WO2010024062A1 - 基板洗浄方法および基板洗浄装置 - Google Patents
基板洗浄方法および基板洗浄装置 Download PDFInfo
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- WO2010024062A1 WO2010024062A1 PCT/JP2009/062968 JP2009062968W WO2010024062A1 WO 2010024062 A1 WO2010024062 A1 WO 2010024062A1 JP 2009062968 W JP2009062968 W JP 2009062968W WO 2010024062 A1 WO2010024062 A1 WO 2010024062A1
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- substrate
- cleaning
- droplets
- droplet
- liquid
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- 238000004140 cleaning Methods 0.000 title claims abstract description 411
- 239000000758 substrate Substances 0.000 title claims abstract description 250
- 238000000034 method Methods 0.000 title claims abstract description 72
- 239000007788 liquid Substances 0.000 claims abstract description 194
- 238000009826 distribution Methods 0.000 claims abstract description 61
- 239000004065 semiconductor Substances 0.000 claims description 35
- 238000007599 discharging Methods 0.000 claims description 21
- 230000006378 damage Effects 0.000 abstract description 11
- 239000000356 contaminant Substances 0.000 description 12
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- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 8
- 239000012530 fluid Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 8
- 239000000919 ceramic Substances 0.000 description 7
- 239000002245 particle Substances 0.000 description 6
- 239000011796 hollow space material Substances 0.000 description 5
- 230000001965 increasing effect Effects 0.000 description 4
- 239000010453 quartz Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 2
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- 238000005086 pumping Methods 0.000 description 2
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
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- 229920005989 resin Polymers 0.000 description 1
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Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02041—Cleaning
- H01L21/02057—Cleaning during device manufacture
-
- 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
-
- 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 provides a substrate cleaning method for cleaning by discharging droplets of a cleaning liquid onto a semiconductor substrate, a glass substrate for a liquid crystal display device, a glass substrate for a photomask, a substrate for an optical disk, a ceramic plate (hereinafter simply referred to as “substrate”).
- substrate a ceramic plate
- a cleaning process for removing particles adhering to the substrate has been essential.
- a technique for cleaning a substrate by ejecting minute droplets of a cleaning liquid such as pure water toward the substrate is used.
- Patent Document 1 a cleaning liquid and a pressurized gas are mixed to generate droplets, and a mixed fluid of the droplets and gas is ejected onto a substrate. Fluid nozzles are widely used. Foreign substances such as particles adhering to the substrate are physically removed by the kinetic energy of the cleaning liquid droplets.
- Patent Document 2 discloses a cleaning apparatus that causes a mist of cleaning liquid accelerated in one direction from a discharge port to be jetted toward a substrate at high speed by causing a piezoelectric element to repeatedly expand and contract at a frequency in the ultrasonic band. It is disclosed.
- Patent Document 3 discloses a droplet spray device that generates droplets by vibrating a thin film having a reverse-tapered discharge port.
- ink is filled by filling ink in an annular pipe having a notch and attaching a vibrator to an outer peripheral wall surface other than the notch of the pipe to vibrate the ink.
- An inkjet printer nozzle head for ejecting droplets is disclosed.
- the present invention has been made in view of the above problems, and an object of the present invention is to provide a substrate cleaning method and a substrate cleaning apparatus capable of improving the substrate cleaning efficiency.
- the average droplet diameter is 15 ⁇ m or more and 200 ⁇ m or less, and the droplet diameter
- the droplets of the cleaning liquid having a distribution of 3 ⁇ ( ⁇ is a standard deviation) and within 10% of the average droplet diameter are generated and discharged toward the substrate.
- the average droplet velocity is 20 meters / second or more and 100 meters / second or less, and the droplet velocity distribution is 3 ⁇ ( ⁇ is a standard deviation). Droplets that are within 10% of the average droplet velocity are discharged toward the substrate.
- the droplets are ejected toward the substrate at a droplet flow rate of 10 milliliters per minute or more.
- the average droplet diameter is 15 ⁇ m or more and 30 ⁇ m or less, and the distribution of the droplet diameter is 3 ⁇ ( ⁇ is a standard deviation) ), Droplets of the cleaning liquid within 2 ⁇ m or less are generated and discharged toward the semiconductor substrate.
- the average droplet velocity is 20 meters / second or more and 60 meters / second or less, and the droplet velocity distribution is 3 ⁇ ( ⁇ is a standard deviation). Liquid droplets that are contained within a meter per second are discharged toward the semiconductor substrate.
- the droplets are ejected toward the semiconductor substrate at a droplet flow rate of 10 milliliters per minute or more.
- the cleaning liquid is supplied to a cylindrical body having a plurality of discharge holes formed in the wall surface, and the cleaning liquid is vibrated.
- the average droplet diameter from the plurality of ejection holes is 15 ⁇ m or more and 200 ⁇ m or less, and the distribution of the droplet diameter is 3 ⁇ ( ⁇ is a standard deviation) and is within 10% of the average droplet diameter.
- a droplet is discharged toward the substrate.
- an average droplet velocity from the plurality of ejection holes is 20 meters / second or more and 100 meters / second or less, and a droplet velocity distribution is 3 ⁇ ( ⁇ Is a standard deviation), and droplets falling within 10% of the average droplet velocity are discharged toward the substrate.
- droplets of the cleaning liquid are ejected from the plurality of ejection holes toward the substrate at a droplet flow rate of 10 ml / min or more. .
- the cleaning liquid in the substrate cleaning method for cleaning the semiconductor substrate by discharging droplets of the cleaning liquid, the cleaning liquid is supplied to a cylindrical body having a plurality of discharge holes formed in the wall surface, and the cleaning liquid is vibrated.
- the droplets of the cleaning liquid having an average droplet diameter of 15 ⁇ m or more and 30 ⁇ m or less from the plurality of discharge holes and a droplet diameter distribution of 3 ⁇ ( ⁇ is a standard deviation) within 2 ⁇ m or less are applied to the semiconductor substrate. Dispense towards.
- the average droplet velocity from the plurality of ejection holes is 20 meters / second or more and 60 meters / second or less, and the droplet velocity distribution is 3 ⁇ ( ⁇ Is a standard deviation), and droplets that are within 5 meters per second are discharged toward the semiconductor substrate.
- cleaning liquid droplets are discharged toward the semiconductor substrate at a liquid droplet flow rate of 10 milliliters per minute or more from the plurality of discharge holes. To do.
- a cylindrical body having a plurality of discharge holes formed in a wall surface and a piezoelectric element attached to the wall surface are provided.
- the average droplet diameter from the plurality of ejection holes is 15 ⁇ m or more and 200 ⁇ m or less, and the distribution of the droplet diameter is 3 ⁇ ( ⁇ is the standard)
- a cleaning nozzle that discharges the liquid droplets of the cleaning liquid that are within 10% of the average liquid droplet diameter toward the substrate is provided.
- the cleaning nozzle has an average droplet velocity from the plurality of ejection holes of 20 meters / second or more and 100 meters / second or less. Droplets having a distribution of 3 ⁇ ( ⁇ is a standard deviation) and falling within 10% of the average droplet speed are ejected toward the substrate.
- the cleaning nozzle is configured to drop the cleaning liquid droplets from the plurality of discharge holes at a liquid droplet flow rate of 10 milliliters per minute or more. Discharge toward
- a cylindrical body having a plurality of discharge holes formed in a wall surface and a piezoelectric element attached to the wall surface are provided. Then, by applying vibration from the piezoelectric element to the cleaning liquid fed to the cylindrical body, the average droplet diameter is 15 ⁇ m or more and 30 ⁇ m or less from the plurality of ejection holes, and the droplet diameter distribution is 3 ⁇ ( ⁇ is A cleaning nozzle is provided for discharging droplets of the cleaning liquid, which is within 2 ⁇ m or less in standard deviation, toward the semiconductor substrate.
- the cleaning nozzle has an average droplet velocity of 20 meters / second or more and 60 meters / second or less from the plurality of ejection holes. Droplets having a distribution of 3 ⁇ ( ⁇ is a standard deviation) and within 5 meters per second are discharged toward the semiconductor substrate.
- the cleaning nozzle causes the cleaning liquid droplets to be discharged from the plurality of discharge holes at a liquid droplet flow rate of 10 ml / min or more. Discharge toward the substrate.
- the cylindrical body is a cylinder.
- a pressure-feed pump that feeds a cleaning liquid from one end-side opening of the cylindrical body, and the other end of the cylindrical body And a valve for closing the side opening.
- the average droplet diameter is 15 ⁇ m or more and 200 ⁇ m or less
- the distribution of the droplet diameter is 3 ⁇
- the average droplet diameter is Since the droplets of the cleaning liquid within 10% or less are discharged toward the substrate, there are few useless droplets that do not contribute to cleaning, and the cleaning efficiency of the substrate can be improved.
- the average droplet velocity is 20 meters / second or more and 100 meters / second or less, and the droplet velocity distribution is 3 ⁇ and falls within 10% of the average droplet velocity. Since the droplets discharged are discharged toward the substrate, sufficient cleaning efficiency can be obtained.
- the droplets are ejected toward the substrate at a droplet flow rate of 10 milliliters per minute or more, sufficient cleaning can be performed in a short time.
- the average droplet diameter is 15 ⁇ m or more and 30 ⁇ m or less, and the distribution of the droplet diameter is 3 ⁇ or less and 2 ⁇ m or less. Since the droplets of the cleaning liquid contained in the nozzle are ejected toward the semiconductor substrate, there are few wasted droplets that do not contribute to cleaning and droplets that damage the semiconductor substrate, and the substrate cleaning efficiency can be improved.
- the average droplet velocity is 20 meters / second or more and 60 meters / second or less, and the droplet velocity distribution is 3 ⁇ and within 5 meters / second or less. Can be discharged toward the semiconductor substrate, so that sufficient cleaning efficiency can be obtained.
- FIG. 1 is a diagram showing an example of a substrate cleaning apparatus suitable for cleaning a semiconductor substrate.
- the substrate cleaning apparatus 1 is a single wafer cleaning apparatus that cleans semiconductor substrates W one by one, and removes contaminants such as particles adhering to the circular silicon substrate W for cleaning.
- the substrate cleaning apparatus 1 includes a rotation holding unit 10, a processing cup 20, a splash guard 30, a nozzle driving unit 50, a cleaning nozzle 60, and a control unit 90 as main components.
- the rotation holding unit 10 includes a spin base 11, a rotation shaft 13, and a motor 14.
- the spin base 11 is a disk-shaped member having a slightly larger diameter than the substrate W.
- a plurality (six in this embodiment) of support pins 12 are provided upright on the peripheral edge of the upper surface of the spin base 11 along the same circumference.
- Each support pin 12 includes a cylindrical support portion that supports the lower peripheral edge portion of the substrate W from below, and a pin portion that protrudes from the upper surface of the support portion and abuts against the edge portion of the substrate W to press. It is configured.
- Three of the six support pins 12 are fixed support pins fixedly installed on the spin base 11. The fixed support pin projects a pin portion on the axial center of the cylindrical support portion.
- the remaining three of the six support pins 12 are movable support pins that are rotatably (rotated) with respect to the spin base 11.
- the pin portion protrudes slightly from the axis of the cylindrical support portion.
- the three movable support pins are rotationally driven in conjunction with a link mechanism and a drive mechanism (not shown).
- Rotating shaft 13 is suspended from the center of the lower surface side of spin base 11.
- the rotary shaft 13 is linked to a drive pulley 16 of the motor 14 via a drive belt 15.
- the drive belt 15 rotates and the rotary shaft 13 rotates.
- the substrate W held by the spin base 11 rotates around the central axis RX along the vertical direction in the horizontal plane together with the spin base 11 and the rotation shaft 13.
- the inside of the rotating shaft 13 is hollow, and a processing liquid nozzle 18 is inserted in the hollow portion along the vertical direction.
- the processing liquid nozzle 18 is connected in communication with a processing liquid supply source (not shown).
- the tip of the processing liquid nozzle 18 opens toward the center of the lower surface of the substrate W held on the spin base 11. For this reason, the processing liquid can be supplied from the tip of the processing liquid nozzle 18 to the center of the lower surface of the substrate W.
- a gap between the inner wall surface of the rotating shaft 13 and the outer wall surface of the treatment liquid nozzle 18 is a gas supply channel, and is connected to a gas supply source (not shown). Gas can be supplied from the upper end of the gap toward the lower surface of the substrate W held by the spin base 11.
- a processing cup 20 is provided so as to surround the rotation holding unit 10.
- a cylindrical partition wall 21 is provided inside the processing cup 20.
- a drainage space 22 for draining the cleaning liquid used for the cleaning process of the substrate W is formed inside the partition wall 21 so as to surround the periphery of the rotation holding unit 10.
- a recovery space 23 for recovering the cleaning liquid used for the cleaning process of the substrate W is formed between the outer wall of the processing cup 20 and the partition wall 21 so as to surround the drainage space 22.
- the drainage space 22 is connected to a drainage pipe 27 for guiding the cleaning liquid to a drainage processing apparatus (not shown), and the recovery space 23 is a recovery pipe for guiding the cleaning liquid to the recovery processing apparatus (not shown). 28 is connected.
- a splash guard 30 for preventing the cleaning liquid from the substrate W from splashing outward is provided above the processing cup 20.
- the splash guard 30 has a rotationally symmetric shape with respect to the central axis RX.
- a drainage guide groove 31 having a V-shaped cross section is formed in an annular shape on the inner surface of the upper end portion of the splash guard 30.
- a recovery liquid guide portion 32 is formed on the inner surface of the lower end portion of the splash guard 30.
- a partition wall storage groove 33 for receiving the partition wall 21 of the processing cup 20 is formed near the upper end of the recovered liquid guide portion 32.
- the splash guard 30 is driven up and down along the vertical direction by a guard up / down drive mechanism 35 constituted by a ball screw mechanism or the like.
- the guard lifting / lowering drive mechanism 35 includes the splash guard 30, a recovery position that surrounds the edge of the substrate W where the recovery liquid guide portion 32 is held by the spin base 11, and a drainage guide groove 31 held by the spin base 11.
- the substrate is moved up and down with respect to the drainage position surrounding the edge of the substrate W.
- the splash guard 30 is in the recovery position (position shown in FIG. 1), the cleaning liquid splashed from the edge of the substrate W is guided to the recovery space 23 by the recovery liquid guide 32 and recovered via the recovery pipe 28. Is done.
- the splash guard 30 when the splash guard 30 is at the drainage position, the cleaning liquid splashed from the edge of the substrate W is guided to the drainage space 22 by the drainage guide groove 31 and drained through the drainage pipe 27. The In this way, the drainage and recovery of the cleaning liquid can be switched and executed.
- the guard lifting / lowering drive mechanism 35 lowers the splash guard 30 to a height position where the spin base 11 protrudes from the upper end of the splash guard 30.
- the nozzle drive unit 50 includes a lift motor 51, a swing motor 53, and a nozzle arm 58.
- a cleaning nozzle 60 is attached to the tip of the nozzle arm 58.
- the proximal end side of the nozzle arm 58 is connected to the motor shaft 53 a of the swing motor 53.
- the swing motor 53 rotates the cleaning nozzle 60 around the motor shaft 53a in a horizontal plane.
- the swing motor 53 is attached to the lift base 54.
- the elevating base 54 is screwed to a ball screw 52 directly connected to a motor shaft of a fixed elevating motor 51 and is slidably attached to a guide member 55.
- the lifting motor 51 rotates the ball screw 52, the cleaning nozzle 60 moves up and down together with the lifting base 54.
- the cleaning nozzle 60 is moved between the retracted position outside the splash guard 30 and the cleaning position above the spin base 11 by the lift motor 51 and the swing motor 53 of the nozzle drive unit 50. Further, the cleaning nozzle 60 is swung between the upper portion of the substrate W and the upper end portion thereof by the swing motor 53 above the spin base 11.
- control unit 90 controls various operation mechanisms provided in the substrate cleaning apparatus 1.
- the configuration of the control unit 90 as hardware is the same as that of a general computer. That is, the control unit 90 stores a CPU that performs various arithmetic processes, a ROM that is a read-only memory that stores basic programs, a RAM that is a readable and writable memory that stores various information, control software, data, and the like. It has a magnetic disk.
- FIG. 2 is a diagram showing a schematic configuration of the cleaning nozzle 60.
- FIG. 3 is a perspective view of the cleaning nozzle 60.
- a cleaning nozzle 60 as a cleaning head is configured by attaching a piezoelectric element (piezo element) 62 to a cylindrical body 61.
- the cleaning nozzle 60 is attached to the tip of the nozzle arm 58 via a resin holder 63. In FIG. 3, the holder 63 is omitted.
- a hollow space is formed inside the cylindrical tubular body 61, and both ends thereof are opened.
- the cylindrical body 61 is made of quartz, and its longitudinal length is 50 mm.
- the tubular body 61 may be formed of ceramics such as zirconia (ZrO 2).
- a plurality (20 in this embodiment) of discharge holes 64 are formed in the wall surface of the cylindrical body 61.
- the 20 discharge holes 64 are arranged in a line along the longitudinal direction of the cylindrical body 61.
- Each discharge hole 64 has a substantially cylindrical shape that penetrates the side wall of the cylindrical body 61.
- the diameter of the 20 discharge holes 64 is uniform and is in the range of 7 ⁇ m to 12 ⁇ m.
- the arrangement pitch of 20 discharge holes 64 is 1 mm.
- a piezoelectric element 62 is attached to the outer wall surface of the portion of the wall surface of the cylindrical body 61 that faces the plurality of discharge holes 64.
- the piezoelectric element 62 is electrically connected to a power source 65 having a high frequency generator.
- the power source 65 applies an AC voltage having a predetermined frequency to the piezoelectric element 62.
- One end side opening of the inner space of the cylindrical body 61 is connected to a cleaning liquid supply source 71 through a supply pipe 70.
- a pressure feed pump 72 and a filter 73 are inserted in the middle of the supply pipe 70.
- the pumping pump 72 pumps the cleaning liquid (pure water in this embodiment) from the cleaning liquid supply source 71 toward the cleaning nozzle 60.
- the filter 73 removes foreign matters contained in the cleaning liquid supplied from the cleaning liquid supply source 71.
- a discharge pipe 75 is connected to the opening on the other end side of the inner space of the cylindrical body 61.
- a valve 76 is inserted in the path of the discharge pipe 75. When the valve 76 is opened while supplying the cleaning liquid to the inner space of the cylindrical body 61 from the supply pipe 70, the cleaning liquid is discharged from the discharge pipe 75 to the outside of the apparatus.
- the processing operation described below is performed by the control unit 90 executing predetermined cleaning processing software to control each mechanism of the substrate cleaning apparatus 1.
- the substrate W is transferred to the spin base 11 with the splash guard 30 lowered and the spin base 11 protruding above the splash guard 30. Subsequently, the splash guard 30 rises to the above-described drainage position, and the nozzle driving unit 50 moves the cleaning nozzle 60 to the cleaning position above the substrate W held on the spin base 11. At the cleaning position, the interval between the plurality of ejection holes 64 of the cleaning nozzle 60 and the substrate W is set to 5 mm or more and 25 mm or less.
- the cleaning liquid is continuously supplied to the cleaning nozzle 60 from the pressure-feed pump 72 even when the cleaning process is not performed.
- the valve 76 is opened, and the cleaning liquid fed into the cylindrical body 61 is continuously discharged from the discharge pipe 75 to the outside of the apparatus. That is, the cleaning liquid is supplied to the cleaning nozzle 60 even when the cleaning nozzle 60 stands by at the retracted position outside the splash guard 30 and when the cleaning nozzle 60 moves from the retracted position to the cleaning position above the substrate W.
- the cleaning liquid continues to be discharged out of the apparatus.
- the cleaning liquid may be discharged from the processing liquid nozzle 18 toward the lower surface of the substrate W.
- the cleaning nozzle 60 is swung between the upper portion of the substrate W and the upper end portion thereof by the nozzle driving unit 50, and the cleaning process proceeds.
- the valve 76 is closed while supplying the cleaning liquid to the cleaning nozzle 60. For this reason, the liquid pressure of the cleaning liquid in the cylindrical body 61 rises, and thereby the cleaning liquid is discharged from the 20 discharge holes 64.
- the liquid pressure of the cleaning liquid inside the cylindrical body 61 is set to 10 MPa or less.
- the power source 65 applies an AC voltage having a predetermined frequency to the piezoelectric element 62.
- the piezoelectric element 62 repeatedly expands and contracts, and vibration with a predetermined frequency is applied to the cleaning liquid inside the cylindrical body 61.
- the cleaning liquid flowing out from the 20 discharge holes 64 due to the liquid pressure is dispersed and divided by vibration to generate droplets of the cleaning liquid. Is discharged.
- the liquid flow flowing out from the discharge hole 64 is divided to generate droplets according to the following process.
- the cleaning liquid is supplied while being maintained at a constant pressure or a pressure having a narrow range (D.C.pressure: DC pressure). From the discharge holes 64, the cleaning liquid flows out at the substantially same discharge rate in the 20 discharge holes 64 by the pressure. In this state, when an alternating voltage of a predetermined frequency fixed to the piezoelectric element 62 is applied, the liquid flow is dispersed and divided by the generated vibrations to form droplets.
- the supply pressure of the cleaning liquid by the pressure feed pump 72 and the frequency of the alternating current applied to the piezoelectric element 62 are values outside the normal operating range of the continuous ink jet apparatus as described in the prior art. Contaminants such as particles adhering to the substrate W are physically removed by the kinetic energy of the droplets discharged from the cleaning nozzle 60.
- control unit 90 controls the pumping pump 72 to adjust the liquid pressure of the cleaning liquid inside the cylindrical body 61, and also controls the power source 65 to adjust the vibration applied to the cleaning liquid, so that the 20 discharge holes are adjusted.
- the discharge conditions (parameters) of the droplets discharged from 64 can be defined. In addition to these, the diameter and number of the discharge holes 64 also affect the droplet discharge conditions.
- the average droplet diameter of the cleaning liquid droplets discharged from the 20 discharge holes 64 toward the substrate W is 15 ⁇ m or more and 30 ⁇ m or less. What is important here is that the droplet diameters of the droplets discharged from the cleaning nozzle 60 are not widely distributed over a range of 15 ⁇ m to 30 ⁇ m, but have very small variations. Specifically, the distribution of droplet diameters is 3 ⁇ ( ⁇ is a standard deviation) within 2 ⁇ m or less.
- FIG. 4 is a diagram showing the distribution of the droplet diameter of the cleaning liquid.
- the droplet diameter distribution of the droplets discharged from the cleaning nozzle 60 of the present embodiment is indicated by a solid line
- the droplet diameter distribution of the droplets discharged from the conventional two-fluid nozzle is indicated by a dotted line.
- the droplet diameters of the droplets ejected from the conventional two-fluid nozzle have a wide distribution and include droplets having a droplet diameter of 15 to 30 ⁇ m, but droplets having a droplet diameter outside the range are also included. Contains a large amount. Compared with this, the distribution of droplet diameters of the droplets discharged from the cleaning nozzle 60 of the present embodiment is extremely narrow, and there is almost no variation.
- the average droplet speed of the cleaning liquid droplets discharged from the 20 discharge holes 64 toward the substrate W is set to 20 meters / second or more and 60 meters / second or less. Similar to the droplet diameter, the droplet velocity of the droplets ejected from the cleaning nozzle 60 is not widely distributed over the range of 20 meters per second to 60 meters per second, and has very little variation. Specifically, the droplet velocity distribution is 3 ⁇ or less and 5 meters per second or less.
- FIG. 5 is a diagram showing the distribution of the droplet velocity of the cleaning liquid. Also in this figure, the droplet velocity distribution of the droplets ejected from the cleaning nozzle 60 of the present embodiment is indicated by a solid line, and the droplet velocity distribution of the droplets ejected from the conventional two-fluid nozzle is indicated by a dotted line. Yes. Compared to the very wide distribution of the droplet velocity discharged from the conventional two-fluid nozzle, the droplet velocity distribution of the droplet discharged from the cleaning nozzle 60 of the present embodiment. Is extremely narrow.
- the dispersion of the droplet diameter and the droplet velocity of the droplets discharged from the cleaning nozzle 60 of the present embodiment can be within a small range in the cleaning liquid filled in the cylindrical body 61 with high pressure. This is because vibration is applied from the piezoelectric element 62 and discharged from the plurality of discharge holes 64.
- the droplets are discharged as a multiphase flow with the gas, making control difficult.
- the dispersion of the droplet diameter and the droplet velocity of the droplets is widely varied.
- the cleaning nozzle 60 of this embodiment since the pressurized liquid is ejected from the plurality of ejection holes 64 while vibrating, only the liquid droplets are ejected.
- the droplet diameter and the droplet velocity can be made small with a narrow distribution.
- FIG. 6 is a diagram showing the correlation between the droplet diameter of the discharged droplet and the damage given to the substrate W.
- FIG. As shown in the figure, when the droplet diameter exceeds 30 ⁇ m, the substrate W is damaged, and the damage is increased as the droplet diameter is increased. Since the average droplet diameter of the cleaning liquid droplets discharged from the cleaning nozzle 60 is 15 ⁇ m or more and 30 ⁇ m or less, the substrate W is prevented from being damaged during the cleaning process. In addition, since the variation in droplet diameter is extremely small and 3 ⁇ m is 2 ⁇ m or less, there are no useless droplets that do not contribute to cleaning and harmful droplets that damage the substrate W. For this reason, the cleaning efficiency can be improved without damaging the substrate W.
- FIG. 7 is a diagram showing the correlation between the droplet velocity of the discharged droplet and the contaminant removal rate.
- the contaminant removal rate increases as the droplet velocity of the discharged droplet increases. Since the average droplet speed of the droplets of the cleaning liquid discharged from the cleaning nozzle 60 of the present embodiment is 20 meters / second or more and 60 meters / second or less, the necessary removal performance can be obtained. In addition, the variation in the droplet velocity is extremely small and 3 ⁇ is 5 meters per second or less, so there are almost no unnecessary droplets that do not contribute to cleaning.
- the cleaning nozzle 60 is provided with 20 discharge holes 64.
- the total flow rate of the cleaning liquid droplets discharged from the 20 discharge holes 64 toward the substrate W is set to 10 ml / min or more.
- FIG. 8 is a diagram showing the difference in the contaminant removal rate depending on the droplet flow rate of the discharged droplets.
- the dotted line indicates the contaminant removal rate when the cleaning liquid droplets are ejected at a droplet flow rate of 1 milliliter per minute
- the solid line indicates the cleaning liquid droplets at a droplet flow rate of 10 milliliters per minute. It shows the removal rate of pollutants when discharged. The higher the droplet flow rate, the higher the cleaning efficiency.
- droplets of the cleaning liquid are discharged from the cleaning nozzle 60 toward the substrate W.
- the average droplet diameter of the droplets discharged from the cleaning nozzle 60 is 15 ⁇ m or more and 30 ⁇ m or less, and its distribution is 3 ⁇ m or less and 2 ⁇ m or less.
- the average droplet velocity of the ejected droplets is 20 meters / second or more and 60 meters / second or less, and the distribution is 3 ⁇ and 5 meters / second or less.
- the droplet flow rate of the discharged droplets is 10 ml / min or more. If droplets of the cleaning liquid are discharged from the cleaning nozzle 60 toward the substrate W while satisfying these discharge conditions, the cleaning efficiency can be improved without damaging the substrate W, and a sufficient contaminant removal rate can be obtained. It can be achieved in a short time.
- the cleaning nozzle 60 is repeatedly swung between the upper portion of the substrate W and the upper edge portion thereof, so that the entire surface of the substrate W is uniformly cleaned.
- the liquid splashed from the rotating substrate W by centrifugal force is guided to the drainage space 22 by the drainage guide groove 31 and drained from the drainage pipe 27.
- the valve 76 is opened to stop droplet discharge from the cleaning nozzle 60, and the nozzle driving unit 50 moves the cleaning nozzle 60 to the retracted position. Subsequently, the substrate W is dried by increasing the number of rotations of the substrate W. After the drying process is completed, the rotation of the substrate W is stopped, the splash guard 30 is lowered, and the processed substrate W is unloaded from the spin base 11. Thereby, a series of processing operations in the substrate cleaning apparatus 1 is completed. Note that the position of the splash guard 30 during the cleaning and drying process is preferably changed as appropriate according to the necessity of collecting or draining the cleaning liquid.
- the liquid pressure of the cleaning liquid inside the cylindrical body 61 is set to 10 MPa or less, but the liquid pressure is not limited to this.
- the diameter of the discharge hole 64 is smaller than that in the above embodiment, the hydraulic pressure needs to be higher.
- the cleaning liquid is supplied even when the cleaning process is not performed on the cleaning nozzle 60, and the cleaning liquid is discharged to the outside of the apparatus.
- This is configured as a circulation system. You may do it.
- the pipe on the downstream side of the valve 76 may be connected to the cleaning liquid supply source 71 via a filter so that the cleaning liquid from the cleaning nozzle 60 is returned to the cleaning liquid supply source 71.
- the substrate cleaning apparatus 1 of the above embodiment is suitable for cleaning a semiconductor substrate as the substrate W, but the cleaning technique according to the present invention is also applicable to cleaning other types of substrates W. Can do. Other types of substrates W include ceramic plates such as glass substrates for liquid crystal display devices and dishes.
- FIG. 9 is a diagram illustrating a substrate cleaning apparatus that performs a cleaning process on a substrate W including other types.
- the substrate W is held by the support base 111.
- the cleaning nozzle 60 as a cleaning head is moved relative to the substrate W held on the support base 111.
- the cleaning nozzle 60 may be moved above the substrate W by a slide movement mechanism (not shown), or the support base 111 may be driven while the cleaning nozzle 60 is fixed. Moreover, you may move the washing nozzle 60 manually.
- the configuration of the cleaning nozzle 60 is the same as that shown in FIGS. That is, while supplying the cleaning liquid to the cleaning nozzle 60, the valve 76 is closed to increase the liquid pressure of the cleaning liquid inside the cylindrical body 61, and the piezoelectric element 62 vibrates the cleaning liquid inside the cylindrical body 61. Then, droplets of the cleaning liquid are generated and discharged from the 20 discharge holes 64. Contaminants adhering to the substrate W are physically removed by droplets ejected from the cleaning nozzle 60.
- the control unit 90 controls the pressure feed pump 72 to adjust the liquid pressure of the cleaning liquid inside the cylindrical body 61 and also controls the power source 65 to give the vibration to the cleaning liquid. Is adjusted to regulate the discharge conditions of the droplets discharged from the 20 discharge holes 64.
- the average droplet diameter of the cleaning liquid droplets discharged from the 20 discharge holes 64 toward the substrate W is set to 15 ⁇ m or more and 200 ⁇ m or less. Similar to the above embodiment, the droplet diameters of the droplets ejected from the cleaning nozzle 60 are not widely distributed over a range of 15 ⁇ m to 200 ⁇ m, and the variation is extremely small. Specifically, the droplet size distribution is 3 ⁇ ( ⁇ is a standard deviation) and is within 10% of the average droplet size.
- FIG. 10 is a diagram showing the distribution of the droplet diameter of the cleaning liquid.
- the droplets of distribution DA have a relatively small average droplet diameter and are suitable for cleaning a semiconductor substrate.
- the droplets of distribution DB have a relatively large average droplet diameter and are suitable for cleaning the ceramic plate.
- the distribution of the droplet diameters of the droplets discharged from the cleaning nozzle 60 is extremely narrow, 3 ⁇ and 10% or less of the average droplet diameter, and there is almost no variation. Therefore, there are no useless droplets that do not contribute to cleaning and harmful droplets that damage the substrate W. For this reason, the cleaning efficiency can be improved without damaging the substrate W.
- the average droplet diameter increases, the variation gradually increases.
- the average droplet diameter exceeds 200 ⁇ m, it is difficult to keep the distribution of the droplet diameter at 3 ⁇ to 10% or less of the average droplet diameter. Also, in the manufacture of the cleaning nozzle 60, if the average droplet diameter exceeds 200 ⁇ m, the variation cannot be suppressed and is not practical.
- the average droplet velocity of the cleaning liquid droplets ejected from the 20 ejection holes 64 toward the substrate W is set to 20 meters / second or more and 100 meters / second or less. Similar to the droplet diameter, the droplet velocity of the droplets ejected from the cleaning nozzle 60 is not widely distributed over a range of 20 meters per second to 100 meters per second, and the variation is extremely small. Specifically, the droplet velocity distribution is 3 ⁇ ( ⁇ is a standard deviation) and falls within 10% of the average droplet velocity. Note that the liquid pressure of the cleaning liquid supplied to the cleaning nozzle 60 is not limited to 10 MPa or less, and supply at a higher pressure is required depending on conditions such as the diameter of the discharge hole 64.
- FIG. 11 is a diagram showing the distribution of the droplet velocity of the cleaning liquid.
- droplets having a relatively low average droplet velocity such as distribution DC
- droplets having a relatively large average droplet velocity such as distribution DD
- the droplet velocity distribution of the droplets ejected from the cleaning nozzle 60 is as narrow as 3 ⁇ and 10% or less of the average droplet velocity, and there is almost no variation. Therefore, there are almost no useless droplets that do not contribute to cleaning.
- the average droplet velocity increases, the variation gradually increases. When the average droplet velocity exceeds 100 meters per second, it becomes difficult to keep the droplet velocity distribution within 3% at 3 ⁇ .
- the total flow rate of the cleaning liquid droplets discharged from the 20 discharge holes 64 toward the substrate W is set to 10 ml / min or more. If the droplets of the cleaning liquid are discharged from the cleaning nozzle 60 toward the substrate W while satisfying these discharge conditions according to the type of the substrate W, it is harmful that damages useless droplets that do not contribute to cleaning or the substrate W. Thus, there is no liquid droplet, the cleaning efficiency can be improved without damaging the substrate W, and a sufficient contaminant removal rate can be achieved in a short time.
- FIG. 12 is a diagram illustrating another example of the cleaning nozzle.
- the cleaning nozzle 160 in FIG. 12 is configured by attaching a piezoelectric element 162 to a rectangular columnar tubular body 161.
- the cylindrical body 161 has a quadrangular prism-shaped outer shape, and a quadrangular prism-shaped hollow space is formed inside thereof. Both ends of the hollow space of the cylindrical body 161 are opened, and one end thereof is connected to the supply pipe 70 and the other end is connected to the discharge pipe 75 (see FIG. 2) as in the above embodiment.
- the cylindrical body 161 may be formed of ceramics such as quartz or zirconia.
- a plurality of (for example, 20) discharge holes 164 are formed in one side wall surface of the cylindrical body 161.
- the 20 discharge holes 164 are arranged in a line along the longitudinal direction of the cylindrical body 161.
- the size and arrangement pitch of the plurality of discharge holes 164 are the same as the plurality of discharge holes 64 in the above embodiment.
- the width of the side wall surface provided with the plurality of discharge holes 164 is 10 mm.
- a piezoelectric element 162 is attached to the outer wall surface of the other side wall of the cylindrical body 161 (a side wall opposite to the side wall provided with the plurality of discharge holes 164).
- the piezoelectric element 162 is electrically connected to the power source 65.
- the power source 65 applies an AC voltage having a predetermined frequency to the piezoelectric element 162.
- the overall configuration of the substrate cleaning apparatus including the cleaning nozzle 160 and the configuration around the cleaning nozzle 160 are the same as those in the above embodiment.
- the cleaning liquid is continuously supplied to the cleaning nozzle 160, and when performing the cleaning process, the cleaning liquid is discharged from the plurality of discharge holes 164 by closing the valve 76. Further, when performing the cleaning process, the piezoelectric element 162 applies vibration to the cleaning liquid inside the cylindrical body 161. Accordingly, as in the above-described embodiment, cleaning liquid droplets are generated and discharged from the plurality of discharge holes 164.
- the cleaning nozzle 260 of FIG. 13 includes a cylindrical body 261 having a polygonal column shape.
- the cylindrical body 261 has a polygonal column-shaped outer shape, and a polygonal column-shaped hollow space is formed inside thereof. Both ends of the hollow space of the cylindrical body 261 are opened, and one end thereof is connected to the supply pipe 70 and the other end is connected to the discharge pipe 75 (see FIG. 2) as in the above embodiment.
- the cylindrical body 261 may be formed of ceramics such as quartz or zirconia.
- a plurality of (for example, 20) discharge holes 264 are formed in one row on one side wall surface of the cylindrical body 261.
- the size and arrangement pitch of the plurality of discharge holes 264 are the same as the plurality of discharge holes 64 in the above embodiment.
- a piezoelectric element 262 is attached to the outer wall surface of the side wall opposite to the side wall provided with the plurality of ejection holes 264. The piezoelectric element 262 is electrically connected to the power source 65.
- the overall configuration of the substrate cleaning apparatus including the cleaning nozzle 260 and the configuration around the cleaning nozzle 260 are the same as those in the above embodiment.
- the cleaning liquid is continuously supplied to the cleaning nozzle 260.
- the cleaning liquid is discharged from the plurality of discharge holes 264 by closing the valve 76.
- the piezoelectric element 262 applies vibration to the cleaning liquid inside the cylindrical body 261. As a result, as in the above embodiment, droplets of the cleaning liquid are generated and discharged from the plurality of discharge holes 264.
- FIG. 14A is a longitudinal sectional view of the cleaning nozzle 360
- FIG. 14B is a transverse sectional view of the cleaning nozzle 360
- FIG. 14 includes a cylindrical body 361 having a rectangular parallelepiped shape.
- the inner space of the cylindrical body 361 is divided into a plurality of sections by a plurality of partition plates 365.
- the partition plate 365 does not completely partition the plurality of sections, and the plurality of sections communicate with each other.
- the cylindrical body 361 has an introduction port 366 and a discharge port 367.
- the introduction port 366 and the discharge port 367 communicate with the internal space of the cylindrical body 361.
- the introduction port 366 is connected to the supply pipe 70, and the discharge port 367 is connected to the discharge pipe 75.
- the cylindrical body 361 may also be formed of ceramics such as quartz or zirconia.
- a discharge hole 364 is formed in each of the plurality of sections divided by the plurality of partition plates 365. Also in the cleaning nozzle 360, the plurality of discharge holes 364 are formed in a line, and the size and arrangement pitch of each discharge hole 364 are the same as the plurality of discharge holes 64 of the above embodiment.
- piezoelectric elements 362 are attached to the outer surfaces of both side walls of the cylindrical body 361. The piezoelectric element 362 is electrically connected to the power source 65.
- the overall configuration of the substrate cleaning apparatus including the cleaning nozzle 360 and the configuration around the cleaning nozzle 360 are the same as those in the above embodiment.
- the cleaning liquid is continuously supplied to the cleaning nozzle 360.
- the cleaning liquid is discharged from the plurality of discharge holes 364 by closing the valve 76.
- the piezoelectric element 362 applies vibration to the cleaning liquid inside the cylindrical body 361. Accordingly, as in the above-described embodiment, cleaning liquid droplets are generated and discharged from the plurality of discharge holes 364.
- the cleaning nozzle 260 shown in FIG. 13, or the cleaning nozzle 360 shown in FIG. Is the same as above. If the cleaning liquid droplets are discharged toward the substrate W while satisfying the above-mentioned discharge conditions, as in the above-described embodiment, useless droplets that do not contribute to cleaning or harmful droplets that damage the substrate W are not generated. The cleaning efficiency can be improved without damaging the substrate W, and a sufficient contaminant removal rate can be achieved in a short time.
- the cleaning nozzle can discharge cleaning liquid droplets under the above-described discharge conditions
- the cleaning liquid droplets may be applied to the substrate using cleaning nozzles other than those shown in FIGS. You may make it discharge toward W.
- the cleaning liquid is not limited to pure water, and may be an aqueous solution of a cleaning chemical.
- the overall configuration of the substrate cleaning apparatus 1 is not limited to the form shown in FIG. 1.
- a gas nozzle that blows nitrogen gas onto the substrate W after the cleaning process to dry it may be provided.
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Abstract
Description
10 回転保持部
11 スピンベース
20 処理カップ
30 スプラッシュガード
50 ノズル駆動部
60,160,260,360 洗浄ノズル
61,161,261,361 筒状体
62,162,262,362 圧電素子
64,164,264,364 吐出孔
65 電源
70 供給配管
75 排出配管
76 バルブ
90 制御部
111 支持台
W 基板
Claims (20)
- 基板(W)に洗浄液の液滴を吐出して洗浄する基板洗浄方法であって、
平均液滴径が15μm以上200μm以下であり、液滴径の分布が3σ(σは標準偏差)で前記平均液滴径の10%以下に収まっている洗浄液の液滴を生成して基板に向けて吐出することを特徴とする基板洗浄方法。 - 請求項1記載の基板洗浄方法において、
平均液滴速度が20メートル毎秒以上100メートル毎秒以下であり、液滴速度の分布が3σ(σは標準偏差)で前記平均液滴速度の10%以下に収まっている液滴を基板に向けて吐出することを特徴とする基板洗浄方法。 - 請求項1または請求項2記載の基板洗浄方法において、
前記液滴を10ミリリットル毎分以上の液滴流量にて基板に向けて吐出することを特徴とする基板洗浄方法。 - 半導体基板(W)に洗浄液の液滴を吐出して洗浄する基板洗浄方法であって、
平均液滴径が15μm以上30μm以下であり、液滴径の分布が3σ(σは標準偏差)で2μm以下に収まっている洗浄液の液滴を生成して半導体基板に向けて吐出することを特徴とする基板洗浄方法。 - 請求項4記載の基板洗浄方法において、
平均液滴速度が20メートル毎秒以上60メートル毎秒以下であり、液滴速度の分布が3σ(σは標準偏差)で5メートル毎秒以下に収まっている液滴を半導体基板に向けて吐出することを特徴とする基板洗浄方法。 - 請求項4または請求項5記載の基板洗浄方法において、
前記液滴を10ミリリットル毎分以上の液滴流量にて半導体基板に向けて吐出することを特徴とする基板洗浄方法。 - 基板(W)に洗浄液の液滴を吐出して洗浄する基板洗浄方法であって、
壁面に複数の吐出孔(64,164,264,364)を穿設した筒状体(61,161,261,361)に洗浄液を送給し、その洗浄液に振動を与えることによって前記複数の吐出孔から平均液滴径が15μm以上200μm以下であり、液滴径の分布が3σ(σは標準偏差)で前記平均液滴径の10%以下に収まっている洗浄液の液滴を基板に向けて吐出することを特徴とする基板洗浄方法。 - 請求項7記載の基板洗浄方法において、
前記複数の吐出孔から平均液滴速度が20メートル毎秒以上100メートル毎秒以下であり、液滴速度の分布が3σ(σは標準偏差)で前記平均液滴速度の10%以下に収まっている液滴を基板に向けて吐出することを特徴とする基板洗浄方法。 - 請求項7または請求項8記載の基板洗浄方法において、
前記複数の吐出孔から10ミリリットル毎分以上の液滴流量にて洗浄液の液滴を基板に向けて吐出することを特徴とする基板洗浄方法。 - 半導体基板(W)に洗浄液の液滴を吐出して洗浄する基板洗浄方法であって、
壁面に複数の吐出孔(64,164,264,364)を穿設した筒状体(61,161,261,361)に洗浄液を送給し、その洗浄液に振動を与えることによって前記複数の吐出孔から平均液滴径が15μm以上30μm以下であり、液滴径の分布が3σ(σは標準偏差)で2μm以下に収まっている洗浄液の液滴を半導体基板に向けて吐出することを特徴とする基板洗浄方法。 - 請求項10記載の基板洗浄方法において、
前記複数の吐出孔から平均液滴速度が20メートル毎秒以上60メートル毎秒以下であり、液滴速度の分布が3σ(σは標準偏差)で5メートル毎秒以下に収まっている液滴を半導体基板に向けて吐出することを特徴とする基板洗浄方法。 - 請求項10または請求項11記載の基板洗浄方法において、
前記複数の吐出孔から10ミリリットル毎分以上の液滴流量にて洗浄液の液滴を半導体基板に向けて吐出することを特徴とする基板洗浄方法。 - 基板(W)に洗浄液の液滴を吐出して洗浄する基板洗浄装置であって、
壁面に複数の吐出孔(64,164,264,364)を穿設した筒状体(61,161,261,361)および前記壁面に貼設した圧電素子(62,162,262,362)を有し、前記筒状体に送給された洗浄液に前記圧電素子から振動を与えることによって前記複数の吐出孔から平均液滴径が15μm以上200μm以下であり、液滴径の分布が3σ(σは標準偏差)で前記平均液滴径の10%以下に収まっている洗浄液の液滴を基板に向けて吐出する洗浄ノズル(60,160,260,360)を備えることを特徴とする基板洗浄装置。 - 請求項13記載の基板洗浄装置において、
前記洗浄ノズルは、前記複数の吐出孔から平均液滴速度が20メートル毎秒以上100メートル毎秒以下であり、液滴速度の分布が3σ(σは標準偏差)で前記平均液滴速度の10%以下に収まっている液滴を基板に向けて吐出することを特徴とする基板洗浄装置。 - 請求項13または請求項14記載の基板洗浄装置において、
前記洗浄ノズルは、前記複数の吐出孔から10ミリリットル毎分以上の液滴流量にて洗浄液の液滴を基板に向けて吐出することを特徴とする基板洗浄装置。 - 半導体基板(W)に洗浄液の液滴を吐出して洗浄する基板洗浄装置(1)であって、
壁面に複数の吐出孔(64,164,264,364)を穿設した筒状体(61,161,261,361)および前記壁面に貼設した圧電素子(62,162,262,362)を有し、前記筒状体に送給された洗浄液に前記圧電素子から振動を与えることによって前記複数の吐出孔から平均液滴径が15μm以上30μm以下であり、液滴径の分布が3σ(σは標準偏差)で2μm以下に収まっている洗浄液の液滴を半導体基板に向けて吐出する洗浄ノズル(60,160,260,360)を備えることを特徴とする基板洗浄装置。 - 請求項16記載の基板洗浄装置において、
前記洗浄ノズルは、前記複数の吐出孔から平均液滴速度が20メートル毎秒以上60メートル毎秒以下であり、液滴速度の分布が3σ(σは標準偏差)で5メートル毎秒以下に収まっている液滴を半導体基板に向けて吐出することを特徴とする基板洗浄装置。 - 請求項16または請求項17記載の基板洗浄装置において、
前記洗浄ノズルは、前記複数の吐出孔から10ミリリットル毎分以上の液滴流量にて洗浄液の液滴を半導体基板に向けて吐出することを特徴とする基板洗浄装置。 - 請求項13から請求項18のいずれかに記載の基板洗浄装置において、
前記筒状体は円筒であることを特徴とする基板洗浄装置。 - 請求項13から請求項19のいずれかに記載の基板洗浄装置において、
前記筒状体の一端側開口から洗浄液を送給する圧送ポンプ(72)と、
前記筒状体の他端側開口を閉止するバルブ(76)と、
をさらに備えることを特徴とする基板洗浄装置。
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US13/848,941 US20130247943A1 (en) | 2008-08-29 | 2013-03-22 | Substrate cleaning method and substrate cleaning apparatus |
US13/965,285 US10699894B2 (en) | 2008-08-29 | 2013-08-13 | Substrate cleaning method and substrate cleaning apparatus |
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Also Published As
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CN102057468A (zh) | 2011-05-11 |
KR101319744B1 (ko) | 2013-10-17 |
JP5261077B2 (ja) | 2013-08-14 |
KR20100123884A (ko) | 2010-11-25 |
CN103021810B (zh) | 2015-07-22 |
US10699894B2 (en) | 2020-06-30 |
US20130327365A1 (en) | 2013-12-12 |
US20210043441A1 (en) | 2021-02-11 |
US11610772B2 (en) | 2023-03-21 |
US20130247943A1 (en) | 2013-09-26 |
CN103021810A (zh) | 2013-04-03 |
JP2010056376A (ja) | 2010-03-11 |
CN102057468B (zh) | 2013-01-16 |
US10854443B2 (en) | 2020-12-01 |
US20110031326A1 (en) | 2011-02-10 |
KR101277338B1 (ko) | 2013-06-20 |
KR20120026628A (ko) | 2012-03-19 |
US20200286729A1 (en) | 2020-09-10 |
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