining the schematic operation of the substrate cleaning apparatus of FIG. FIG.
- FIG. 17 is a diagram for explaining the main effect of the present invention obtained by a series of operations of the substrate cleaning apparatus shown in FIGS. 4-16.
- FIG. 18 is an external perspective view showing a preferred configuration example of the brush unit.
- 19 is an external perspective view of the lower surface brush of FIG. 18.
- FIG. 20 is a plan view of the bottom brush of FIG. 18.
- FIG. 21 is a longitudinal sectional view of the brush unit of FIG. 18.
- the substrate means a semiconductor substrate, a substrate for FPD (Flat Panel Display) such as a liquid crystal display device or an organic EL (Electro Luminescence) display device, an optical disk substrate, a magnetic disk substrate, a magneto-optical disk substrate, A photomask substrate, a ceramic substrate, a solar cell substrate, or the like.
- FPD Fluorescence Panel Display
- the substrate used in this embodiment has at least a part of the circular outer peripheral portion.
- the perimeter has a circular shape, except for the positioning notches.
- FIG. 1 is a schematic plan view of a substrate cleaning apparatus according to an embodiment of the present invention.
- FIG. 2 is an external perspective view showing the internal configuration of the substrate cleaning apparatus 1 of FIG.
- X, Y and Z directions which are perpendicular to each other are defined to clarify the positional relationship.
- the X, Y and Z directions are appropriately indicated by arrows.
- the X and Y directions are perpendicular to each other in the horizontal plane, and the Z direction corresponds to the vertical direction.
- the substrate cleaning apparatus 1 includes upper holding devices 10A and 10B, a lower holding device 20, a pedestal device 30, a transfer device 40, a lower cleaning device 50, a cup device 60, an upper cleaning device 70, an end A cleaning device 80 and an opening/closing device 90 are provided. These components are provided within the unit housing 2 . In FIG. 2, the unit housing 2 is indicated by dotted lines.
- the unit housing 2 has a rectangular bottom portion 2a and four side wall portions 2b, 2c, 2d, and 2e extending upward from four sides of the bottom portion 2a. Side wall portions 2b and 2c face each other, and side wall portions 2d and 2e face each other. A rectangular opening is formed in the central portion of the side wall portion 2b. This opening serves as a loading/unloading port 2 x for the substrate W, and is used when the substrate W is loaded into and unloaded from the unit housing 2 . In FIG. 2, the loading/unloading port 2x is indicated by a thick dotted line.
- the direction from the inside of the unit housing 2 to the outside of the unit housing 2 through the loading/unloading port 2x (the direction from the side wall portion 2c to the side wall portion 2b) is referred to as the front.
- the opposite direction (the direction facing the side wall portion 2c from the side wall portion 2b) is called rearward.
- An opening/closing device 90 is provided in a portion of the side wall portion 2b where the loading/unloading port 2x is formed and in a region in the vicinity thereof.
- the opening/closing device 90 includes a shutter 91 capable of opening and closing the loading/unloading port 2x, and a shutter driving section 92 that drives the shutter 91.
- the shutter 91 is indicated by a thick two-dot chain line.
- the shutter drive unit 92 drives the shutter 91 so as to open the loading/unloading port 2 x when the substrate W is loaded into and unloaded from the substrate cleaning apparatus 1 .
- the shutter driving section 92 drives the shutter 91 so as to close the loading/unloading port 2 x during cleaning of the substrate W in the substrate cleaning apparatus 1 .
- a pedestal device 30 is provided in the central portion of the bottom portion 2a.
- the pedestal device 30 includes a linear guide 31 , a movable pedestal 32 and a pedestal driving section 33 .
- the linear guide 31 includes two rails and extends in the Y direction from the vicinity of the side wall portion 2b to the vicinity of the side wall portion 2c in a plan view.
- the movable pedestal 32 is provided so as to be movable in the Y direction on the two rails of the linear guide 31 .
- the pedestal drive unit 33 includes, for example, a pulse motor, and moves the movable pedestal 32 on the linear guide 31 in the Y direction.
- the lower holding device 20 On the movable pedestal 32, the lower holding device 20 and the lower cleaning device 50 are provided so as to line up in the Y direction.
- the lower holding device 20 includes a suction holding section 21 , a suction holding driving section 22 and two back rinse nozzles 29 .
- the suction holding unit 21 is a so-called spin chuck, has a circular suction surface capable of holding the lower surface of the substrate W by suction, and is configured to be rotatable around a vertically extending axis (axis in the Z direction).
- a region of the lower surface of the substrate W to be adsorbed by the adsorption surface of the adsorption holding portion 21 when the substrate W is adsorbed and held by the adsorption holding portion 21 is referred to as a lower surface central region.
- the area surrounding the central area of the lower surface of the lower surface of the substrate W is called the outer area of the lower surface.
- the suction holding drive unit 22 includes a motor.
- the motor of the suction holding drive unit 22 is provided on the movable base 32 so that the rotating shaft protrudes upward.
- the suction holding portion 21 is attached to the upper end portion of the rotating shaft of the suction holding driving portion 22 .
- a suction path for sucking and holding the substrate W in the suction holding unit 21 is formed in the rotating shaft of the suction holding driving unit 22 .
- the suction path is connected to a suction device (not shown).
- the suction holding driving section 22 rotates the suction holding section 21 around the rotation axis.
- the two back rinse nozzles 29 are arranged near the suction holding driving section 22 so as to sandwich the suction holding section 21 in the X direction in plan view.
- Each back rinse nozzle 29 is connected to a back rinse liquid supply section 28 (FIG. 3).
- the back rinse liquid supply unit 28 supplies the cleaning liquid to the back rinse nozzle 29 .
- the back rinse nozzle 29 applies the cleaning liquid supplied from the back rinse liquid supply unit 28 to the substrate W when the substrate W is cleaned at the same time by the substrate cleaning apparatus 1 at the upper surface, the outer peripheral end portion, and the lower surface outer region of the substrate W. It is discharged toward the lower surface outer region of the.
- pure water DIW: De-Ionized Water
- DIW De-Ionized Water
- a delivery device 40 is further provided near the lower holding device 20 on the movable pedestal 32 .
- the delivery device 40 includes a plurality (three in this example) of support pins 41 , pin connecting members 42 and pin lifting drive units 43 .
- the pin connecting member 42 is formed to surround the suction holding portion 21 in plan view, and connects the plurality of support pins 41 .
- the plurality of support pins 41 are connected to each other by the pin connecting member 42 and extend upward from the pin connecting member 42 by a certain length.
- the pin elevating drive section 43 elevates the pin connecting member 42 on the movable base 32 . As a result, the plurality of support pins 41 move up and down relative to the suction holding portion 21 .
- the lower surface cleaning device 50 includes a lower surface brush 51, two liquid nozzles 52, a gas ejection portion 53, an elevation support portion 54, a movement support portion 55, a lower surface brush rotation drive portion 55a, a lower surface brush elevation drive portion 55b, and a lower surface brush movement drive portion. 55c.
- the movement support part 55 is provided so as to be movable in the Y direction with respect to the lower holding device 20 within a certain area on the movable base 32 . As shown in FIG. 2, on the movement support part 55, the raising/lowering support part 54 is provided so that raising/lowering is possible.
- the lifting support portion 54 has an upper surface 54u that slopes obliquely downward in a direction away from the suction holding portion 21 (rearward in this example).
- the lower surface brush 51 has a circular outer shape in plan view, and is relatively large in the present embodiment. Specifically, the diameter of the lower surface brush 51 is larger than the diameter of the suction surface of the suction holding portion 21 , for example, 1.3 times the diameter of the suction surface of the suction holding portion 21 . In addition, the diameter of the lower surface brush 51 is larger than 1/3 and smaller than 1/2 of the diameter of the substrate W. As shown in FIG. In addition, the diameter of the substrate W is, for example, 300 mm.
- the lower brush 51 is made of a relatively soft resin material such as PVA (polyvinyl alcohol) or PTFE (polytetrafluoroethylene).
- the lower surface brush 51 has a cleaning surface that can come into contact with the lower surface of the substrate W. As shown in FIG.
- the lower surface brush 51 is arranged on the upper surface 54u of the elevating support 54 so that the surface to be washed faces upward and is rotatable around an axis extending vertically through the center of the surface to be washed. is provided in
- Each of the two liquid nozzles 52 is mounted on the upper surface 54u of the lifting support part 54 so that it is located near the lower brush 51 and the liquid discharge port faces upward from the lower brush 51.
- the liquid nozzle 52 is connected to a lower surface cleaning liquid supply section 56 (FIG. 3).
- the lower cleaning liquid supply unit 56 supplies cleaning liquid to the liquid nozzle 52 .
- the liquid nozzle 52 discharges the cleaning liquid supplied from the lower surface cleaning liquid supply unit 56 to the lower surface central area of the substrate W immediately before the substrate W cleaning apparatus 1 cleans the lower surface central area.
- the liquid nozzle 52 does not discharge the cleaning liquid to the central region of the lower surface of the substrate W while the central region of the lower surface of the substrate W is being cleaned in the substrate cleaning apparatus 1 .
- pure water DIW
- DIW pure water
- the gas ejection part 53 is a slit-shaped gas ejection nozzle having a gas ejection port extending in one direction.
- the gas ejection part 53 is positioned between the lower surface brush 51 and the adsorption holding part 21 in a plan view, and is attached to the upper surface 54u of the elevation support part 54 so that the gas ejection port faces upward.
- a jetting gas supply portion 57 ( FIG. 3 ) is connected to the gas jetting portion 53 .
- the jetting gas supply unit 57 supplies gas to the gas jetting unit 53 .
- an inert gas such as nitrogen gas is used as the gas supplied to the gas ejection part 53 .
- the gas ejection part 53 injects the gas supplied from the ejection gas supply part 57 to the bottom surface of the substrate W when the bottom surface brush 51 cleans the substrate W and dries the bottom surface of the substrate W, which will be described later.
- a strip-shaped gas curtain extending in the X direction is formed between the lower surface brush 51 and the suction holding portion 21 .
- the lower surface brush rotation driving unit 55a includes a motor, and rotates the lower surface brush 51 when the substrate W is cleaned by the lower surface brush 51.
- the lower surface brush elevation driving section 55 b includes a stepping motor or an air cylinder, and raises and lowers the elevation support section 54 with respect to the movement support section 55 .
- the lower surface brush movement drive section 55c includes a motor, and moves the movement support section 55 on the movable base 32 in the Y direction.
- the position of the lower holding device 20 on the movable base 32 is fixed. Therefore, when the movement support portion 55 is moved in the Y direction by the lower surface brush movement driving portion 55c, the movement support portion 55 moves relative to the lower holding device 20.
- the position of the lower cleaning device 50 on the movable pedestal 32 when it comes closest to the lower holding device 20 is called an approach position
- the lower cleaning device 50 on the movable pedestal 32 when it is furthest away from the lower holding device 20 is called an approach position
- the position of device 50 is called the spaced position.
- a cup device 60 is further provided in the central portion of the bottom portion 2a.
- Cup device 60 includes cup 61 and cup drive 62 .
- the cup 61 is provided so as to surround the lower holding device 20 and the pedestal device 30 in plan view and can be raised and lowered. In FIG. 2 the cup 61 is shown in dashed lines.
- the cup drive unit 62 moves the cup 61 between the lower cup position and the upper cup position depending on which portion of the lower surface of the substrate W is to be cleaned by the lower surface brush 51 .
- the lower cup position is a height position where the upper end of the cup 61 is below the substrate W sucked and held by the suction holding portion 21 .
- the upper cup position is a height position where the upper end of the cup 61 is higher than the suction holding portion 21 .
- the upper holding device 10A includes a lower chuck 11A, an upper chuck 12A, a lower chuck driving section 13A and an upper chuck driving section 14A.
- the upper holding device 10B includes a lower chuck 11B, an upper chuck 12B, a lower chuck driving section 13B and an upper chuck driving section 14B.
- the lower chucks 11A and 11B are arranged symmetrically with respect to a vertical plane extending in the Y direction (front-rear direction) through the center of the suction holding portion 21 in plan view, and are provided movably in the X direction within a common horizontal plane. .
- Each of the lower chucks 11A and 11B has two supporting pieces capable of supporting the peripheral portion of the lower surface of the substrate W from below.
- the lower chuck drive units 13A and 13B move the lower chucks 11A and 11B so that the lower chucks 11A and 11B approach each other or move away from each other.
- the upper chucks 12A and 12B are arranged symmetrically with respect to a vertical plane extending in the Y direction (front-rear direction) through the center of the suction holding portion 21 in a plan view. It is provided so as to be movable in the direction.
- Each of the upper chucks 12A and 12B has two holding pieces configured to be able to hold the outer peripheral edge of the substrate W by contacting two portions of the outer peripheral edge of the substrate W.
- the upper chuck drive units 14A, 14B move the upper chucks 12A, 12B so that the upper chucks 12A, 12B come closer to each other or move away from each other.
- an upper surface cleaning device 70 is provided so as to be positioned near the upper holding device 10B in plan view.
- the upper surface cleaning device 70 includes a rotary support shaft 71 , an arm 72 , a spray nozzle 73 and an upper surface cleaning drive section 74 .
- the rotation support shaft 71 is supported by the upper surface cleaning drive unit 74 so as to extend vertically, move up and down, and rotate on the bottom surface portion 2a.
- the arm 72 is provided so as to extend horizontally from the upper end of the rotation support shaft 71 at a position above the upper holding device 10B.
- a spray nozzle 73 is attached to the tip of the arm 72 .
- the spray nozzle 73 is connected to an upper surface cleaning fluid supply portion 75 (FIG. 3).
- a top cleaning fluid supply 75 supplies cleaning fluid and gas to the spray nozzles 73 .
- pure water (DIW) is used as the cleaning liquid supplied to the spray nozzle 73
- an inert gas such as nitrogen gas is used as the gas supplied to the spray nozzle 73.
- FIG. 3 When cleaning the upper surface of the substrate W, the spray nozzle 73 mixes the cleaning liquid supplied from the upper surface cleaning fluid supply unit 75 and the gas to generate mixed fluid, and sprays the generated mixed fluid downward.
- the upper surface cleaning drive unit 74 includes one or more pulse motors, air cylinders, and the like, moves the rotation support shaft 71 up and down, and rotates the rotation support shaft 71 . According to the above configuration, the entire upper surface of the substrate W can be cleaned by moving the spray nozzle 73 in an arc on the upper surface of the substrate W that is rotated while being sucked and held by the suction holding unit 21 .
- an edge cleaning device 80 is provided so as to be positioned near the upper holding device 10A in plan view.
- the edge cleaning device 80 includes a rotating support shaft 81 , an arm 82 , a bevel brush 83 and a bevel brush driving section 84 .
- the rotation support shaft 81 is supported by a bevel brush driving section 84 so as to extend vertically, move up and down, and rotate on the bottom surface portion 2a.
- the arm 82 is provided so as to extend horizontally from the upper end of the rotation support shaft 81 at a position above the upper holding device 10A.
- a bevel brush 83 is provided at the tip of the arm 82 so as to protrude downward and be rotatable around a vertical axis.
- the upper half of the bevel brush 83 has an inverted truncated cone shape and the lower half has a truncated cone shape. According to this bevel brush 83, the outer peripheral end portion of the substrate W can be cleaned at the central portion in the vertical direction of the outer peripheral surface.
- the bevel brush drive unit 84 includes one or more pulse motors, air cylinders, and the like, raises and lowers the rotation support shaft 81, and rotates the rotation support shaft 81. According to the above configuration, the entire outer peripheral edge of the substrate W is cleaned by bringing the central portion of the outer peripheral surface of the bevel brush 83 into contact with the outer peripheral edge of the substrate W that is rotated while being sucked and held by the suction holding unit 21 . be able to.
- the bevel brush drive unit 84 further includes a motor built into the arm 82.
- the motor rotates a bevel brush 83 provided at the tip of the arm 82 around a vertical axis. Therefore, when the outer peripheral edge of the substrate W is cleaned, the cleaning power of the bevel brush 83 at the outer peripheral edge of the substrate W is improved by rotating the bevel brush 83 .
- FIG. 3 is a block diagram showing the configuration of the control system of the substrate cleaning apparatus 1 of FIG.
- the control unit 9 in FIG. 3 includes a CPU (Central Processing Unit), RAM (Random Access Memory), ROM (Read Only Memory) and a storage device.
- RAM is used as a work area for the CPU.
- the ROM stores system programs.
- the storage device stores a control program. The operation of each part of the substrate cleaning apparatus 1 is controlled by the CPU executing the substrate cleaning program stored in the storage device on the RAM.
- the control unit 9 mainly receives the substrate W carried into the substrate cleaning apparatus 1 and holds it at a position above the suction holding unit 21 . It controls the chuck drive units 14A and 14B. Further, the control unit 9 mainly controls the suction-hold driving unit 22 so that the suction-holding unit 21 sucks and holds the substrate W and rotates the suction-held substrate W. As shown in FIG. Further, the control unit 9 controls the back rinse liquid supply unit 28 mainly to prevent the cleaning liquid from flowing from the top surface to the bottom surface and to clean the outer region of the bottom surface of the substrate W when cleaning the top surface of the substrate W. do.
- the control unit 9 also controls the pedestal driving unit 33 mainly to move the movable pedestal 32 with respect to the substrate W held by the upper holding devices 10A and 10B. Further, the control unit 9 is used to move the substrate W between the height position of the substrate W held by the upper holding devices 10A and 10B and the height position of the substrate W held by the suction holding unit 21. , and controls the pin lifting drive unit 43 .
- control unit 9 controls the lower surface brush rotation driving unit 55a, the lower surface brush elevation driving unit 55b, the lower surface brush movement driving unit 55c, the lower surface cleaning liquid supply unit 56, and the jet gas supply unit 57. Control. Further, the control unit 9 controls the cup driving unit 62 so that the cup 61 receives the cleaning liquid that scatters from the substrate W when the substrate W sucked and held by the sucking and holding unit 21 is cleaned.
- control unit 9 controls the upper surface cleaning drive unit 74 and the upper surface cleaning fluid supply unit 75 in order to clean the upper surface of the substrate W adsorbed and held by the adsorption holding unit 21 . Further, the control unit 9 controls the bevel brush driving unit 84 in order to clean the outer peripheral edge of the substrate W adsorbed and held by the adsorption holding unit 21 . Furthermore, the control section 9 controls the shutter drive section 92 to open and close the loading/unloading port 2x of the unit housing 2 when the substrate W is loaded into and unloaded from the substrate cleaning apparatus 1 .
- FIGS. 4 to 16 are schematic diagrams for explaining the general operation of the substrate cleaning apparatus 1 of FIG.
- a plan view of substrate cleaning apparatus 1 is shown at the top.
- a side view of the lower holding device 20 and its peripheral portion viewed along the Y direction is shown in the middle row
- a side view of the lower holding device 20 and its peripheral portion seen along the X direction is shown in the lower row.
- the side view in the middle row corresponds to the side view along line AA in FIG. 1
- the side view in the lower row corresponds to the side view along line BB in FIG.
- the scale of some components is different between the upper plan view and the middle and lower side views. . 4 to 16, the cup 61 is indicated by a two-dot chain line, and the outline of the substrate W is indicated by a thick one-dot chain line.
- the shutter 91 of the opening/closing device 90 closes the loading/unloading port 2x.
- the lower chucks 11A and 11B are maintained in a state where the distance between them is sufficiently larger than the diameter of the substrate W, as shown in FIG.
- the upper chucks 12A and 12B are also maintained in a state where the distance between them is sufficiently larger than the diameter of the substrate W.
- the movable base 32 of the base device 30 is arranged so that the center of the suction holding portion 21 is positioned at the center of the cup 61 in plan view.
- the undersurface cleaning device 50 is arranged at the approach position.
- the up-and-down support portion 54 of the lower surface cleaning device 50 has a cleaning surface (upper end portion) of the lower surface brush 51 positioned below the suction holding portion 21 .
- the plurality of support pins 41 are positioned below the suction holding portion 21 .
- cup 61 is in the lower cup position.
- the center position of the cup 61 in plan view will be referred to as a plane reference position rp.
- the position of the movable base 32 on the bottom surface portion 2a when the center of the suction holding portion 21 is at the plane reference position rp in plan view is called a first horizontal position.
- a substrate W is carried into the unit housing 2 of the substrate cleaning apparatus 1 .
- the shutter 91 opens the loading/unloading port 2x.
- the hand (substrate holder) RH of the substrate transport robot (not shown) loads the substrate W into the unit housing 2 at a substantially central position through the loading/unloading port 2x.
- the substrate W held by the hand RH is positioned between the lower chuck 11A and upper chuck 12A and the lower chuck 11B and upper chuck 12B, as shown in FIG.
- the lower chucks 11A and 11B approach each other so that the plurality of supporting pieces of the lower chucks 11A and 11B are positioned below the peripheral edge of the lower surface of the substrate W, as indicated by a thick solid arrow a2 in FIG.
- the hand RH descends and exits from the carry-in/carry-out opening 2x.
- a plurality of portions of the peripheral portion of the lower surface of the substrate W held by the hand RH are supported by the plurality of supporting pieces of the lower chucks 11A and 11B.
- the shutter 91 closes the loading/unloading port 2x.
- the upper chucks 12A and 12B approach each other so that the plurality of holding pieces of the upper chucks 12A and 12B come into contact with the outer peripheral edge of the substrate W, as indicated by the thick solid arrow a3 in FIG.
- a plurality of holding pieces of the upper chucks 12A and 12B abut against a plurality of portions of the outer periphery of the substrate W, so that the substrate W supported by the lower chucks 11A and 11B is further held by the upper chucks 12A and 12B.
- the movable pedestal 32 is moved so that the suction holding portion 21 is displaced from the plane reference position rp by a predetermined distance and the center of the lower surface brush 51 is positioned at the plane reference position rp. Move forward from the horizontal position of 1. As a result, the cleaning surface of the lower surface brush 51 faces the central region of the lower surface of the substrate W held by the upper chucks 12A and 12B at a position below the substrate W. As shown in FIG. At this time, the position of the movable pedestal 32 located on the bottom surface portion 2a is called a second horizontal position.
- the liquid nozzle 52 discharges the cleaning liquid upward from the lower surface brush 51 as indicated by the white arrow AA in the lower part of FIG.
- the cleaning liquid discharged from the liquid nozzle 52 collides with the central region of the lower surface of the substrate W. As shown in FIG. As a result, the central area of the lower surface of the substrate W is wetted with the cleaning liquid.
- the flow rate of the cleaning liquid discharged from the liquid nozzle 52 (the flow rate of the cleaning liquid discharged per unit time) is determined to such an extent that the cleaning liquid supplied to the central region of the lower surface of the substrate W does not reach the outer peripheral edge of the substrate W.
- the lower surface brush 51 wetted with the cleaning liquid rotates (rotates) around the vertical axis.
- the rotation speed of the lower surface brush 51 is set within a range of, for example, 100 rpm or more and 250 rpm or less.
- FIG. 8 An enlarged side view of the part where the lower surface brush 51 contacts the lower surface of the substrate W is shown in a balloon.
- the liquid nozzle 52 and the gas ejection part 53 are held in a position close to the lower surface of the substrate W while the lower surface brush 51 is in contact with the substrate W.
- the cleaning liquid is not discharged onto the substrate W from the liquid nozzle 52 .
- the upper surface 54u of the lifting support portion 54 is inclined downward in the direction away from the suction holding portion 21. As shown in FIG. In this case, when the cleaning liquid containing contaminants falls from the lower surface of the substrate W onto the lift support section 54 , the cleaning liquid received by the upper surface 54 u is guided away from the adsorption holding section 21 .
- the gas ejecting portion 53 is positioned between the lower surface brush 51 and the suction holding portion 21 as indicated by the white arrow a52 in the blowout in FIG.
- the gas is jetted toward the lower surface of the substrate W at the position.
- the gas ejection part 53 is mounted on the elevation support part 54 so that the gas ejection port extends in the X direction.
- a band-shaped gas curtain extending in the X direction is formed between the bottom brush 51 and the suction holding portion 21 .
- the cleaning liquid containing the contaminants is prevented from scattering toward the adsorption holding portion 21 when the lower surface brush 51 is used to clean the central region of the lower surface of the substrate W.
- FIG. Accordingly, when the lower surface central region of the substrate W is cleaned by the lower surface brush 51, the cleaning liquid containing contaminants is prevented from adhering to the suction holding portion 21, and the suction surface of the suction holding portion 21 is kept clean.
- the gas jetting portion 53 jets the gas obliquely upward toward the lower surface brush 51 as indicated by the white arrow a52.
- the gas ejection part 53 may eject the gas from the gas ejection part 53 toward the lower surface of the substrate W along the Z direction.
- the movable pedestal 32 moves backward so that the suction holding portion 21 is positioned at the plane reference position rp. That is, the movable base 32 moves from the second horizontal position to the first horizontal position.
- the central region of the lower surface of the substrate W is sequentially dried by the gas curtain by continuing the gas jetting from the gas jetting part 53 to the substrate W. As shown in FIG.
- the lift support portion 54 descends so that the cleaning surface of the lower surface brush 51 is positioned below the suction surface (upper end portion) of the suction holding portion 21. . 10
- the upper chucks 12A and 12B move away from each other so that the plurality of holding pieces of the upper chucks 12A and 12B are separated from the outer peripheral edge of the substrate W, as indicated by a thick solid arrow a9.
- the substrate W is in a state of being supported by the lower chucks 11A and 11B.
- the pin connecting member 42 rises so that the upper ends of the plurality of support pins 41 are positioned slightly above the lower chucks 11A and 11B. Thereby, the substrate W supported by the lower chucks 11A and 11B is received by the multiple support pins 41 .
- the lower chucks 11A and 11B move away from each other, as indicated by a thick solid arrow a11 in FIG. At this time, the lower chucks 11A and 11B move to positions where they do not overlap the substrate W supported by the plurality of support pins 41 in plan view. As a result, both the upper holding devices 10A and 10B return to their initial states.
- the pin connecting member 42 descends so that the upper ends of the plurality of support pins 41 are positioned below the suction holding portion 21, as indicated by a thick solid arrow a12 in FIG. Thereby, the substrate W supported on the plurality of support pins 41 is received by the suction holder 21 . In this state, the suction holding part 21 sucks and holds the central region of the lower surface of the substrate W. As shown in FIG. Simultaneously with the descent of the pin connecting member 42 or after the pin connecting member 42 has been lowered, the cup 61 rises from the lower cup position to the upper cup position as indicated by the thick solid arrow a13 in FIG.
- the suction holding portion 21 rotates around the vertical axis (the axial center of the rotary shaft of the suction holding drive portion 22).
- the substrate W sucked and held by the suction holding portion 21 rotates in a horizontal posture.
- the back rinse nozzle 29 discharges the cleaning liquid toward the lower surface outer region of the substrate W, as indicated by the outline arrow AB in the middle of FIG.
- the cleaning liquid discharged from the back rinse nozzle 29 spreads over the entire lower surface outer region of the substrate W and scatters to the outside of the substrate W.
- the rotation support shaft 71 of the upper surface cleaning device 70 rotates and descends. 13, the spray nozzle 73 moves to a position above the center of the substrate W, and the distance between the spray nozzle 73 and the substrate W becomes the predetermined distance. descend as far as possible. In this state, the spray nozzle 73 sprays the mixed fluid of the cleaning liquid and the gas onto the upper surface of the substrate W. As shown in FIG. Also, the rotation support shaft 71 rotates. Further, as indicated by a thick solid arrow a16 in FIG. 13, the spray nozzle 73 moves outward from the center of the rotating substrate W. As shown in FIG. By spraying the mixed fluid onto the entire upper surface of the substrate W, the entire upper surface of the substrate W is cleaned. When cleaning the upper surface of the substrate W, the cleaning liquid supplied from the back rinse nozzle 29 to the outer region of the lower surface of the substrate W prevents the cleaning liquid from flowing from the upper surface of the substrate W to the lower surface of the substrate W.
- the rotation support shaft 81 of the edge cleaning device 80 also rotates and descends.
- the bevel brush 83 moves to a position above the outer peripheral edge of the substrate W, as indicated by a thick solid arrow a17 in FIG.
- the bevel brush 83 descends so that the central portion of the outer peripheral surface of the bevel brush 83 comes into contact with the outer peripheral edge of the substrate W.
- the bevel brush 83 rotates (rotates) around the vertical axis.
- contaminants adhering to the outer peripheral edge of the substrate W are physically removed by the bevel brush 83 .
- the contaminants peeled off from the outer peripheral edge of the substrate W are washed away by the cleaning liquid discharged onto the substrate W from the back rinse nozzle 29 and the mixed fluid cleaning liquid sprayed onto the substrate W from the spray nozzle 73 .
- the elevating support 54 is lifted so that the cleaning surface of the lower surface brush 51 comes into contact with the outer area of the lower surface of the substrate W.
- the lower surface brush 51 rotates (rotates) around the vertical axis.
- the gas jetting part 53 jets the gas toward the lower surface of the substrate W.
- the rotation speed of the lower surface brush 51 during cleaning of the lower surface outer region of the substrate W is set, for example, within a range of 5 rpm or more and 60 rpm or less.
- the rotating direction of the lower surface brush 51 may be opposite to the rotating direction of the suction holding portion 21 .
- the outer region of the lower surface of the substrate W can be efficiently cleaned.
- the rotating direction of the suction holding portion 21 is clockwise, and the rotating direction of the lower surface brush 51 is counterclockwise. If the lower surface brush 51 is not relatively large, the movement support portion 55 may move back and forth between the approach position and the separation position on the movable base 32, as indicated by a thick solid arrow a19 in FIG. . Even in this case, the lower surface brush 51 can clean the entire lower surface outer region of the substrate W that is rotated while being sucked and held by the suction holding unit 21 .
- the injection of the mixed fluid from the spray nozzle 73 to the substrate W is stopped.
- the spray nozzle 73 moves to a position on one side of the cup 61 (an initial position), as indicated by a thick solid arrow a20.
- the bevel brush 83 moves to the position on the other side of the cup 61 (the position in the initial state).
- the rotation of the lower surface brush 51 is stopped, and the lift support portion 54 is lowered so that the cleaning surface of the lower surface brush 51 is separated from the substrate W by a predetermined distance.
- the suction holding unit 21 rotates at high speed, so that the cleaning liquid adhering to the substrate W is shaken off, and the entire substrate W is dried.
- the cup 61 descends from the upper cup position to the lower cup position, as indicated by the thick solid arrow a22 in FIG.
- the lower chucks 11A and 11B are moved to a position where the new substrate W can be supported, as indicated by a thick solid-line arrow a23 in FIG. get closer to each other.
- the substrate W is carried out from within the unit housing 2 of the substrate cleaning apparatus 1 .
- the shutter 91 opens the loading/unloading port 2x immediately before the substrate W is unloaded.
- the hand (substrate holder) RH of the substrate transport robot enters the unit housing 2 through the loading/unloading port 2x.
- the hand RH receives the substrate W on the suction holding unit 21 and exits from the loading/unloading port 2x.
- the shutter 91 closes the loading/unloading port 2x.
- FIG. 17 is a diagram for explaining the main effects of the present invention obtained by a series of operations of the substrate cleaning apparatus 1 shown in FIGS. 4 to 16.
- FIG. In the substrate cleaning apparatus 1, first, the substrate W is held in a non-rotatable state by the upper holding devices 10A and 10B. Furthermore, the central region of the lower surface of the substrate W held by the upper holding devices 10A and 10B is cleaned. During this cleaning, a predetermined amount of cleaning liquid is supplied from the liquid nozzle 52 to the central region of the lower surface of the substrate W before the cleaning surface of the lower surface brush 51 is pressed against the central region of the lower surface of the substrate W, as shown in the upper part of FIG. be done.
- the lower surface brush 51 is positioned below the central region of the lower surface of the substrate W. As shown in FIG. Therefore, the cleaning liquid supplied to the central region of the lower surface of the substrate W falls from the lower surface of the substrate W onto the lower surface brush 51 . Thereby, the lower surface brush 51 and the lower surface central region of the substrate W are wetted.
- a lower surface brush 51 wetted with the cleaning liquid is pressed against the central area of the lower surface of the substrate W. Also, the lower surface brush 51 rotates around an axis extending in the vertical direction. Thereby, the central area of the lower surface of the substrate W is smoothly cleaned by the lower surface brush 51 .
- the substrate W is not rotated during the cleaning of the central area of the lower surface of the substrate W. Therefore, while the central region of the lower surface of the substrate W is being cleaned, the cleaning liquid hardly reaches the outer peripheral edge of the substrate W. As shown in FIG. That is, the cleaning liquid does not flow from the bottom surface of the substrate W to the top surface of the substrate W. FIG. Therefore, it is not necessary to supply the cleaning liquid to the upper surface of the substrate W in order to protect the peripheral edge of the upper surface of the substrate W. FIG. Therefore, the amount of cleaning liquid required for cleaning the lower surface of the substrate W can be reduced.
- the substrate W held by the upper holding devices 10A and 10B is transferred to the lower holding device 20.
- the lower holding device 20 holds and rotates the transferred substrate W.
- the area of the surface of the substrate W excluding the central area of the lower surface, that is, the upper surface, the outer peripheral edge, and the outer area of the lower surface of the substrate W are cleaned.
- a mixed fluid of cleaning liquid and gas is supplied from the spray nozzle 73 to the upper surface of the substrate W, and the spray nozzle 73 scans the upper surface of the substrate W, as shown in the lower part of FIG.
- the cleaning liquid is supplied to the lower surface outer region of the substrate W from two back rinse nozzles 29 . Further, the bevel brush 83 is pressed against the outer peripheral edge of the substrate W, and the lower surface brush 51 is pressed against the outer region of the lower surface of the substrate W. As shown in FIG.
- the cleaning liquid supplied to the lower surface outer region of the substrate W from the back rinse nozzle 29 prevents the cleaning liquid supplied to the upper surface of the substrate W from going around to the lower surface of the substrate W. Therefore, it is necessary to separately supply the cleaning liquid for cleaning the outer region of the lower surface of the substrate W and the back rinse to prevent the cleaning liquid supplied to the upper surface of the substrate W from flowing around to the lower surface of the substrate W. do not have. As a result, the amount of cleaning liquid required to clean the top surface and back surface of the substrate W can be reduced.
- the lower surface brush 51 is attached to a brush base, and is attached to the rotary shaft of the motor included in the lower surface brush rotation driving section 55a of FIG. 1 via the brush base.
- a joined body of the lower surface brush 51 and the brush base is called a brush unit.
- FIG. 18 is an external perspective view showing a preferred configuration example of the brush unit.
- the brush unit 300 is configured by mounting the lower surface brush 51 on the brush base 200 .
- the lower brush 51 may be made of a relatively soft resin material such as PVA or PTFE as described above.
- the brush base 200 may be made of relatively hard resin such as PVC (polyvinyl chloride) or PP (polypropylene).
- FIG. 19 is an external perspective view of the lower surface brush 51 of FIG. 18.
- FIG. 20 is a plan view of the lower brush 51 of FIG. 18.
- the lower brush 51 includes a base portion 110 and cleaning portions 120 and 130.
- the base portion 110 has a disk shape. In plan view, a geometric center 101 (FIG. 20) of base portion 110 is defined.
- the cleaning parts 120 and 130 are formed on the upper surface of the base part 110 so as to protrude upward from the upper surface of the base part 110 .
- the cleaning portion 120 is arranged to extend in the radial direction of the base portion 110 through the geometric center 101 of the base portion 110 .
- Cleaning section 130 is arranged along the outer edge of base section 110 .
- the cleaning portion 130 may contact both ends of the cleaning portion 120 .
- the amount of protrusion of the cleaning parts 120 and 130 from the upper surface of the base part 110 is, for example, 5 mm to 6 mm.
- the width of the cleaning portion 120 and the width of the cleaning portion 130 may be the same or different.
- a plurality of through holes 111 , a plurality of through holes 112 and a plurality of through holes 113 are formed in the base portion 110 .
- Each of the through holes 111-113 extends vertically.
- the through-holes 111 are used to connect the base portion 110 and the brush base 200 of FIG. 18, and ten through-holes 111 are provided in this example.
- the eight through-holes 111 are arranged in the peripheral region of the base portion 110 at approximately equal angular intervals.
- the two through holes 111 are arranged in the central region of the base portion 110 so as to face each other with the cleaning portion 120 interposed therebetween.
- the through-holes 112 are used to connect the brush base 200 and a motor or the like for rotating the brush unit 300, and four through-holes 112 are provided in this example.
- the four through-holes 112 are arranged in the central region of the base portion 110 at approximately equal angular intervals so as to surround the geometric center 101 of the base portion 110 .
- the through-holes 113 are used to discharge cleaning liquid during substrate cleaning, and ten through-holes 113 are provided in this example.
- the ten through-holes 113 are regularly arranged in the peripheral area of the base portion 110 along the cleaning portion 130 .
- the brush base 200 is a plate-like member having the same outer shape as the base portion 110 of the lower brush 100 .
- 21 is a longitudinal sectional view of the brush unit 300 of FIG. 18.
- FIG. 21 a recess 210 is formed in the central region of the bottom surface of the brush base 200 .
- a sloped portion 220 is formed in the peripheral region of the lower surface of the brush base 200 so as to slope downwards toward the outside.
- a plurality of screw holes 201 , a plurality of through holes 202 and a plurality of through holes 203 are formed in the brush base 200 .
- a plurality of screw holes 201 are provided on the upper surface of the brush base 200 so as to correspond to the plurality of through holes 111 of the lower surface brush 100 respectively.
- the plurality of through holes 202 extend vertically and are arranged to correspond to the plurality of through holes 112 of the lower surface brush 100 respectively.
- the plurality of through holes 203 are arranged to extend vertically and correspond to the plurality of through holes 113 of the lower surface brush 100 respectively.
- a plurality of screw members 310 (FIG. 18) are respectively inserted through the plurality of through holes 111 of the lower surface brush 100 from above.
- the lower end of each threaded member 310 is attached to the corresponding threaded hole 201 of the brush base 200 .
- the lower surface brush 100 and the brush base 200 are connected, and the brush unit 300 is completed.
- multiple through holes 113 of lower surface brush 100 communicate with multiple through holes 203 of brush base 200 .
- the brush unit 300 is attached to the rotation shaft 400 of the motor of the lower surface brush rotation drive section 55a.
- the upper end of the rotating shaft 400 is fitted into the concave portion 210 of the brush base 200 from below.
- a plurality of screw holes 401 corresponding to the through holes 202 of the brush base 200 are formed in the rotating shaft 400 .
- a plurality of threaded members 320 (FIG. 18) are respectively inserted through the plurality of through holes 112 of the lower surface brush 100 from above.
- the lower end of each threaded member 320 is attached to the corresponding threaded hole 401 of the rotating shaft 400 through the corresponding through hole 202 of the brush base 200 .
- the brush unit 300 of FIG. 18 for example, when the cleaning liquid is supplied onto the lower surface brush 51, part of the cleaning liquid is temporarily stored in the area inside the cleaning section 130. As shown in FIG. The stored cleaning liquid is gently discharged downward through the plurality of through holes. Therefore, according to the brush unit 300 described above, a predetermined amount of cleaning liquid can be stored in the area inside the cleaning part 130 of the lower surface brush 51 immediately before the cleaning of the central area of the lower surface of the substrate W is started. As a result, even when cleaning the central region of the lower surface of the substrate W to which the cleaning liquid is not supplied to the lower surface of the substrate W, the cleaning liquid stored in the cleaning part 130 of the lower surface brush 51 smoothly removes contaminants adhering to the central region of the lower surface of the substrate W. removed.
- the cleaning section 120 is arranged so as to pass through the geometric center 101 of the base section 110 and extend in the radial direction of the base section 110 .
- the contact area of the lower surface brush 51 with respect to the substrate W is increased compared to the configuration in which only the cleaning section 130 is formed on the base section 110 .
- a higher cleaning power can be obtained for the lower surface of the substrate W.
- the lower surface brush 51 may have a configuration that does not include the cleaning section 120 out of the cleaning sections 120 and 130 in FIG. In this case as well, when cleaning the central area of the lower surface of the substrate W, the central area of the lower surface of the substrate W is smoothly cleaned by the cleaning liquid stored in the cleaning part 130 of the lower surface brush 51 even if the cleaning liquid is not supplied. .
- the lower surface brush 51 is pressed against the lower surface of the substrate W when the lower surface central region and the lower surface outer region of the substrate W are cleaned by the lower surface brush 51. rotates about a vertical axis, but the invention is not so limited.
- the lower surface brush 51 cleans the lower surface central region and the lower surface outer region of the substrate W by moving or reciprocating on the lower surface of the substrate W linearly or in an arc instead of rotating around the vertical axis.
- the two liquid nozzles 52 of the lower surface cleaning apparatus 50 eject the cleaning liquid upwards from the lower surface brush 51, but the present invention is not limited to this.
- the liquid nozzle 52 may be configured to be able to directly discharge the cleaning liquid toward the cleaning surface of the lower brush 51 .
- the cleaning liquid is supplied from the liquid nozzles 52 to the lower brush 51 in advance before the lower brush 51 moves below the substrate W.
- FIG. As a result, the central area of the lower surface of the substrate W is cleaned by the wet lower surface brush 51 .
- the lower surface brush 51 can be cleaned by discharging the cleaning liquid to the lower surface brush 51 while the lower surface of the substrate W is not being cleaned. Further, by discharging the cleaning liquid to the lower surface brush 51 while the lower surface of the substrate W is not being washed, the lower surface brush 51 can be prevented from drying.
- the cleaning liquid used for cleaning the substrate W includes, in addition to a rinse liquid such as pure water (DIW), ammonia hydrogen peroxide (SC1), hydrochloric acid hydrogen peroxide (SC2), sulfuric acid hydrogen peroxide (SPM), sulfuric acid water or A chemical solution such as hydrofluoric acid may be used.
- DIW pure water
- SC1 ammonia hydrogen peroxide
- SC2 hydrochloric acid hydrogen peroxide
- SPM sulfuric acid hydrogen peroxide
- a chemical solution such as hydrofluoric acid
- the cleaning liquid ejected from the back rinse nozzle 29, the cleaning liquid ejected from the liquid nozzle 52, and the cleaning liquid contained in the mixed fluid ejected from the spray nozzle 73 may be of the same type or may be of different types. may be a cleaning liquid.
- those cleaning liquids may contain a rinse liquid, may contain a chemical liquid, or may contain a rinse liquid and a chemical liquid.
- the outer region of the lower surface of the substrate W is cleaned in the lower holding device 20.
- Embodiments are not limited to this.
- the central region of the lower surface of the substrate W may be cleaned in the upper holding devices 10A and 10B.
- the spray nozzle 73 cleans the upper surface of the substrate W by scanning from the center of the substrate W toward the outer peripheral edge in plan view, but the embodiment is limited to this. not.
- the spray nozzle 73 may clean the upper surface of the substrate W by scanning from the outer peripheral edge of the substrate W toward the center of the substrate W in plan view.
- the upper surface of the substrate W is cleaned using the spray nozzle 73 that injects the mixed fluid, but the embodiment is not limited to this.
- the upper surface of the substrate W may be cleaned using a brush, or may be cleaned using a cleaning liquid nozzle that ejects cleaning liquid.
- the substrate cleaning apparatus 1 includes the control unit 9, but the embodiment is not limited to this. If the substrate cleaning apparatus 1 is configured to be controllable by an external information processing device, the substrate cleaning apparatus 1 may not include the control section 9 .
- the substrate W is an example of the substrate
- the substrate cleaning device 1 is an example of the substrate cleaning device
- the upper holding devices 10A and 10B are examples of the first substrate holding section
- the lower surface brush 51 are examples of the cleaning brush and the lower brush
- the lower brush rotation drive section 55a, the lower brush elevation drive section 55b, and the lower brush movement drive section 55c are examples of the brush drive section
- the control section 9 is an example of the control section.
- the liquid nozzle 52 and the lower surface cleaning liquid supply unit 56 are examples of a first lower surface liquid supply unit
- the suction holding unit 21 of the lower holding device 20 is an example of a second substrate holding unit
- the spray nozzle 73 and The upper surface cleaning fluid supply section 75 is an example of an upper surface liquid supply section
- the back rinse liquid supply section 28 and the back rinse nozzle 29 are examples of a second lower surface liquid supply section.
- the upper surface of the brush base 200 is an example of a flat surface
- the brush base 200 is an example of a base portion
- the cleaning section 130 is an example of a first cleaning section
- the geometric center 101 is an example of a geometric center.
- the cleaning unit 120 is an example of the second cleaning unit.
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Abstract
Description
図1は、本発明の一実施の形態に係る基板洗浄装置の模式的平面図である。図2は、図1の基板洗浄装置1の内部構成を示す外観斜視図である。本実施の形態に係る基板洗浄装置1においては、位置関係を明確にするために互いに直交するX方向、Y方向およびZ方向を定義する。図1および図2以降の所定の図では、X方向、Y方向およびZ方向が適宜矢印で示される。X方向およびY方向は水平面内で互いに直交し、Z方向は鉛直方向に相当する。
図4~図16は、図1の基板洗浄装置1の概略動作を説明するための模式図である。図4~図16の各々においては、上段に基板洗浄装置1の平面図が示される。また、中段にY方向に沿って見た下側保持装置20およびその周辺部の側面図が示され、下段にX方向に沿って見た下側保持装置20およびその周辺部の側面図が示される。中段の側面図は図1のA-A線側面図に対応し、下段の側面図は図1のB-B線側面図に対応する。なお、基板洗浄装置1における各構成要素の形状および動作状態の理解を容易にするために、上段の平面図と中段および下段の側面図との間では、一部の構成要素の拡縮率が異なる。また、図4~図16では、カップ61が二点鎖線で示されるとともに、基板Wの外形が太い一点鎖線で示される。
図17は、図4~図16に示される基板洗浄装置1の一連の動作により得られる本発明の主たる効果を説明するための図である。基板洗浄装置1においては、最初に、上側保持装置10A,10Bにより回転不可能な状態で基板Wが保持される。さらに、上側保持装置10A,10Bにより保持された基板Wの下面中央領域が洗浄される。この洗浄時には、図17の上段に示すように、下面ブラシ51の洗浄面が基板Wの下面中央領域に押し当てられる前に、液ノズル52から基板Wの下面中央領域に所定量の洗浄液が供給される。このとき、下面ブラシ51は、基板Wの下面中央領域の下方に位置する。そのため、基板Wの下面中央領域に供給された洗浄液は、基板Wの下面から下面ブラシ51上に落下する。それにより、下面ブラシ51および基板Wの下面中央領域が湿潤する。
下面ブラシ51は、ブラシベースに取り付けられた上で、ブラシベースを介して図1の下面ブラシ回転駆動部55aが含むモータの回転軸に取り付けられる。以下の説明では、下面ブラシ51とブラシベースとの接合体をブラシユニットと呼ぶ。
(1)上記実施の形態に係る基板洗浄装置1においては、下面ブラシ51による基板Wの下面中央領域および下面外側領域の洗浄時に、基板Wの下面に押圧された下面ブラシ51が上下方向の軸の周りで回転するが、本発明はこれに限定されない。下面ブラシ51は、上下方向の軸の周りで回転する代わりに、基板Wの下面上を直線状または円弧状に移動または往復移動することにより、基板Wの下面中央領域および下面外側領域を洗浄してもよい。
以下、請求項の各構成要素と実施の形態の各要素との対応の例について説明するが、本発明は下記の例に限定されない。請求項の各構成要素として、請求項に記載されている構成または機能を有する他の種々の要素を用いることもできる。
Claims (10)
- 洗浄液を用いて基板の上面および下面を洗浄する基板洗浄装置であって、
基板の外周端部の複数の部分に当接することにより、基板を回転させることなく水平姿勢で保持する第1の基板保持部と、
基板の前記下面に接触可能に構成された洗浄ブラシと、
前記第1の基板保持部により保持された基板の前記下面に前記洗浄ブラシを押し当てるとともに、前記第1の基板保持部により保持された基板に対して前記洗浄ブラシを相対的に移動させることが可能に構成されたブラシ駆動部と、
制御部とを備え、
前記制御部は、基板に洗浄液が供給されない状態で、洗浄液により湿潤した前記洗浄ブラシが基板の下面中央領域に押し当てられつつ前記洗浄ブラシが基板の前記下面中央領域上を移動するように、前記第1の基板保持部および前記ブラシ駆動部を制御する、基板洗浄装置。 - 前記第1の基板保持部により保持される基板の前記下面中央領域に洗浄液を供給する第1の下面液供給部をさらに備え、
前記制御部は、基板の前記下面中央領域に前記洗浄ブラシが押し当てられる前に、前記第1の基板保持部により保持される基板の前記下面中央領域の下方に前記洗浄ブラシが位置する状態で前記下面中央領域に洗浄液が供給されるように、前記ブラシ駆動部および前記第1の下面液供給部を制御する、請求項1記載の基板洗浄装置。 - 基板の前記下面中央領域を吸着することにより基板を水平姿勢で保持しつつ上下方向に延びる軸の周りで回転させる第2の基板保持部と、
前記第2の基板保持部により保持された基板の前記上面に洗浄液を供給する上面液供給部と、
前記第2の基板保持部により保持された基板の前記下面中央領域を取り囲む下面外側領域に洗浄液を供給する第2の下面液供給部とをさらに備え、
前記ブラシ駆動部は、前記第2の基板保持部により保持された基板の前記下面外側領域に前記洗浄ブラシをさらに押し当てることが可能に構成され、
前記制御部は、前記第2の基板保持部により回転する基板の前記上面に洗浄液が供給されるとともに当該基板の前記下面外側領域に洗浄液が供給されつつ、前記洗浄ブラシが基板の前記下面外側領域に押し当てられるように、前記第2の基板保持部、前記上面液供給部、前記第2の下面液供給部および前記ブラシ駆動部を制御する、請求項1または2記載の基板洗浄装置。 - 前記洗浄ブラシは、基板の前記下面の洗浄に用いられる下面ブラシであり、
前記下面ブラシは、
上方を向く平坦面を有する土台部と、
前記土台部の前記平坦面から上方に突出しかつ前記土台部の外縁に沿うように前記土台部の前記平坦面に設けられる第1の洗浄部と含む、請求項1~3のいずれか一項に記載の基板洗浄装置。 - 前記下面ブラシは、
前記土台部の前記平坦面から上方に突出しかつ平面視における前記土台部の幾何学的中心を通って一方向に延びるよう前記土台部の前記平坦面に設けられる第2の洗浄部をさらに含む、請求項4記載の基板洗浄装置。 - 洗浄液を用いて基板の上面および下面を洗浄する基板洗浄方法であって、
基板の外周端部の複数の部分に当接する第1の基板保持部を用いて基板を回転させることなく水平姿勢で保持するステップと、
基板の前記下面に接触可能に構成された洗浄ブラシを、前記第1の基板保持部により保持された基板の前記下面に押し当てるとともに、前記第1の基板保持部により保持された基板に対して前記洗浄ブラシを相対的に移動させるステップとを含み、
前記洗浄ブラシを基板の前記下面に押し当てるとともに基板に相対的に移動させるステップは、基板に洗浄液が供給されない状態で、洗浄液により湿潤した前記洗浄ブラシを、基板の下面中央領域に押し当てつつ基板の前記下面中央領域上で移動させることを含む、基板洗浄方法。 - 基板の前記下面中央領域に前記洗浄ブラシが押し当てられる前に、前記第1の基板保持部により保持される基板の前記下面中央領域の下方に前記洗浄ブラシが位置する状態で、前記下面中央領域に洗浄液を供給するステップをさらに含む、請求項6記載の基板洗浄方法。
- 基板の前記下面中央領域を吸着する第2の基板保持部を用いて基板を水平姿勢で保持しつつ上下方向に延びる軸の周りで回転させるステップと、
前記第2の基板保持部により保持されて回転する基板の前記上面に洗浄液を供給するステップと、
前記基板の前記上面に洗浄液が供給された状態で、前記第2の基板保持部により保持されて回転する基板の前記下面中央領域を取り囲む下面外側領域に洗浄液を供給するステップとをさらに備え、
前記洗浄ブラシを基板の前記下面に押し当てるとともに基板に相対的に移動させるステップは、前記第2の基板保持部により回転する基板の前記上面に洗浄液が供給されるとともに当該基板の前記下面外側領域に洗浄液が供給された状態で、前記洗浄ブラシを基板の前記下面外側領域に押し当てつつ基板の前記下面外側領域上で移動させることを含む、請求項6または7記載の基板洗浄方法。 - 前記洗浄ブラシは、基板の前記下面の洗浄に用いられる下面ブラシであり、
前記下面ブラシは、
上方を向く平坦面を有する土台部と、
前記土台部の前記平坦面から上方に突出しかつ前記土台部の外縁に沿うように前記土台部の前記平坦面に設けられる第1の洗浄部とを含む、請求項6~8のいずれか一項に記載の基板洗浄方法。 - 前記下面ブラシは、
前記土台部の前記平坦面から上方に突出しかつ平面視における前記土台部の幾何学的中心を通って一方向に延びるよう前記土台部の前記平坦面に設けられる第2の洗浄部をさらに含む、請求項9記載の基板洗浄方法。
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