WO2005098919A1 - 基板洗浄装置、基板洗浄方法及びその方法に使用するプログラムを記録した媒体 - Google Patents
基板洗浄装置、基板洗浄方法及びその方法に使用するプログラムを記録した媒体 Download PDFInfo
- Publication number
- WO2005098919A1 WO2005098919A1 PCT/JP2005/006675 JP2005006675W WO2005098919A1 WO 2005098919 A1 WO2005098919 A1 WO 2005098919A1 JP 2005006675 W JP2005006675 W JP 2005006675W WO 2005098919 A1 WO2005098919 A1 WO 2005098919A1
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- WIPO (PCT)
- Prior art keywords
- substrate
- brush
- fluid nozzle
- cleaning
- cleaning position
- Prior art date
Links
- 238000004140 cleaning Methods 0.000 title claims abstract description 298
- 238000000034 method Methods 0.000 title claims abstract description 50
- 239000012530 fluid Substances 0.000 claims abstract description 196
- 239000000758 substrate Substances 0.000 claims description 183
- 230000002093 peripheral effect Effects 0.000 claims description 42
- 230000007423 decrease Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 abstract description 38
- 239000000356 contaminant Substances 0.000 abstract description 12
- 238000003672 processing method Methods 0.000 abstract 1
- 235000012431 wafers Nutrition 0.000 description 162
- 230000007246 mechanism Effects 0.000 description 23
- 239000002245 particle Substances 0.000 description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 9
- 230000003028 elevating effect Effects 0.000 description 8
- 239000007789 gas Substances 0.000 description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 239000004065 semiconductor Substances 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 5
- 238000012546 transfer Methods 0.000 description 5
- 229910001873 dinitrogen Inorganic materials 0.000 description 4
- 238000001312 dry etching Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005530 etching Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000005507 spraying Methods 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 210000000050 mohair Anatomy 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005201 scrubbing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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
- H01L21/02—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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/30—Cleaning by methods involving the use of tools by movement of cleaning members over a surface
- B08B1/32—Cleaning by methods involving the use of tools by movement of cleaning members over a surface using rotary cleaning members
-
- 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
Definitions
- the present invention relates to a substrate cleaning apparatus and a substrate cleaning method used for cleaning processing for removing contaminants adhering to, for example, a semiconductor substrate, and a medium recording a program used for the method.
- a semiconductor wafer (hereinafter, referred to as a "wafer") is washed with a cleaning solution such as a chemical solution or pure water, and contamination of particles, organic contaminants, and metal impurities adhered to the wafer.
- a cleaning process is performed to remove the chillon!
- a method of scrub-cleaning a wafer by bringing a brush into contact with the wafer is known (see, for example, JP-A-2003-332287). Scrub cleaning with a brush is particularly performed when cleaning the back surface of a wafer on which devices are not formed.
- a method is known in which a cleaning liquid is formed into droplets by using a two-fluid nozzle and sprayed onto a wafer to perform cleaning (see, for example, JP-A-2003-197597).
- An object of the present invention is to provide a substrate cleaning apparatus, a substrate cleaning method, and a medium on which a program used for the method is recorded, which can prevent the transfer of brush force dirt to transfer the dirt on the wafer.
- an apparatus for cleaning a substrate comprising: A spin chuck that rotates the plate, a brush that contacts the substrate to clean the substrate, and a two-fluid nozzle that sprays droplets.
- the cleaning position by the brush and the cleaning position by the two-fluid nozzle are as follows.
- the configuration is such that the substrate moves toward the peripheral portion from the central portion of the substrate and moves relative to the substrate, and that the cleaning position by the two-fluid nozzle is moved from the central portion of the substrate toward the peripheral portion.
- a substrate cleaning apparatus wherein the cleaning position by the two-fluid nozzle is always arranged on the center side of the substrate than the cleaning position by the brush. According to the Kagaru substrate cleaning device, droplets are ejected to the surface after the brush comes into contact, so that even if dirt is transferred from the brush to the wafer, the transferred dirt can be removed.
- the brush support arm for supporting the brush the two-fluid nozzle support arm for supporting the two-fluid nozzle, and the movement of the brush support arm and the two-fluid nozzle support arm. It is also possible to provide a control unit for controlling. It is preferable that the control unit controls the moving speed of the two-fluid nozzle supporting arm to be faster than the moving speed of the brush supporting arm. Further, it is preferable that the control unit moves the two-fluid nozzle support arm in a direction opposite to a moving direction of the brush support arm.
- control unit may move the cleaning position by the two-fluid nozzle to a portion that comes into contact with the brush immediately before the brush separates from the substrate after separating the brush from the substrate at the peripheral edge of the substrate. , It is preferable to control.
- a support arm for supporting and moving the brush and the two-fluid nozzle is provided, and a control unit for controlling the movement of the support arm is provided.
- the two-fluid nozzle may be arranged behind the brush, and a second two-fluid nozzle may be arranged behind the brush in the direction of rotation of the substrate.
- the control unit may contact the center of the substrate with a brush while ejecting droplets to the substrate of the two-fluid nozzle cap, and move the cleaning position by the brush to the center of the substrate.
- the cleaning position by the two-fluid nozzle is moved to the center of the substrate, and then the cleaning position by the two-fluid nozzle is moved relative to the substrate from the central portion of the substrate to the periphery. Good to control, too.
- control unit uses the brush as it moves from the center of the substrate to the periphery. It is preferable to control the moving speed of the cleaning position with respect to the substrate and the moving speed of the cleaning position with respect to the substrate by the two-fluid nozzle to be slow.
- a method of cleaning a substrate wherein the brush is brought into contact with the substrate while rotating the substrate, and the cleaning position by the brush is directed from the central portion of the substrate to the peripheral portion.
- the nozzle is moved relatively to the substrate, droplets are ejected from the two-fluid nozzle onto the substrate, and the cleaning position of the two-fluid nozzle is moved relative to the substrate with the force at the center of the substrate also directed toward the periphery. While the cleaning position by the two-fluid nozzle is moved toward the peripheral portion also at the center of the substrate, the cleaning position by the two-fluid nozzle is always arranged on the center side of the substrate from the cleaning position by the brush.
- a method for cleaning a substrate is provided.
- a brush is brought into contact with the center of the substrate while spraying droplets onto the substrate with the two-fluid nozzle cap, and the cleaning position by the brush is shifted from the center of the substrate.
- the cleaning position by the two-fluid nozzle is moved to the center of the substrate, and then the cleaning position by the two-fluid nozzle is moved relative to the substrate with the force at the center of the substrate also directed toward the peripheral edge. Also good,.
- the cleaning position by the two-fluid nozzle is moved to a portion where the brush is in contact immediately before the substrate force is separated.
- the cleaning position by the two-fluid nozzle may be moved in a direction opposite to the moving direction of the cleaning position by the brush.
- the moving speed of the cleaning position by the brush with respect to the substrate and the moving speed of the cleaning position by the two-fluid nozzle with respect to the substrate are reduced in accordance with the force at the central portion of the substrate and the peripheral portion.
- the moving speed of the cleaning position with respect to the substrate by the two-fluid nozzle is higher than the moving speed of the cleaning position with respect to the substrate by the brush.
- the brush is brought into contact with the substrate while rotating the substrate, and the cleaning position by the brush is moved relatively to the substrate with the force at the center of the substrate also directed toward the peripheral edge.
- the body nozzle force sprays droplets onto the substrate, moves the cleaning position by the two-fluid nozzle relative to the substrate toward the center of the substrate, and moves the cleaning position by the two-fluid nozzle onto the substrate.
- Cleaning by the two-fluid nozzle while moving the central force toward the periphery A program for causing a computer to execute a procedure for always arranging the position on the center side of the substrate from the cleaning position by the brush, and a medium on which the program is recorded are provided.
- the program may be configured such that the brush is brought into contact with the center of the substrate while ejecting droplets onto the substrate, and the cleaning position by the brush is moved from the center of the substrate.
- the computer moves the cleaning position by the fluid nozzle to the center of the substrate, and then moves the cleaning position by the two-fluid nozzle to the peripheral portion of the substrate from the central portion of the substrate to the computer. You may make it execute.
- the program moves the cleaning position by the two-fluid nozzle to a portion where the brush comes into contact immediately before the brush separates from the substrate after the brush also separates the substrate force at the periphery of the substrate. You can make the computer perform the steps to make it work.
- the program may cause a computer to execute a procedure of moving the cleaning position by the two-fluid nozzle in a direction opposite to a moving direction of the cleaning position by the brush.
- the moving speed of the cleaning position with respect to the substrate by the brush and the moving speed of the cleaning position with respect to the substrate by the two-fluid nozzle are slowed down as the force of the central portion of the substrate moves toward the peripheral portion.
- the computer may be caused to execute a procedure for achieving the same.
- the program may cause a computer to execute a procedure of making the moving speed of the cleaning position of the two-fluid nozzle relative to the substrate faster than the moving speed of the cleaning position of the brush relative to the substrate.
- the brush and the two-fluid nozzle are provided, and the droplet is ejected by the two-fluid nozzle toward the center of the cleaning position of the brush on the substrate. Can be washed by a jet. Therefore, even if the dirt is transferred to the wafer with the brush force, the transferred dirt can be removed.
- FIG. 1 is a side view showing a basic configuration of an embodiment of a substrate cleaning apparatus according to the present invention.
- FIG. 2 is a plan view showing a basic configuration of the substrate cleaning apparatus according to the present embodiment.
- FIG. 3 is a vertical sectional view of a two-fluid nozzle.
- FIG. 4 is an explanatory diagram for explaining movement of a cleaning position by a brush and a cleaning position by a two-fluid nozzle.
- FIG. 5 is an explanatory diagram illustrating an embodiment in which droplets of a two-fluid nozzle are ejected when a brush is brought into contact with the center of a wafer.
- FIG. 6 is an explanatory diagram showing movements of the two-fluid nozzle and the brush after the state of FIG.
- FIG. 7 is a plan view showing a basic configuration of another embodiment of the present invention.
- FIG. 8 is a graph showing the relationship between the number of washed wafers and the particle removal rate in Example and Comparative Example 2.
- a substrate cleaning apparatus 1 for cleaning a back surface (a surface on which a semiconductor device is not formed) of a wafer W as a substrate.
- a substrate cleaning apparatus 1 includes a spin chuck 2 that holds a substantially disk-shaped wafer W substantially horizontally, and a spin chuck 2 that contacts the upper surface (rear surface) of the wafer W. It has a brush 3 for cleaning the wafer W, and a two-fluid nozzle 5 for ejecting droplets formed by mixing a cleaning liquid and a gas onto the upper surface of the wafer W.
- a supply nozzle 7 for supplying a cleaning liquid such as pure water to the upper surface of the Ueno and W is provided.
- the spin chuck 2, the brush 3, the two-fluid nozzle 5, and the supply nozzle 7 are housed in a closed chamber 18.
- an inner cup 10 and an outer cup 11 surrounding the wafer W held by the spin chuck 2 are provided in the chamber 18.
- the inner cup 10 can be moved up and down inside the outer cup 11.
- the inner cup 10 is raised to surround the periphery of the wafer W by the inner cup 10, and the inner cup 10 is lowered to surround the wafer W by the outer cup 11.
- the chamber 18 is provided with an opening 20 for carrying the wafer W in and out, and a shirt 21 for opening and closing the opening 20.
- control of each unit of the substrate cleaning apparatus 1 is performed by an instruction of a control unit 15 including a control computer 90 having a recording medium 91 on which a control software is recorded.
- the recording medium 91 is fixedly provided in the control computer 90. Or a device that is detachably attached to a reading device provided in the control computer 90 and can be read by the reading device.
- the recording medium 91 is a node disk drive in which the control software is installed by a serviceman of a substrate cleaning apparatus manufacturer. In other embodiments,
- the recording medium 91 is a removable disk such as a CD-ROM or a DVD-ROM on which control software is written, and such a removable disk is read by an optical reading device provided in the control computer 90.
- the recording medium 91 may be either a RAM (random access memory) or a ROM (read only memory), and the recording medium 91 may be a cassette type ROM or a memory card. There may be. In short, any known in the technical field of computer can be used as the recording medium 91.
- control software may be stored in a management computer that controls the control computer 90 of each substrate cleaning apparatus. In this case, each substrate cleaning apparatus is operated by a management computer via a communication line to execute a predetermined substrate cleaning process.
- the spin chuck 2 has three holding members 25 on the upper part. These holding members 25 are brought into contact with the three peripheral edges of the wafer W, respectively, and are held by the three holding members 25 so as to surround the peripheral edge of the wafer W. As shown in Fig. 1, the lower part of the spin chuck 2 is a motor 2 that rotates the spin chuck 2 about a vertical rotation center axis.
- the spin chuck 2 is rotated, and the wafer W is integrated with the spin chuck 2 in a substantially horizontal plane with the center P of the wafer W as the rotation center.
- the drive of the motor 26 is controlled by the control unit 15.
- a brush support arm 40 supporting the brush 3 is provided above the wafer W supported by the spin chuck 2, a brush support arm 40 supporting the brush 3 is provided.
- the brush 3 is attached to a lower end of a lifting / lowering rotating shaft 42 protruding below a lifting / lowering rotating mechanism 41 fixed to a lower surface of a leading end of a brush supporting arm 40.
- the elevating rotary shaft 42 is vertically movable and rotatable by an elevating rotary mechanism 41, so that the brush 3 can be raised and lowered to an arbitrary height and rotated. It has become.
- the lifting / lowering rotation mechanism 41 can press the brush 3 against the upper surface of the wafer W supported on the spin chuck 2 with an arbitrary contact pressure by appropriately applying a thrust to the lifting / lowering rotation shaft 42 in the vertical direction. It is.
- the drive of the lifting / lowering rotation mechanism 41 is controlled by the control unit 15.
- the brush 3 includes a cylindrical brush body 43.
- the brush body 43 may include, for example, a substantially cylindrical sponge having a strong grease or the like, a hard brush made of a hard bristle or a nylon brush, or a soft brush having a mohair brush having a soft bristle. It is used appropriately according to the type.
- a two-fluid nozzle support arm 50 that supports the two-fluid nozzle 5 is provided above the wafer W supported by the spin chuck 2.
- the two-fluid nozzle 5 is attached to the lower end of an elevating shaft 52 projecting below an elevating mechanism 51 fixed to the lower surface of the tip of the two-fluid nozzle support arm 50.
- the elevating shaft 52 can be moved up and down by an elevating mechanism 51, whereby the two-fluid nozzle 5 can be raised and lowered to an arbitrary height.
- the drive of the elevating mechanism 51 is controlled by the control unit 15.
- the two-fluid nozzle 5 is provided inside the two-fluid nozzle 5 with, for example, nitrogen (N) or the like.
- the nitrogen gas supplied from the gas supply path 53 and the pure water supplied from the liquid supply path 54 are mixed inside the two-fluid nozzle 5. Then, as a result of mixing the pure water and the nitrogen gas, the pure water becomes innumerable fine droplets, and passes through the outlet path 55 while being accelerated by the nitrogen gas.
- the outlet path 55 is arranged substantially vertically, and the lower end force of the outlet path 55 also ejects the liquid droplet downward.
- Opening / closing valves 56 and 57 are interposed in the gas supply path 53 and the liquid supply path 54, respectively. The opening and closing operations of the on-off valves 56 and 57 are controlled by the control unit 15 shown in Fig. 1, respectively.
- the base end of the brush support arm 40 and the base end of the two-fluid nozzle support arm 50 are arranged substantially horizontally on the opposite side of the opening 20 with the outer cup 11 interposed therebetween. They are movably supported along rails 60 and 61, respectively. With brush support arm 40 Each of the two-fluid nozzle support arms 50 can move in parallel across the upper side of the outer cup 11.
- a drive mechanism 62 for moving the brush support arm 40 along the guide rail 60 and a drive mechanism 63 for moving the two-fluid nozzle support arm 50 along the guide rail 61 are provided.
- the driving of the driving mechanisms 62 and 63 is controlled by the control unit 15.
- the brush support arm 40 is moved between the upper part of the wafer W and the right side of the outer cup 11 (the right side in FIG.
- the two-fluid nozzle support arm 50 moves between the upper side of the wafer W and the left side of the outer cup 11 (the left side as viewed from the opening 20 side in FIG. 2).
- the moving speed and position of the brush support arm 40 and the moving speed and position of the two-fluid nozzle support arm 50 can be appropriately changed by controlling the driving mechanism 62 and the driving mechanism 63, respectively. !
- both the brush 3 and the two-fluid nozzle 5 force move from the center of the wafer W supported by the spin chuck 2 to the periphery. It is configured so as to be able to move relatively to the wafer W toward it.
- the brush 3 moves between the upper part of the center of the wafer W and the right side of the outer cup 11, and the two-fluid nozzle 5 moves between the upper part of the center of the wafer W and the left side of the outer cup 11.
- the moving speed of each of the brush supporting arm 40 and the two-fluid nozzle supporting arm 50 can be appropriately changed.
- the radius of the center P force is the distance from the brush 3 to the cleaning position Sb.
- the area Ab can be enlarged while scrubbing the substantially circular area Ab uniformly.
- the two-fluid nozzle 5 also moves the center P force of the wafer W to the left while ejecting droplets from the two-fluid nozzle 5. That is, droplets are ejected
- the cleaning position Sn by the two-fluid nozzle 5 is moved to the left side from the center P of the rotating wafer W.
- the center P force is also moved by the two-fluid nozzle 5 by moving it toward the periphery.
- the area An can be enlarged while uniformly ejecting droplets to the substantially circular area An whose radius is the distance to Sn.
- the two-fluid nozzle 5 is moved from the center P to the periphery.
- the cleaning position Sn by the two-fluid nozzle 5 is always located closer to the center P of the wafer W than the cleaning position Sb by the brush 3. In this way, brush 3 comes into contact
- the droplets can be ejected to the area Ab after the cleaning to clean the area Ab. Therefore, brush 3
- the transferred dirt can be removed by droplets ejected from the two-fluid nozzle 5, so that the contaminants can be reliably removed from the wafer W.
- the droplets flowing from the cleaning position Sn by the two-fluid nozzle 5 toward the periphery of the wafer W are supplied to the brush 3, so that the contaminants attached to the brush 3 can be washed away by the droplets.
- the two-fluid nozzle support arm 50, the two-fluid nozzle 5 and the cleaning position Sn are moved to the left, which is the opposite direction to the moving direction of the brush support arm 40, the brush 3, and the cleaning position Sb. Then, collision between the brush support arm 40 and the two-fluid nozzle support arm 50 can be prevented.
- cleaning by the brush 3 is performed at a position closer to the center P than the peripheral edge of the wafer W.
- the speed at which the lash 3 moves to the right decreases from the center of the wafer W toward the periphery. By doing so, the contaminant removal performance of the brush 3 can be improved. Also, the moving speed of the cleaning position Sn by the two-fluid nozzle 5, that is, the speed at which the two-fluid nozzle 5 moves to the left with respect to the center P of W
- the distance from the portion to the peripheral portion be slower.
- the contaminant removal performance of the two-fluid nozzle 5 can be improved.
- the two-fluid nozzle 5 is moved faster than the brush 3, so that the moving speed of the cleaning position Sn by the two-fluid nozzle 5 is faster than the moving speed of the cleaning position Sb by the brush 3. preferable. As a result, the throughput of cleaning the wafer W by the brush 3 and the two-fluid nozzle 5 can be improved.
- cleaning by the two-fluid nozzle 5 is performed by moving the brush 3 to the right at the center P, moving the two-fluid nozzle 5 above the center P, and ejecting droplets at ooo at the center P.
- the brush 3 comes into contact immediately before the separation, and the cleaning position Sn by the two-fluid nozzle 5 is moved to the portion where the brush 3 is separated, thereby cleaning the peripheral portion.
- the cleaning with the two-fluid nozzle 5 starts and ends later than the cleaning with the brush 3, but by moving the cleaning position Sn with the two-fluid nozzle 5 faster than the cleaning position Sb with the brush 3, the cleaning with the brush 3 is performed.
- the difference between the cleaning end time and the cleaning end time by the two-fluid nozzle 5 can be reduced. Therefore, the time required for cleaning the wafer W can be reduced, and the throughput of the cleaning process is improved.
- the supply nozzle 7 shown in FIG. 1 is movable between the outside of the outer cup 11 and the upper side of the wafer W held by the spin chuck 2 by driving a drive mechanism (not shown). Further, the supply nozzle 7 is connected to a cleaning liquid supply path 70 for supplying the cleaning liquid. An on-off valve 71 is provided in the cleaning liquid supply path 70.
- the drive of the drive mechanism (not shown), the opening / closing operation of the opening / closing valve 71, and the like are controlled by control commands of the control unit 15, respectively.
- control unit 15 including the control computer 90 having the recording medium 91 storing the control software, as shown in FIGS.
- a wafer W that has not yet been cleaned by a transfer arm (not shown) is carried into the chamber 18, and the wafer W is transferred to the spin chuck 2 as shown in FIG.
- Ueno and W were spun with the front surface (the surface on which the pattern was formed) as the lower surface and the back surface as the upper surface. Handed over to zipper 2.
- the brush 3 and the two-fluid nozzle 5 are retracted to the outside of the outer cup 11 as shown by a two-dot chain line in FIG.
- the spin chuck 2 When the wafer W is delivered to the spin chuck 2, the spin chuck 2 is rotated by driving the motor 26 shown in FIG. Also, supply nozzle 7 to wafer
- the brush support arm 40 is moved above the wafer W, and the brush 3 is moved above the center P of the wafer W shown in FIG.
- the brush 3 is lowered by rotating the brush 3 by the rotating mechanism 41, and the brush 3 is moved to the center P of the wafer W.
- the cleaning position Sb by the brush 3 is set at the center of the wafer W.
- the cleaning position Sb by the brush 3 is set at the center of the wafer W.
- the two-fluid nozzle support arm 50 is moved above the wafer W, and the brush 3 is moved to the center P
- the two-fluid nozzle support arm 50 is moved in parallel toward the left side of the wafer W, and the two-fluid nozzle 5 is moved toward the left side of the wafer W.
- the cleaning position Sn of the two-fluid nozzle 5 is moved with the center P force of the wafer W toward the left peripheral edge of the wafer W.
- the upper surface of the wafer W is cleaned while enlarging the region An.
- the two-fluid nozzle 5 The droplets ejected from the nozzle and the cleaning liquid supplied from the supply nozzle 7 flow toward the periphery of the wafer W due to the centrifugal force accompanying the rotation of the wafer W, and are received by the outer cup 11 shown in FIG. The liquid is drained from the inside through a drain passage, not shown.
- the cleaning is performed by moving the two-fluid nozzle 5 toward the center P side of the wafer W toward the periphery.
- the cleaning position Sn with the two-fluid nozzle 5 is always more centered than the cleaning position Sb with the brush 3
- the cleaning with the two-fluid nozzle 5 is performed at the same time as the cleaning with the brush 3 as described above, if the supply of the cleaning liquid from the supply nozzle 7 is stopped, the cleaning liquid is prevented from scattering and the wafer W is cleaned. Washing can be suitably performed. Even if the supply of the cleaning liquid from the supply nozzle 7 is stopped, the cleaning liquid droplets ejected from the two-fluid nozzle 5 spread and spread on the upper surface of the wafer W, so the cleaning liquid is supplied to the cleaning position Sb of the brush 3. Scrub cleaning can be suitably performed while performing the cleaning. Note that it is preferable that the two-fluid nozzle 5 spray droplets onto the scrub-cleaned surface while the surface scrub-cleaned by the brush 3 is not dried but wet. This makes it possible to reliably remove contaminants from the wafer W.
- the moving speed of the cleaning position Sb by the brush 3 and the moving speed of the cleaning position Sn by the two-fluid nozzle 5 are set to be slower as the wafer W moves from the center to the periphery. preferable. This improves the contaminant removal performance. Furthermore, it is preferable that the two-fluid nozzle 5 be moved faster than the brush 3 so that the moving speed of the cleaning position Sn by the two-fluid nozzle 5 is faster than the moving speed of the cleaning position Sb by the brush 3. As a result, the cleaning time for the wafer W can be reduced.
- the distance from the cleaning position Sn to the position P is almost equal to the distance from the center P to the position P Is preferable.
- the cleaning position Sn by the two-fluid nozzle 5 is quickly moved to the portion that was in contact immediately before the brush 3 was separated, and the peripheral portion of the wafer W by the two-fluid nozzle 5 was moved. Can be promptly washed. Therefore, the cleaning time of the wafer W can be reduced.
- the brush 3 is moved up by the elevating and rotating mechanism 41 to separate the brush body 43 from the wafer W. This prevents the brush 3 from colliding with the holding member 25 of the spin chuck 2. Then, at the same time as the brush 3 is separated by the force of the wafer W, the cleaning position Sn by the two-fluid nozzle 5 is moved to the portion that was in contact immediately before the brush 3 was separated, and the peripheral portion was cleaned by the jet flow of the droplet. . If there is a possibility that the collision between the droplet and the holding member 25 will adversely affect the wafer W, the cleaning position Sn by the two-fluid nozzle 5 should not be too close to the holding member 25.
- the center P force is also preferably the distance to the washing position Sn by the two-fluid nozzle 5 from the center o.
- the wafer W After cleaning the wafer W, the wafer W is rotated at a higher speed than at the time of cleaning, and the wafer W is spin-dried. After the spin drying, the spin chuck 2 is stopped, a transfer arm (not shown) is advanced into the chamber 18, and the wafer W is received from the spin chuck 2 and unloaded from the chamber 18.
- the second position o is closer to the center P side than the cleaning position Sb by the brush 3.
- the area Ab after the brush 3 comes into contact can be washed by the droplet jets. Therefore, even if dirt is transferred from the brush 3 to the wafer W, the transferred dirt can be removed.
- the brush 3 is brought into contact with the periphery of the wafer W. Even if not performed, the peripheral portion of the wafer W can be cleaned by the two-fluid nozzle 5. Even if cleaning of a plurality of wafers W is continued, transfer of dirt from the brush 3 to the wafers W can be prevented. Therefore, without cleaning or replacing the brush 3 in the middle, it is possible to continuously clean a plurality of brushes W, thereby improving the throughput.
- the substrate is not limited to a semiconductor wafer, but may be another glass for an LCD substrate, a CD substrate, a printed substrate, a ceramic substrate, or the like.
- the two-fluid nozzle 5 ejects pure water droplets, but the droplets ejected from the two-fluid nozzle 5 are not limited to this, and may be, for example, a chemical solution or other cleaning liquid other than pure water. It may be.
- the gas mixed with the cleaning liquid in the two-fluid nozzle 5 may be a gas other than the nitrogen gas.
- the structure of the two-fluid nozzle 5 is not limited to the internal mixing type shown in the embodiment, and may be, for example, an external mixing type in which the cleaning liquid and the gas are mixed outside.
- the cleaning liquid supplied from the supply nozzle 7 is not limited to pure water, but may be a processing liquid other than pure water, such as a chemical liquid.
- the cleaning liquid was supplied to the center P of the wafer W.
- Force may be supplied to other places. For example, an intermediate position between the center p and the periphery of the wafer w
- the cleaning liquid may also be supplied to the device.
- the supply of the cleaning liquid from the supply nozzle 7 may not be performed.
- the droplet is diffused over the entire upper surface of the wafer w, and a liquid film of the cleaning liquid can be formed on the upper surface of the wafer w. Also, the cleaning position Sb of the brush 3 located at the center P of the wafer W
- the droplets ejected from the two-fluid nozzle 5 are diffused and supplied, so that scrub cleaning can be suitably performed.
- the brush 3 is brought into contact with the center P of the wafer W, the two-fluid nozzle 5
- the position is such that the droplet is ejected near the cleaning position Sb by the brush 3.
- the droplet can be suitably diffused over the entire upper surface of the wafer W, and the droplet can be suitably supplied to the cleaning position Sb. In this way, brush 3
- the two-fluid nozzle 5 is moved to the left while the brush 3 is moved to the right to move the cleaning position Sb toward the periphery of the wafer W in the same manner as in the method described in the embodiment. Move the cleaning position Sn toward the center of the wafer W and the peripheral edge. ,.
- the two-fluid nozzle support arm 50 and the two-fluid nozzle 5 move to the left in the direction opposite to the direction in which the brush support arm 40 and the brush 3 move.
- the cleaning position Sn by the two-fluid nozzle 5 was moved to the left opposite to the right direction, which is the moving direction of the cleaning position Sb by the brush 3, but the brush support arm 40, the brush 3 and the cleaning position Sb were moved.
- the movement direction of the two-fluid nozzle support arm 50, the two-fluid nozzle 5 and the cleaning position Sn is not limited to the powerful direction.
- the two-fluid nozzle supporting arm 50, the two-fluid nozzle 5 and the cleaning position Sn may move in the same direction as the moving directions of the brush supporting arm 40, the brush 3, and the cleaning position Sb.
- a support arm 80 that supports and moves the brush 3 and the two-fluid nozzle 5 may be provided.
- the base end of the support arm 80 is movably supported along a guide rail 82.
- a drive mechanism 83 for moving the support arm 80 along the guide rail 82 is provided.
- the drive of the drive mechanism 83 is controlled by the control unit 15, and the moving speed and position of the support arm 80 can be changed by controlling the drive mechanism 83.
- the two-fluid nozzle 5 is arranged and supported on the support arm 80 behind the brush 3 in the moving direction of the brush 3 with respect to the wafer W being cleaned by the brush 3.
- the two-fluid nozzle 5 is provided to the left of the brush 3.
- the washing position Sn by the two-fluid nozzle 5 is arranged on the left side of the washing position Sb by the brush 3, that is, on the center P side.
- a second two-fluid nozzle 85 be disposed on the support arm 80 behind the brush 3 with respect to the rotation direction of the wafer W.
- the droplet can be instantaneously ejected from the second two-fluid nozzle 85 behind the brush 3 for cleaning, and the brush 3 is separated.
- the cleaning by the second two-fluid nozzle 85 can also be terminated. That is, after cleaning with brush 3, Since the droplets can be ejected to the peripheral portion of the wafer W immediately without moving the arm 80, the cleaning can be performed efficiently and the throughput can be improved.
- it can be composed of one support arm 80, and the structure and control can be simplified.
- control unit 15 including the control computer 90 having the recording medium 91 storing the control software.
- the specific mode of the recording medium 91 is the same as that described for the recording medium 91 shown in FIGS. 1 and 2, and thus the description thereof will be omitted.
- the moving direction of the two-fluid nozzle 5 and the cleaning position Sn and the moving direction of the brush 3 and the cleaning position Sn are not limited to being on the same straight line. For example, they may be arranged at an angle to each other.
- the moving direction of the cleaning position Sn by the two-fluid nozzle 5 and the two-fluid nozzle and the moving direction of the cleaning position Sb by the brush 3 and the brush 3 need not be linear.
- the means for moving the two-fluid nozzle 5 and the brush 3 is not limited to the brush support arm 40, the two-fluid nozzle support arm 50, and the guide rails 60 and 61.
- an arm that supports the brush 3 and rotates above the wafer W is provided, and the cleaning position Sb by the brush 3 is moved on the upper surface of the wafer W so that the center P force also rotates toward the peripheral edge. good.
- An arm that supports the body nozzle 5 and rotates above the wafer W is provided, and the cleaning position Sn by the two-fluid nozzle 5 is moved so as to rotate on the upper surface of the wafer W toward the center P force peripheral edge.
- It may be moved so as to rotate with respect to the part.
- the brush 3 is brought into contact with the center P of the
- overscanning may be performed from behind the center P of the wafer W. That is
- the injection of the two-fluid nozzle 5 is started at the center P of the wafer W, and the cleaning position Sn is moved by the two-fluid nozzle 5.
- the center P force of the wafer W was also started, but in the moving direction of the two-fluid nozzle 5,
- the overscan may be performed from behind the center P of the wafer W. That is, second-class
- the cleaning position Sb by the brush 3 is on the center P side from the peripheral edge of the wafer W.
- the holding member 25 of the spin chuck 2 and the brush 3 are prevented from colliding with each other.
- the spin chuck is configured to suction-hold the lower surface of the wafer W
- the spin chuck 2 If there is no concern that the holding member 25 and the brush 3 will collide with each other, the cleaning position Sb by the brush 3 may be moved to the periphery of the wafer W to scrub the entire upper surface of the wafer W.
- the rotation speed, the moving speed of the brush, the processing time of scrub cleaning with the brush, and the like were set to the same conditions as in the brush cleaning in the embodiment.
- the particle removal rate was about 88.0%
- the cleaning rate shown in the present embodiment was as follows. It was confirmed that the contaminant removal performance was lower than the method. In particular, it was clear that many particles tend to remain in the center of the wafer W.
- the particle removal rate was about 85.5%, which was lower than the cleaning method described in this embodiment and the cleaning method described in Comparative Example 1. It was confirmed that the material removal performance was low. In particular, it was found that many particles tend to remain in the center of the wafer W.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Cleaning Or Drying Semiconductors (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020057020693A KR100648165B1 (ko) | 2004-04-06 | 2005-04-05 | 기판 세정 장치, 기판 세정 방법 및 그 방법에 사용되는프로그램을 기록한 매체 |
EP05728772A EP1737025A4 (en) | 2004-04-06 | 2005-04-05 | BOARD CLEANING DEVICE, BOARD CLEANING PROCEDURE AND MEDIUM WITH RECORDED PROGRAM FOR USE IN THE PROCESS |
US10/593,560 US7803230B2 (en) | 2004-04-06 | 2005-04-05 | Substrate cleaning apparatus, substrate cleaning method, and medium for recording program used for the method |
JP2006512090A JP4423289B2 (ja) | 2004-04-06 | 2005-04-05 | 基板洗浄装置、基板洗浄方法及びその方法に使用するプログラムを記録した媒体 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-112179 | 2004-04-06 | ||
JP2004112179 | 2004-04-06 |
Publications (1)
Publication Number | Publication Date |
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WO2005098919A1 true WO2005098919A1 (ja) | 2005-10-20 |
Family
ID=35125356
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Application Number | Title | Priority Date | Filing Date |
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PCT/JP2005/006675 WO2005098919A1 (ja) | 2004-04-06 | 2005-04-05 | 基板洗浄装置、基板洗浄方法及びその方法に使用するプログラムを記録した媒体 |
Country Status (7)
Country | Link |
---|---|
US (1) | US7803230B2 (ja) |
EP (1) | EP1737025A4 (ja) |
JP (1) | JP4423289B2 (ja) |
KR (1) | KR100648165B1 (ja) |
CN (1) | CN100449702C (ja) |
TW (1) | TWI286782B (ja) |
WO (1) | WO2005098919A1 (ja) |
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JP2017147334A (ja) * | 2016-02-17 | 2017-08-24 | 株式会社荏原製作所 | 基板の裏面を洗浄する装置および方法 |
US10651057B2 (en) | 2017-05-01 | 2020-05-12 | Ebara Corporation | Apparatus and method for cleaning a back surface of a substrate |
CN111081603A (zh) * | 2019-11-25 | 2020-04-28 | 北京北方华创微电子装备有限公司 | 晶圆清洗设备及晶圆清洗方法 |
CN111081603B (zh) * | 2019-11-25 | 2024-02-27 | 北京北方华创微电子装备有限公司 | 晶圆清洗设备及晶圆清洗方法 |
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JPWO2005098919A1 (ja) | 2008-03-06 |
US20070175501A1 (en) | 2007-08-02 |
EP1737025A4 (en) | 2009-03-11 |
CN1965395A (zh) | 2007-05-16 |
US7803230B2 (en) | 2010-09-28 |
EP1737025A1 (en) | 2006-12-27 |
TW200537570A (en) | 2005-11-16 |
KR20060008952A (ko) | 2006-01-27 |
JP4423289B2 (ja) | 2010-03-03 |
TWI286782B (en) | 2007-09-11 |
CN100449702C (zh) | 2009-01-07 |
KR100648165B1 (ko) | 2006-11-28 |
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