WO2013061950A1 - 液処理装置および液処理方法 - Google Patents
液処理装置および液処理方法 Download PDFInfo
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- WO2013061950A1 WO2013061950A1 PCT/JP2012/077317 JP2012077317W WO2013061950A1 WO 2013061950 A1 WO2013061950 A1 WO 2013061950A1 JP 2012077317 W JP2012077317 W JP 2012077317W WO 2013061950 A1 WO2013061950 A1 WO 2013061950A1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/6715—Apparatus for applying a liquid, a resin, an ink or the like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
- B05B15/80—Arrangements in which the spray area is not enclosed, e.g. spray tables
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
- B05B3/18—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with elements moving in a straight line, e.g. along a track; Mobile sprinklers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
- B05C11/1039—Recovery of excess liquid or other fluent material; Controlling means therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
- B05C11/1044—Apparatus or installations for supplying liquid or other fluent material to several applying apparatus or several dispensing outlets, e.g. to several extrusion nozzles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
- B05C9/06—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying two different liquids or other fluent materials, or the same liquid or other fluent material twice, to the same side of the work
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B17/00—Wheels characterised by rail-engaging elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B17/00—Wheels characterised by rail-engaging elements
- B60B17/0065—Flange details
- B60B17/0068—Flange details the flange being provided on a single side
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
- B61H5/00—Applications or arrangements of brakes with substantially radial braking surfaces pressed together in axial direction, e.g. disc brakes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/30—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces
- G01B11/306—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces for measuring evenness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/20—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring contours or curvatures, e.g. determining profile
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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
- H01L21/02043—Cleaning before device manufacture, i.e. Begin-Of-Line process
- H01L21/02052—Wet cleaning only
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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
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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
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02225—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer
- H01L21/0226—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process
- H01L21/02282—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process liquid deposition, e.g. spin-coating, sol-gel techniques, spray coating
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67017—Apparatus for fluid treatment
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67017—Apparatus for fluid treatment
- H01L21/67028—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like
- H01L21/6704—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like for wet cleaning or washing
- H01L21/67051—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like for wet cleaning or washing using mainly spraying means, e.g. nozzles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B2900/00—Purpose of invention
- B60B2900/30—Increase in
- B60B2900/325—Reliability
Definitions
- the present invention relates to a liquid processing apparatus and a liquid processing method for performing liquid processing such as cleaning processing and etching processing on a substrate.
- a resist film is formed in a predetermined pattern on a processing target film formed on a substrate such as a semiconductor wafer (hereinafter also simply referred to as “wafer”), and etching is performed using this resist film as a mask. Processing such as ion implantation is applied to the processing target film. After the processing, the resist film that has become unnecessary is removed from the wafer.
- a substrate such as a semiconductor wafer (hereinafter also simply referred to as “wafer”)
- SPM treatment is often used as a method for removing a resist film.
- the SPM treatment is performed by supplying an SPM (Sulfuric Acid Hydrogen Peroxide Mixture) solution obtained by mixing sulfuric acid and hydrogen peroxide solution to the resist film.
- SPM sulfuric Acid Hydrogen Peroxide Mixture
- the SPM process is generally performed by supplying an SPM solution from a chemical solution nozzle to a wafer held and rotated horizontally by a substrate holder.
- a high-temperature SPM liquid is discharged toward the wafer, so that fume including SPM liquid and vapor and mist of a reaction product of the SPM liquid and the resist is generated.
- a member surrounding the space in the vicinity of the wafer is provided. For example, in an apparatus described in Japanese Patent Application Laid-Open No.
- a splash guard (hereinafter also referred to as “cup” in the present specification) that receives a processing liquid is used to surround the periphery of the wafer.
- a shielding plate (hereinafter also referred to as “top plate” in the present specification) is disposed above the surface (surface to be processed) of the wafer, thereby preventing fume scattering.
- the present invention prevents cross-contamination while preventing or suppressing leakage of the atmosphere derived from the processing liquid around the substrate when performing different types of liquid processing in one liquid processing apparatus.
- the present invention provides a technique capable of providing a liquid processing apparatus that can perform the above processing.
- the present invention includes a substrate holder that horizontally holds and rotates a substrate, a first processing liquid supply nozzle that supplies a first processing liquid to the substrate held by the substrate holder, and the substrate holder.
- a second processing liquid supply nozzle for supplying a second processing liquid to the substrate held on the substrate and a radial periphery of the substrate held by the substrate holding portion so that the upper end is positioned above the substrate.
- a liquid receiving cup for receiving the processing liquid after being supplied to the substrate by the first processing liquid supply nozzle or the second processing liquid supply nozzle, and an upper end of the liquid receiving cup.
- a cylindrical first cylindrical outer cup having an upper opening formed in the upper portion, which is movable up and down between a raised position above the cup and a lowered position located below the raised position; and the liquid receiver A first outer cylindrical cup around the cup; A cylindrical shape with an upper opening formed in the upper part, which is movable up and down between an ascending position whose upper end is above the cup and a descending position located below the ascending position.
- a liquid processing apparatus including a second cylindrical outer cup is provided.
- this invention is a liquid processing method using said liquid processing apparatus, Comprising: With the said 1st cylindrical outer cup located in a raise position, and the said 2nd cylindrical outer cup located in a lowered position A first liquid processing step of rotating the substrate held by the substrate holding unit to supply the first processing liquid from the first nozzle to the substrate and performing a first liquid processing on the substrate; The second cylindrical outer cup is positioned at the raised position and the substrate held by the substrate holding portion is rotated with the first cylindrical outer cup positioned at the lowered position. And a second liquid processing step of supplying the second processing liquid to the substrate and performing the second liquid processing on the substrate.
- the first cylindrical outer cup and the second cylindrical outer cup are disposed above the substrate during the liquid processing using the first processing liquid and during the liquid processing using the second processing liquid, respectively.
- the atmosphere derived from the treatment liquid in the space is prevented from diffusing radially outward. Then, by using the first cylindrical outer cup and the second cylindrical outer cup exclusively during the liquid processing using the first processing liquid and during the liquid processing using the second processing liquid, cross contamination Can be prevented.
- FIG. 3 is a top view of the liquid processing apparatus shown in FIG.
- FIG. 3 is a top view of the liquid processing apparatus shown in FIG.
- a liquid processing system including a liquid processing apparatus 10 according to an embodiment will be described with reference to FIG.
- a liquid processing system includes a mounting table 101 for mounting a carrier containing a substrate, for example, a semiconductor wafer W (hereinafter also abbreviated as “wafer W”), and a carrier from the outside of the system.
- a transfer arm 102 for taking out the wafer W accommodated in the wafer a transfer unit 103 for placing the wafer W taken out by the transfer arm 102, and the wafer W placed on the transfer unit 103,
- a transfer arm 104 for transferring W into the liquid processing apparatus 10.
- a plurality (four in the illustrated embodiment) of liquid processing apparatuses 10 are provided in the liquid processing system.
- the liquid processing apparatus 10 includes a processing chamber 20 in which liquid processing is performed on a wafer W accommodated therein, and a standby area 80 formed adjacent to the processing chamber 20. Yes.
- the processing chamber 20 and the standby area 80 are in communication.
- a substrate holder 21 that holds and rotates the wafer W in a horizontal state is provided in the processing chamber 20, and a ring-shaped rotary cup 40 is provided around the substrate holder 21. Is arranged.
- the rotating cup 40 is provided to receive a processing liquid that scatters from the wafer W due to centrifugal force when the wafer W is subjected to the liquid processing. Also, as shown in FIGS.
- a cylindrical outer cup is doubled around the rotating cup 40 in the processing chamber 20, and the cylindrical outer cup 50A formed in a cylindrical shape and A cylindrical outer cup 50B is disposed concentrically outside the cylindrical outer cup 50A.
- These cylindrical outer cups 50 ⁇ / b> A and 50 ⁇ / b> B can be moved up and down independently according to the processing applied to the wafer W. Details of the configuration of the substrate holding portion 21, the rotating cup 40, and the cylindrical outer cups 50A and 50B will be described later.
- a plurality of (four in the illustrated example) nozzle support arms 82 are provided in one liquid processing apparatus 10, and the tip of each nozzle support arm 82 is provided.
- 1 nozzle 82a (or two nozzles 82a and 82a ′ (see also FIG. 8)).
- Each nozzle support arm has an elongated rod shape as a whole, more specifically, an elongated cylindrical shape. In FIG. 2, only one of the plurality of nozzle support arms 82 is shown.
- each nozzle support arm 82 is provided with an arm support portion 82b (not shown in FIG.
- each arm support portion 82b is a linear drive mechanism schematically indicated by a broken line.
- 82c (not shown in FIG. 3) is linearly driven in the longitudinal direction (left-right direction in FIG. 2) of the nozzle support arm 82.
- the configuration of the linear drive mechanism 82c is arbitrary.
- the arm support portion 82b is slidably moved along a guide rail (not shown), and pulleys (not shown) provided at both ends of the guide rail, respectively.
- the arm support portion 82b is fixed to a belt (not shown) spanned between them, and the arm support portion 82b can be moved by driving the belt.
- Each nozzle support arm 82 passes through a side opening 50m formed in a side portion of the corresponding cylindrical outer cup (50A or 50B), and inside the cylindrical outer cup (50A or 50B).
- the nozzle support arm 82 linearly moves in the horizontal direction between the advanced position where the distal end has advanced and the retracted position where the distal end of the nozzle support arm 82 is retracted from the cylindrical outer cup 50 (each nozzle support arm 82 in FIGS. 2 and 3). See the arrow near it).
- a top plate 32 for covering the wafer W held on the substrate holding unit 21 from above is provided so as to be movable in the horizontal direction.
- the top plate 32 is retracted from the advanced position in the horizontal direction as shown by a two-dot chain line in FIG. 4 and the advanced position that covers the wafer W held by the substrate holding unit 21 from above as shown by a solid line in FIG. It is possible to move between the retracted position which is the position. Details of the configuration of the top plate 32 and its peripheral parts will be described later.
- an air hood 70 for covering the wafer W held by the substrate holding unit 21 from above is provided so as to be movable up and down.
- a purified gas such as N 2 gas (nitrogen gas) or clean air is flowed downward from the air hood 70.
- the air hood 70 is provided so as to be movable up and down between a lowered position that covers the wafer W held by the substrate holder 21 from above and a raised position that is located above the lowered position.
- FIG. 2 shows a state when the air hood 70 is located at the raised position.
- the air hood 70 covers the wafer from above even in the raised position. Details of the configuration of the air hood 70 will be described later.
- an exhaust part 58 is provided at the bottom of the standby area 80, and the exhaust part 58 exhausts the atmosphere in the standby area 80. Particles generated from the linear drive mechanism 82 c for driving each nozzle support arm 82 are sucked and removed by the exhaust unit 58.
- shutters 60 and 62 are provided in the opening provided in the area of the processing chamber 20 of the housing of the liquid processing apparatus 10 and the opening in the standby region 80, respectively. By opening 62, the equipment in the processing chamber 20 and the standby area 80 can be accessed and maintained.
- the shutters 60 and 62 are provided on the opposite side of an opening 94 a (to be described later) for carrying the wafer W in and out of the processing chamber 20 by the transfer arm 104.
- an opening 94 a for carrying the wafer W into the processing chamber 20 by the transfer arm 104 and unloading the wafer W from the processing chamber 20 is provided on the side wall of the housing of the liquid processing apparatus 10.
- the opening 94a is provided with a shutter 94 for opening and closing the opening 94a.
- FIG. 5 is a longitudinal cross-sectional view showing the substrate holding unit 21 and the components located in the vicinity thereof among the respective components of the liquid processing apparatus 10.
- the substrate holding unit 21 includes a disk-shaped holding plate 26 for holding the wafer W, and a disk-shaped lift pin plate 22 provided above the holding plate 26. .
- Three lift pins 23 for supporting the wafer W from below are provided on the upper surface of the lift pin plate 22 at equal intervals in the circumferential direction. Note that only two lift pins 23 are shown in FIG.
- a piston mechanism 24 is provided below the lift pin plate 22, and the lift pin plate 22 is moved up and down by the piston mechanism 24.
- the lift pin plate 22 is moved upward from a position as shown so that the lift pin plate 22 is positioned above the rotary cup 40. On the other hand, when liquid processing or drying processing of the wafer W is performed in the processing chamber 20, the lift pin plate 22 is moved to the lowered position as shown in FIG. 40 is located.
- the holding plate 26 is provided with three holding members 25 for holding the wafer W from the side at equal intervals in the circumferential direction. Note that only two holding members 25 are shown in FIG. Each holding member 25 holds the wafer W on the lift pins 23 from the side when the lift pin plate 22 moves from the raised position to the lowered position as shown in FIG. 5, and slightly lifts the wafer W when held. Thus, it is configured to be slightly separated from the lift pin 23.
- a processing liquid supply pipe 28 is provided so as to pass through these through holes.
- the processing liquid supply pipe 28 supplies various types of processing liquid such as chemical liquid and pure water to the back surface of the wafer W held by each holding member 25 of the holding plate 26.
- the processing liquid supply pipe 28 is moved up and down in conjunction with the lift pin plate 22.
- a head portion 28 a is provided at the upper end of the processing liquid supply pipe 28 so as to close the through hole of the lift pin plate 22.
- a processing liquid supply unit 29 is connected to the processing liquid supply pipe 28, and various types of processing liquids are supplied to the processing liquid supply pipe 28 by the processing liquid supply unit 29. .
- the ring-shaped rotating cup 40 is attached to the holding plate 26 via a connecting portion (not shown), so that the rotating cup 40 rotates integrally with the holding plate 26.
- the rotary cup 40 is provided so as to surround the wafer W supported by each holding member 25 of the holding plate 26 from the side. For this reason, the rotating cup 40 can receive the processing liquid scattered laterally from the wafer W when the wafer W is subjected to the liquid processing.
- the holding plate 26 rotates by rotating a rotary shaft 26 a extending downward from the holding plate 26 by a rotary drive motor 27. At this time, the lift pin plate 22 in the lowered position is engaged with the holding plate 26 via the pin 24a, and thus rotates together with the lift pin plate 22.
- a drain cup 42 and a guide cup 44 are provided around the rotating cup 40.
- the drain cup 42 and the guide cup 44 are each formed in a ring shape.
- the drain cup 42 and the guide cup 44 each have an opening at the top.
- the drain cup 42 is fixed so that the upper end of the drain cup 42 is higher than the substrate held by the holding member 25 in the processing chamber 20.
- the guide cup 44 is movably provided in the drain cup 42 and can be moved up and down by a lift cylinder (not shown).
- a first discharge part 46a and a second discharge part 46b are provided below the drain cup 42 and the guide cup 44, respectively.
- the processing liquid splashed laterally from the wafer W is one of the two discharge portions 46a and 46b.
- the guide cup 44 is positioned at the raised position (the state shown in FIG. 5), and the SC scattered from the wafer W to the side. -1 liquid is sent to the second discharge part 46b.
- the guide cup 44 is positioned at the lowered position, and the SPM liquid scattered from the wafer W to the side is sent to the first discharge unit 46a.
- gas-liquid separators 48a and 48b are connected to the first discharge part 46a and the second discharge part 46b, respectively.
- the first discharge unit 46a and the second discharge unit 46b perform not only drainage but also exhaustion. As shown in FIG.
- the first discharge unit 46a and the second discharge unit 46b are separated from the gas-liquid mixed fluid consisting of the waste liquid (including mist) and gas of the processing liquid sent from the second discharge part 46b, and discharged (DR) and exhausted (EXH), respectively.
- the drain cup 42 is provided with a fixed rinse nozzle 43 for supplying pure water toward the center of the wafer W.
- the fixed rinsing nozzle 43 discharges a rinsing liquid such as pure water in a parabolic shape toward the center of the wafer W (see a two-dot chain line in FIG. 5).
- the cylindrical outer cups 50 ⁇ / b> A and 50 ⁇ / b> B described above are provided around the drain cup 42 and the guide cup 44.
- a support member 53A that supports the cylindrical outer cup 50A is connected to the lower end of the inner cylindrical outer cup 50A, and the support member 53A is moved up and down by the drive mechanism 54A.
- the drive mechanism 54A and the support member 53A can be configured by, for example, a cylinder portion and a rod portion of an air cylinder mechanism, respectively.
- two side openings 50m are provided in the side portion of the cylindrical outer cup 50A to allow the nozzle support arms 82p and 82q to pass therethrough.
- the upper part of the cylindrical outer cup 50A is an open end, in other words, an upper opening 50n is formed in the upper part of the cylindrical outer cup 50A.
- the cylindrical outer cup 50A rises to a position where the upper opening 50n is blocked by the top plate 32.
- a support member 53B for supporting the cylindrical outer cup 50B is connected to the upper portion of the outer cylindrical outer cup 50B, and a driving mechanism 54B for raising and lowering the support member 53B is connected to the support member 53B. It is connected.
- the drive mechanism 54B can be constituted by an air cylinder mechanism, for example.
- the side portion of the cylindrical outer cup 50B is also provided with two side openings (same shape as the side opening 50m of the cylindrical outer cup 50A) for passing the nozzle support arms 82r and 82s. This is not shown. Similar to the cylindrical outer cup 50A, an upper opening is formed at the upper part of the cylindrical outer cup 50B. The upper outer opening 50B is in the raised position, and the air hood 70 is in the lowered position. The air hood 70 closes the air hood.
- cleaning portions 52A and 52B for cleaning the cylindrical outer cups 50A and 50B are provided in the processing chamber 20, respectively.
- Each of the cleaning units 52A and 52B has ring-shaped cleaning tanks 52Aa and 52Ba for storing a cleaning liquid such as DIW (pure water).
- DIW pure water
- the cylindrical outer cups 50A, 50B are immersed in the cleaning liquid stored in the cleaning tanks 52Aa, 52Ba, thereby cleaning the cylindrical outer cups 50A, 50B.
- An appropriate seal (not shown) between the bottom wall of the cleaning tank 52Aa and the support member 53A penetrating therethrough (see the left side of FIG.
- Cleaning liquid supply paths 52Ab and 52Bb are formed at the bottoms of the cleaning tanks 52Aa and 52Ba (see the right side of FIG. 5), and the cleaning liquid supply paths 52Ab and 52Bb are schematically shown by arrows in FIG.
- the cleaning liquid is continuously sent from the supply source (DIW).
- the drainage passages 52Ac and 52Bc are opened in the upper side portions of the washing tanks 52Aa and 52Ba (see the left side of FIG. 5), and the washing tanks 52Aa and 52Ba are disposed through the drainage paths 52Ac and 52Bc.
- the cleaning liquid is discharged.
- one arm cleaning unit 88 is provided for each nozzle support arm 82 to clean each nozzle support arm 82 just outside the cylindrical outer cup 50 ⁇ / b> B. Yes.
- the arm cleaning unit 88 has a cleaning chamber (not shown) in which a cleaning liquid is accommodated.
- An elongated cylindrical nozzle support arm 82 passes therethrough.
- the arm cleaning unit 88 may be configured by providing a nozzle for injecting a shower of cleaning liquid in the cleaning chamber, and a gas nozzle for injecting a gas for drying the cleaning liquid is attached to the arm cleaning unit 88. You can also In FIG. 3, the arm cleaning unit 88 is not shown for simplification of the drawing.
- the SPM liquid obtained by mixing sulfuric acid and hydrogen peroxide solution is discharged downward toward the wafer W.
- a treatment liquid supply pipe 83a connected to the nozzle 82a is provided in the first nozzle support arm 82p, and a hydrogen peroxide solution supply part 83b and a sulfuric acid supply part 83c provided in parallel are respectively provided with a flow rate adjustment valve and It is connected to the processing liquid supply pipe 83a through an on-off valve.
- a heater 83d for heating the sulfuric acid supplied from the sulfuric acid supply unit 83c is provided. Then, the hydrogen peroxide solution and the sulfuric acid supplied from the hydrogen peroxide solution supply unit 83b and the sulfuric acid supply unit 83c are mixed, and the SPM solution obtained by mixing this sulfuric acid and the hydrogen peroxide solution is treated liquid supply pipe 83a. Is sent to the nozzle 82a of the first nozzle support arm 82p. The sulfuric acid supplied from the sulfuric acid supply unit 83c is heated by the heater 83d, and further, reaction heat is generated when the heated sulfuric acid and the hydrogen peroxide solution are mixed.
- the SPM liquid discharged from the nozzle 82a of the first nozzle support arm 82p has a high temperature of 100 ° C. or higher, for example, about 170 ° C.
- hot DIW heatated pure water
- a treatment liquid supply pipe 83a ′ connected to the nozzle 82a ′ is provided in the first nozzle support arm 82p, and the pure water supply part 83e is provided with a treatment liquid supply pipe 83a ′ via a flow rate adjustment valve and an on-off valve. It is connected to the.
- a heater 83f for heating pure water supplied from the pure water supply unit 83e to, for example, 60 to 80 ° C. is provided.
- a top plate cleaning solution such as pure water for cleaning the top plate 32 is discharged upward from the nozzle 82a of the second nozzle support arm 82q. Yes.
- a cleaning liquid supply pipe 84a connected to the nozzle 82a is provided in the second nozzle support arm 82q, and a cleaning liquid supply part 84b is connected to the cleaning liquid supply pipe 84a via a flow rate adjusting valve and an on-off valve.
- a top plate cleaning liquid such as pure water supplied from the cleaning liquid supply unit 84b is sent to the nozzle 82a of the second nozzle support arm 82q through the cleaning liquid supply pipe 84a.
- a mixed solution of ammonia water and hydrogen peroxide solution (hereinafter also referred to as “SC-1 solution”), Pure water as a room temperature rinsing liquid can be discharged downward toward the wafer W.
- a treatment liquid supply pipe 85a connected to the nozzle 82a is provided in the third nozzle support arm 82r.
- the hydrogen peroxide solution supply unit 85b, the ammonia solution supply unit 85c, and the pure water supply unit are provided in parallel.
- 85d is connected to the processing liquid supply pipe 85a through a flow rate adjusting valve and an on-off valve, respectively.
- the hydrogen peroxide solution supply unit 85b and the ammonia water supply are supplied with the on-off valve corresponding to the pure water supply unit 85d closed. Hydrogen peroxide water and ammonia water are sent out from the portion 85c and mixed to produce SC-1 liquid, which is supplied to the nozzle of the third nozzle support arm 82r via the processing liquid supply pipe 85a. 82a.
- the processing liquid is supplied from the pure water supply unit 85d with the on-off valves corresponding to the hydrogen peroxide solution supply unit 85b and the ammonia water supply unit 85c closed. Pure water is sent out through the pipe 85a.
- the nozzle 82a of the fourth nozzle support arm 82s is configured as a two-fluid nozzle.
- a pure water supply pipe 86a and an N2 gas supply pipe 86c are connected to the nozzle 82a of the fourth nozzle support arm 82s, respectively, and a pure water supply section 86b is connected to the pure water supply pipe 86a and an N2 gas supply is performed.
- An N2 gas supply unit 86d is connected to the pipe 86c. Pure water supplied from the pure water supply part 86b via the pure water supply pipe 86a and N2 gas supplied from the N2 gas supply part 86d via the N2 gas supply pipe 86c are mixed in the two-fluid nozzle. Thus, a droplet of pure water is sprayed downward from the two-fluid nozzle.
- the height level of the second nozzle support arm 82q may be higher than the height level of the first nozzle support arm 82p, and in this case, the second nozzle support arm 82q and the third nozzle It is possible to prevent the arms from colliding or interfering with each other when the support arm 82r advances into the cylindrical outer cup 50 at the same time. As a result, when the high temperature rinsing process is performed on the wafer W by the nozzle 82a of the first nozzle support arm 82p, the top plate 32 can be cleaned by the nozzle 82a of the second nozzle support arm 82q.
- the substrate holder 21 from which the wafer W has been removed can be cleaned.
- the height level of the two side openings 50m formed in the inner cylindrical outer cup 50A is also changed.
- each nozzle support arm 82 When each nozzle support arm 82 is in the retracted position, the tip end portion of the nozzle support arm 82 is close to the corresponding side opening 50m of the cylindrical outer cup 50 when it is in the raised position. It is supposed to close. Accordingly, it is possible to further prevent the atmosphere inside the cylindrical outer cup 50 from leaking from the side opening 50m to the outside of the cylindrical outer cup 50.
- top plate 32 Next, the detailed structure of the top plate 32 and the components located in the vicinity thereof will be described with reference to FIGS. 4, 6A and 6B.
- the top plate 32 is held by a top plate holding arm 35.
- a rotating shaft 34 is attached to the top of the top plate 32, and a bearing 34 a is provided between the rotating shaft 34 and the top plate holding arm 35. For this reason, the rotation shaft 34 can be rotated with respect to the top plate holding arm 35.
- a pulley 34 b is attached to the rotating shaft 34.
- a servo motor 36 is provided at the base end of the top plate holding arm 35, and a pulley 36 b is also provided at the tip of the servo motor 36.
- An endless timing belt 36a is stretched around the pulley 34b of the rotating shaft 34 and the pulley 36b of the servo motor 36, and the rotational driving force by the servo motor 36 is transmitted to the rotating shaft 34 by this timing belt 36a.
- the top plate 32 rotates about the rotation shaft 34.
- a cable 36 c is connected to the servo motor 36, and power is supplied to the servo motor 36 from the outside of the casing of the liquid processing apparatus 10 by this cable 36 c.
- the rotary shaft 34, the timing belt 36a, the servo motor 36, and the like constitute a top plate rotating mechanism that rotates the top plate 32 on a horizontal plane.
- a ring-shaped liquid receiving member 130 Adjacent to the periphery of the top plate 32, a ring-shaped liquid receiving member 130 is provided for receiving liquid (for example, fume condensate) that adheres to the back surface of the top plate 32 and then scatters radially outward by centrifugal force. ing.
- the liquid receiving member 130 has a ring-shaped liquid receiving space 132 therein, and the liquid receiving space 132 is opened toward the periphery of the top plate 32.
- the liquid receiving member 130 has an upwardly extending edge member 134 that forms the inner peripheral end of the liquid receiving space 132.
- the liquid receiving member 130 is designed to ensure that the liquid scattered from the top plate 32 falls into the liquid receiving space 132. It is preferable that the peripheral edge of the plate 32 is located radially outside the edge member 134.
- the liquid receiving member 130 is formed with one or more discharge ports 136 connected to the liquid receiving space 132.
- the discharge port 136 is connected to a discharge pipe 137c in which a mist separator 137a and an ejector 137b are interposed, so that the inside of the liquid receiving space 132 can be sucked as necessary.
- the liquid in the liquid receiving space 132 can be efficiently discharged to the discharge pipe 137c.
- an air flow is generated in the liquid receiving space 132 in the vicinity of the lower surface of the peripheral portion of the top plate 32, and the liquid that has reached the peripheral portion of the top plate 32 by this air flow is liquid receiving space 132.
- the liquid can be reliably guided into the liquid receiving space 132.
- the liquid separated by the mist separator 137a is discharged to the factory waste liquid system (DR), and the exhaust from the ejector 137b is exhausted to the factory exhaust system (EXH).
- the discharge port 136 is preferably provided below the top plate holding arm 35 (see FIG. 4) in order to simplify the handling of the discharge pipe 137c.
- a circular rectifying plate 140 that cannot be rotated is provided above the rotatable top plate 32.
- a space 141 is provided between the upper surface of the top plate 32 and the lower surface of the rectifying plate 140.
- the peripheral edge of the lower surface of the rectifying plate 140 is connected to the inner upper surface 138 that defines the liquid receiving space 132 of the liquid receiving member 130. Accordingly, when the liquid receiving space 132 is sucked by the ejector 137b, an airflow that flows outward in the radial direction in the space 141 between the top plate 32 and the rectifying plate 140 is generated.
- the liquid flows into the liquid receiving space 132 through the gap between the inner upper surface 138 of the receiving member 130, the liquid flows into the liquid receiving space 132 through between the peripheral edge of the top plate 32 and the edge member 134 of the liquid receiving member 130.
- the air does not blow out above the top plate 32 through the gap between the peripheral edge of the top plate 32 and the inner upper surface 138 of the liquid receiving member 130.
- the liquid receiving member 130 and the rectifying plate 140 are supported by a plurality of (four in this example) support arms 146 that are fixed to the top plate holding arm 35 and extend radially from the top plate holding arm 35.
- the attachment ring 150, the outer peripheral edge portion 144 of the rectifying plate 140, and the liquid receiving member 130 are laminated in this order from the top on the lower surface of the distal end portion of the support arm 146, and are fastened to each other by bolts 148a.
- the inner peripheral edge 142 of the rectifying plate 140 is fastened to the lower surface of the base end portion of the support arm 146 by a bolt 148b.
- the top plate 32, the liquid receiving member 130 and the rectifying plate 140 are supported by the top plate holding arm 35 which is a common support member and move together, and the top plate Only 32 can rotate around the vertical axis, and the liquid receiving member 130 and the current plate 140 do not rotate.
- the lower surface of the liquid receiving member 130 contacts the upper surface of the inner cylindrical outer cup 50A. Or close so that there is a slight gap between them so that leakage does not occur.
- the cylindrical outer cup 50A, the liquid receiving member 130 and the top plate 32 surround the wafer W.
- a closed space is defined.
- a seal member may be provided on at least one of the lower surface of the liquid receiving member 130 and the upper surface of the cylindrical outer cup 50 to seal between the lower surface of the liquid receiving member 130 and the upper surface of the cylindrical outer cup 50A.
- a rotation motor 37 is provided at the base end of the top plate holding arm 35, and the top plate holding arm 35 turns around the rotation axis of the rotation motor 37. Yes. Thereby, the top plate 32 moves from the upper position where the wafer W held by the substrate holding unit 21 is covered (a position indicated by a solid line in FIG. 4), and the retracted position (the figure is a position retracted horizontally from the advanced position). 4) (position indicated by a two-dot chain line).
- the standby area 80 of the liquid processing apparatus 10 is provided with a top plate storage portion 38 that stores the top plate 32 when the top plate 32 is retracted to the retracted position. Yes.
- An opening is formed on the side of the top plate storage portion 38, and when the top plate 32 moves from the advanced position to the retracted position, the top plate 32 passes through the opening on the side of the top plate storage portion 38. It is completely stored in the top plate storage section 38.
- the top plate storage unit 38 is provided with an exhaust unit 39, and the atmosphere in the top plate storage unit 38 is always exhausted by the exhaust unit 39.
- the air hood 70 includes a casing 72 having a lower opening, and a lower plate 77 such as a punching plate provided at a lower portion of the casing 72 and having a plurality of openings 77 a.
- the filter 76 is provided with one layer or a plurality of layers.
- a flexible duct 74 is connected to the upper portion of the casing 72, and this duct 74 communicates with the environment outside the casing of the liquid processing apparatus 10.
- a fan (not shown) for sending gas into the casing 72 is provided at the base end of the duct 74.
- gas for example, air
- the filter 76 in the casing 72 After gas (for example, air) is sent into the casing 72 via the duct 74 from the environment outside the housing of the liquid processing apparatus 10, particles contained in the gas are removed by the filter 76 in the casing 72, and then The cleaned gas flows downward from the opening 77a of the plate 77.
- gas for example, air
- the air hood 70 is provided with an air hood elevating mechanism 78 that elevates and lowers the air hood 70.
- the air hood 70 is positioned in the vicinity of the wafer W held by the substrate holding unit 21 and covers the wafer W from above, and further away from the wafer W than the lowered position. It moves up and down between the raised positions.
- FIG. 2 shows a state where the air hood 70 is located at the raised position. When the air hood 70 is in the lowered position and the outer cylindrical outer cup 50B is in the raised position, the upper surface of the outer cylindrical outer cup 50B is in contact with the lower surface of the lower plate 77 of the air hood 70 or leaks.
- the wafer W is placed close to each other so that a slight gap is not present between the two, so that the wafer W is sealed around the wafer W by the air hood 70 and the cylindrical outer cup 50B.
- a closed space is defined (see FIGS. 7, 10 (i) to (j) and FIG. 11 (k)).
- the air hood 70 moves up and down between the raised position and the lowered position, and the top plate 32 moves horizontally between the advanced position and the retracted position.
- the air hood 70 may move horizontally between the advanced position and the retracted position, and the top board 32 may be moved up and down between the raised position and the lowered position.
- the liquid processing apparatus 10 has a controller 200 that controls the overall operation of the liquid processing apparatus 10.
- the controller 200 rotates all the functional components of the liquid processing apparatus 10 (for example, the substrate holding unit 21, the piston mechanism 24, the servo motor 36, the drive mechanisms 54A and 54B of the cylindrical outer cups 50A and 50B, and the top plate 32).
- the operation of the motor 37, the air hood elevating mechanism 78, etc.) is controlled.
- the controller 200 can be realized by, for example, a general-purpose computer as hardware and a program (such as an apparatus control program and a processing recipe) for operating the computer as software.
- the software is stored in a storage medium such as a hard disk drive that is fixedly provided in the computer, or is stored in a storage medium that is detachably set in the computer such as a CD-ROM, DVD, or flash memory.
- a storage medium is indicated by reference numeral 201 in FIG.
- the processor 202 calls a predetermined processing recipe from the storage medium 201 based on an instruction from a user interface (not shown) or the like as necessary, and executes each processing component of the liquid processing apparatus 10 under the control of the controller 200. It operates to perform a predetermined process.
- the controller 200 may be a system controller that controls the entire liquid processing system shown in FIG.
- FIGS. 9 to 11 the components of the liquid processing apparatus are greatly simplified for the sake of easy viewing.
- the top plate 32 is moved to the retracted position, and the top plate 32 is stored in the top plate storage unit 38. Further, the air hood 70 is lowered from the raised position shown in FIG. 2 and is located at the lowered position. Further, the inner and outer cylindrical outer cups 50A and 50B are positioned at the lowered position, and the side of the upper space of the substrate holding part 21 is opened. In this state, the lift pin plate 22 and the processing liquid supply pipe 28 of the substrate holding unit 21 are moved upward from the position shown in FIG. 5 to open the shutter 94 provided in the opening 94a of the processing chamber 20.
- the wafer W is transferred from the outside of the liquid processing apparatus 10 into the processing chamber 20 through the opening 94a by the transfer arm 104 (see FIG. 1), and the wafer W is placed on the lift pins 23 of the lift pin plate 22. Thereafter, the transfer arm 104 is retracted from the processing chamber 20. At this time, each nozzle support arm 82 is located at a retracted position in the standby area 80.
- the cleanliness in the processing chamber 20 is maintained by constantly sending a gas such as clean air from the air hood 70 into the processing chamber 20 in a downflow.
- each holding member 25 provided on the holding plate 26 supports the wafer W on the lift pins 23 from the side, and slightly separates the wafer W from the lift pins 23.
- the air hood 70 is moved from the lowered position to the raised position, and then the top board 32 is moved from the retracted position to the advanced position.
- the wafer W held by the substrate holder 21 is covered with the top plate 32.
- the inner cylindrical outer cup 50A is raised from the lowered position to the raised position.
- a space isolated from the outside by the top plate 32 and the cylindrical outer cup 50A is formed around the wafer W.
- This space is also referred to as “first processing space” in the following description.
- the first processing space is a space in which liquid processing is performed on the wafer W with an SPM liquid obtained by mixing sulfuric acid and hydrogen peroxide solution.
- FIG. 6B the positional relationship between the upper end of the cylindrical outer cup 50A, the top plate 32, and its peripheral components at this time is as shown in FIG. 6B (FIGS. 9D to 9E and FIG. 11). The same applies to the state shown in m).
- the cylindrical outer cup 50A When the cylindrical outer cup 50A is in the raised position, the lower end portion of the cylindrical outer cup 50A is immersed in the cleaning liquid in the cleaning tank 52Aa. As a result, a water seal is formed that blocks communication between the inner space and the outer space of the cylindrical outer cup 50A via the space near the lower end of the cylindrical outer cup 50A.
- the first nozzle support arm 82p enters the inside of the processing chamber 20 through the corresponding side opening 50m of the cylindrical outer cup 50. (See FIG. 9 (d)).
- the holding plate 26 and the lift pin plate 22 of the substrate holding unit 21 are rotated, and the wafer W held by each holding member 25 of the holding plate 26 is rotated.
- the SPM liquid is supplied to the upper surface of the wafer W from the nozzle 82a of the first nozzle support arm 82p that has advanced into the cylindrical outer cup 50A, and the SPM processing of the wafer W is performed.
- the resist on the surface of the wafer W is peeled off by the SPM liquid.
- the resist peeled off together with the SPM liquid is scattered from the wafer W by the centrifugal force of the rotating wafer W, sent to the first discharge portion 46a via the guide cup 44 at the lowered position, and collected.
- the nozzle 82a is moved in the left-right direction in FIG. 9D while discharging the SPM liquid from the nozzle 82a of the first nozzle support arm 82p toward the wafer W. It is preferable to uniformly discharge the SPM liquid.
- the atmosphere in the first process space can be prevented from going outside, and the outside atmosphere can be prevented from entering the first processing space.
- the top plate 32 rotates along the horizontal plane, the droplets of the treatment liquid such as the SPM liquid adhering to the lower surface of the top plate 32 flow toward the periphery of the top plate 32 by centrifugal force, and the liquid receiver The liquid flows into the liquid receiving space 132 of the member 130, and is further discharged from the liquid receiving space 132 to a factory drainage system through a discharge pipe 137c in which a discharge port 136, a mist separator 137a and an ejector 137b are interposed.
- the droplet of the treatment liquid adhering to the inner wall surface of the cylindrical outer cup 50 falls along its inner wall surface by the dead weight along the inner wall surface of the cylindrical outer cup 50A. Accordingly, it is possible to prevent the droplets of the processing liquid such as the SPM liquid from reattaching to the wafer W.
- the discharge of the SPM liquid from the nozzle 82a of the first nozzle support arm 82p is finished, and then the first nozzle is continuously rotated while the wafer W and the top plate 32 are continuously rotated.
- a high temperature rinsing process is performed by supplying high temperature DIW (for example, pure water heated to 80 ° C.) from the nozzle 82a ′ of the support arm 82p. At this time, heated pure water is also supplied from the processing liquid supply pipe 28 toward the lower surface (back surface) of the wafer W, and high-temperature rinsing processing is also performed on the wafer back surface.
- DIW for example, pure water heated to 80 ° C.
- the nozzle 82 a ′ may continue to be positioned directly above the rotation center of the wafer W, or may be reciprocated in the radial direction of the wafer W.
- the first nozzle support arm 82p is once retracted and cleaned by the arm cleaning unit 88, and then advanced into the cylindrical outer cup 50A again. Also good.
- the first nozzle support arm 82p After completion of the high temperature rinsing process, the first nozzle support arm 82p is retracted from the cylindrical outer cup 50A and waits in the standby area 80, as shown in FIG. 9 (e). At this time, the wafer W and the top plate 32 continue to rotate. In addition, when the first nozzle support arm 82p is retracted from the cylindrical outer cup 50 and moved to the retracted position, the arm cleaning unit 88 cleans the first nozzle support arm 82p, and the first nozzle Contaminants originating from the SPM process adhering to the support arm 82p are removed.
- the supply of pure water (for example, 80 ° C.) from the fixed rinse nozzle 43 toward the center of the wafer W is started.
- pure water for example, 80 ° C.
- the cylindrical outer cup 50A is lowered to the lowered position and is submerged in the cleaning liquid (pure water) in the cleaning tank 52Aa.
- the cleaning liquid pure water
- the top board 32 is moved from the advanced position to the retracted position, and the top board 32 is stored in the top board storage portion 38. At this time, contaminants (such as fume condensate) derived from the SPM liquid adhere to the lower surface of the top plate 32. However, since the interior of the top plate storage unit 38 is exhausted by the exhaust unit 39, the pollutant atmosphere Does not flow into the standby area 80 or the processing chamber 20.
- the outer cylindrical outer cup 50B is raised to the raised position by the drive mechanism 54B.
- the air hood 70 is lowered from the raised position and is located at the lowered position.
- the upper end of the cylindrical outer cup 50 comes into contact with or is close to the lower surface of the lower plate 77 of the air hood 70, so that the air hood 70 and the cylindrical outer cup 50 ⁇ / b> B surround the wafer W.
- a second processing space isolated from the outside is formed.
- a gas (clean air) cleaned by the air hood 70 is supplied into the second processing space to replace the atmosphere remaining in the processing space.
- the supply of the rinsing liquid from the fixed rinsing nozzle 43 is stopped, and the third nozzle support arm 82r waiting in the standby region 80 passes through the side opening 50m of the outer cylindrical outer cup 50B. It advances to the inside of the outer cup 50B (see FIG. 10 (j)).
- the wafer W is continuously rotated, and the gas cleaned by the air hood 70 is flowing in the second processing space, and the third nozzle support arm 82r that has advanced into the cylindrical outer cup 50B.
- the SC-1 solution is supplied from the nozzle 82a toward the center of the wafer W. Thereby, the resist residue remaining on the surface of the wafer W can be removed.
- the SC-1 solution and the resist residue are sent to the second discharge unit 46b and discharged through the guide cup 44 located at the ascending position.
- the second processing space formed inside the air hood 70 and the outer cylindrical outer cup 50B is isolated from the outside. It is possible to prevent the atmosphere containing the component -1 from going outside, and to prevent the external atmosphere from entering the second processing space. Further, since the second processing space is a closed space, the cleanliness of the second processing space can be maintained with the purified gas.
- the third nozzle support arm 82r is retracted from the cylindrical outer cup 50B and waits in the standby area 80 as shown in FIG. At this time, the wafer W continues to rotate.
- the arm cleaning unit 88 cleans the third nozzle support arm 82r. As a result, dirt such as the SC-1 solution adhering to the third nozzle support arm 82r can be removed. Further, even after the third nozzle support arm 82r is retracted from the cylindrical outer cup 50B, the purified gas continues to flow in the second processing space by the air hood 70.
- the third nozzle support arm 82r advances into the cylindrical outer cup 50B through the side opening 50m of the cylindrical outer cup 50B (that is, again in the state of FIG. 10 (j)).
- pure water at room temperature is supplied from the nozzle 82a of the third nozzle support arm 82r that has advanced into the cylindrical outer cup 50 toward the center of the wafer W.
- room-temperature pure water is supplied from the processing liquid supply pipe 28 toward the lower surface (back surface) of the wafer W.
- the rinsing process is performed on the wafer W.
- the wafer W is dried in the second processing space.
- the fourth nozzle support is performed before the wafer W is dried.
- the wafer W may be rinsed by advancing the arm 82s to the inside of the cylindrical outer cup 50B and spraying droplets of pure water onto the wafer W by the two-fluid nozzle of the fourth nozzle support arm 82s. .
- the gas cleaned by the air hood 70 is in the second processing space. It continues to flow in. Thereafter, by rotating the wafer W at a high speed, the wafer W is dried in the second processing space.
- the outer cylindrical outer cup 50B is lowered from the raised position and is located at the lowered position. The side is opened. Thereafter, the lift pin plate 22 and the processing liquid supply pipe 28 of the substrate holding unit 21 are moved upward from the position shown in FIG. 5 to open the shutter 94 provided in the opening 94 a of the processing chamber 20. Then, the transfer arm 104 enters the processing chamber 20 from the outside of the liquid processing apparatus 10 through the opening 94 a, and the wafer W on the lift pins 23 of the lift pin plate 22 is transferred to the transfer arm 104. Thereafter, the wafer W taken out by the transfer arm 104 is transferred to the outside of the liquid processing apparatus 10. In this way, a series of liquid processing of the wafer W is completed.
- the air hood 70 is moved from the lowered position to the raised position, and then the top plate 32 is moved from the retracted position to the advanced position. Further, after the top plate 32 has moved to the advanced position, the inner cylindrical outer cup 50A is raised from the lowered position to the raised position, and then a rotational driving force is applied to the top plate 32 by the servo motor 36. The top plate 32 is rotated around the rotation axis 34 along the horizontal plane.
- the second nozzle support arm 82q of the four nozzle support arms 82 waiting in the standby region 80 has a side opening on the side surface of the cylindrical outer cup 50A. It advances into the cylindrical outer cup 50A through 50m.
- a top plate cleaning liquid such as pure water is discharged from the nozzle 82a of the second nozzle support arm 82q that has advanced into the cylindrical outer cup 50 toward the top plate 32.
- contaminants such as fume condensate
- the top plate cleaning liquid such as pure water is discharged from the nozzle 82a of the second nozzle support arm 82q toward the top plate 32, and the nozzle 82a is moved in the left-right direction in FIG. Cleaning can be performed uniformly over the entire area of the plate 32.
- the top plate 32 when the top plate 32 is cleaned, a closed space is formed inside the top plate 32 and the cylindrical outer cup 50, so that the nozzle 82a of the second nozzle support arm 82q is formed. It is possible to prevent the top plate cleaning liquid discharged from the outside from coming out of the cylindrical outer cup 50. Also during the top plate cleaning process, as in the SPM processing of the wafer W, the cleaning liquid adhering to the lower surface of the top plate 32 flows toward the periphery of the top plate 32 by centrifugal force, and the liquid receiving member 130 receives the liquid.
- the liquid flows into the space 132, and is further discharged from the liquid receiving space 132 to a factory drainage system through a discharge pipe 137c provided with a discharge port 136, a mist separator 137a, and an ejector 137b. Also, the cleaning liquid droplets adhering to the inner wall surface of the cylindrical outer cup 50 fall along the inner wall surface of the cylindrical outer cup 50 by its own weight.
- the cleaning process of the top plate 32 as described above may be performed every time after the resist film removal process and the wafer W cleaning process on the wafer W, or may be performed periodically. Moreover, the cleaning process of the top plate 32 can be performed in parallel with the hot rinse process of the wafer W.
- the first nozzle support arm 82p and the second nozzle support arm 82q advance into the cylindrical outer cup 50 at the same time. At this time, the height level of the second nozzle support arm 82q is higher than the height level of the first nozzle support arm 82p, and the first nozzle support arm 82p and the second nozzle support arm 82q.
- the cleaning process of the top plate 32 by the nozzle 82a of the second nozzle support arm 82q and the hot rinse process of the wafer W by the nozzle 82a of the first nozzle support arm 82p can be performed simultaneously.
- the cylindrical outer cups 50A and 50B are provided around the rotary cup 40, the drain cup 42, and the guide cup 44, which are liquid receiving cups that receive the processing liquid scattered from the wafer W, and the cylinders are used during liquid processing.
- the cylindrical outer cups 50 ⁇ / b> A and 50 ⁇ / b> B are positioned at the raised position where the upper ends of the outer cups 50 ⁇ / b> A and 50 ⁇ / b> B are located above the rotating cup 40. For this reason, the mist or fume derived from the processing liquid that diffuses from the upper opening of the rotating cup 40 is prevented from diffusing over a wide range in the processing apparatus (particularly in the radial direction outward of the wafer in plan view).
- Two cylindrical outer cups 50A and 50B are used for the first chemical solution processing and the second chemical solution processing, respectively.
- the cylindrical outer cup 50A in which the mist or fume derived from the processing liquid attached to one cylindrical outer cup (for example, 50A) contaminates the processing space formed by the other cylindrical outer cup (for example, 50B), Cross contamination via 50B can be prevented.
- 1st process space is formed using inner cylindrical outer cup 50A, and SPM liquid
- a second treatment space is formed using the outer cylindrical outer cup 50B.
- the inner cylindrical outer cup 50A is submerged in the cleaning liquid stored in the cleaning tank 52Aa when not in use. For this reason, first, when performing the liquid treatment with the SPM liquid, the inner cylindrical outer cup 50A prevents the inner atmosphere from diffusing outward, so that the outer cylindrical outer cup 50B is not contaminated.
- the cylindrical outer cup 50B can be immediately raised to perform the liquid treatment with the SC-1 liquid.
- the inner cylindrical outer cup 50A is submerged in the cleaning liquid stored in the cleaning tank 52Aa. 2 is not affected by the atmosphere of the processing space 2 and is not contaminated by the SC-1 solution.
- the mist of the SC-1 solution may fall to the surface of the cleaning liquid in the cleaning tank 52Aa.
- the contamination is low.
- the contamination of the inner cylindrical outer cup 50A is not substantially a problem.
- the inner cylindrical outer cup 50A is used when performing liquid treatment with a relatively highly contaminated chemical solution, and the outer side when performing liquid treatment with a relatively less contaminated chemical solution. It is preferable to use the cylindrical outer cup 50B.
- the nozzle support arm 82 that holds the nozzle at the tip portion thereof goes straight through the side opening 50m formed in the side portion of the cylindrical outer cup 50A, 50B, and is cylindrical. It is possible to enter the inside of the outer cup. For this reason, when the chemical liquid is supplied from the nozzle 82a to the wafer W, the chemical liquid atmosphere is prevented or greatly suppressed from diffusing outward from the space above the wafer in the radial direction.
- the upper openings 50n of the cylindrical outer cups 50A and 50B are closed by the top plate 32 or the air hood 70, so that the chemical atmosphere is diffused further upward from the space above the wafer. Is prevented or greatly suppressed.
- the rectifying plate 140 and the liquid receiving member 130 provided together with the top plate 32 are preferably provided, but may be omitted.
- the outer diameter of the top plate 32 is made slightly smaller than the diameter of the inner wall surface of the inner cylindrical outer cup 50A, and the top plate 32 is positioned inside the upper end of the cylindrical outer cup 50A in the raised position.
- a single nozzle arm may have two (or more) nozzles that supply two (or more) different chemical solutions, respectively.
- a nozzle for supplying SPM liquid to one nozzle arm and a nozzle for supplying SC-1 liquid may be provided.
- the SPM process and the SC-1 process are performed as the chemical process, but the present invention is not limited to this.
- the two liquid treatments performed in the two cylindrical cups can be any chemical treatment that can cause a problem of cross contamination.
- One of the two liquid processes performed in the two cylindrical outer cups may be a chemical process, and the other may be a rinse (pure water rinse) process.
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Abstract
Description
Claims (13)
- 基板を水平に保持して回転させる基板保持部と、
前記基板保持部に保持された基板に対して第1の処理液を供給する第1処理液供給ノズルと、前記基板保持部に保持された基板に対して第2の処理液を供給する第2処理液供給ノズルと、
前記基板保持部に保持された基板の径方向周囲に、上端が基板より上方に位置するよう設けられ、前記第1処理液供給ノズルまたは前記第2処理液供給ノズルにより基板に供給された後の処理液を受ける液受けカップと、
前記液受けカップの周囲に配設され、その上端が前記液受けカップの上方にある上昇位置と、前記上昇位置よりも下方に位置する下降位置との間で昇降自在な、上部に上部開口が形成された筒状の第1筒状外カップと、
前記液受けカップの周囲であって前記第1筒状外カップの外側に配設され、その上端が前記カップの上方にある上昇位置と、前記上昇位置よりも下方に位置する下降位置との間で昇降自在な、上部に上部開口が形成された筒状の第2筒状外カップと、
を備えた液処理装置。 - 前記第1処理液供給ノズルから基板に第1の処理液を供給するときは、前記第1筒状外カップを前記上昇位置に位置させるとともに前記第2筒状外カップを前記下降位置に位置させ、
前記第2処理液供給ノズルから基板に第2の処理液を供給するときは、前記第1筒状外カップを前記下降位置に位置させるとともに前記第2筒状外カップを前記上昇位置に位置させる、請求項1に記載の液処理装置。 - 前記第1処理液供給ノズルをその先端部に保持する第1ノズルアームと、前記第1ノズルアームをその長手方向に直進させる第1アーム駆動機構と、前記第2処理液供給ノズルをその先端部に保持する第2ノズルアームと、前記第2ノズルアームをその長手方向に直進させる第2アーム駆動機構と、をさらに備え、
前記第1筒状外カップの側部には第1側部開口が設けられており、前記第1アーム駆動機構により前記第1ノズルアームを直進させることにより、前記第1側部開口を通って、前記第1ノズルアームの先端部が前記上昇位置にある前記第1筒状外カップの内側に進入することができるようになっており、前記第2筒状外カップの側部には第2側部開口が設けられており、前記第2アーム駆動機構により前記第2ノズルアームを直進させることにより、前記第2側部開口を通って、前記第2ノズルアームの先端部が前記上昇位置にある前記第2筒状外カップの内側に進入することができるようになっている、請求項1または2に記載の液処理装置。 - 洗浄液を貯留する第1洗浄槽をさらに備え、第1洗浄槽は、前記下降位置にある前記第1筒状外カップが第1洗浄槽に貯留された洗浄液内に浸漬されるように設けられている、請求項1または2に記載の液処置装置。
- 洗浄液を貯留する第2洗浄槽をさらに備え、第2洗浄槽は、前記下降位置にある前記第2筒状外カップが第2洗浄槽に貯留された洗浄液内に浸漬されるように設けられている、請求項4に記載の液処置装置。
- 前記基板保持部に保持された基板を上方から覆う天板をさらに備え、前記天板は、前記上昇位置にある前記第1筒状外カップの上部開口を閉塞して、前記第1筒状外カップの内側かつ前記天板の下方に第1の処理空間を形成する、請求項1または2に記載の液処理装置。
- 前記基板保持部に保持された基板を上方から覆い、清浄化されたガスを下方向に流すエアフードをさらに備え、前記エアフードは、前記上昇位置にある前記第2筒状外カップの上部開口を閉塞して、前記第2筒状外カップの内側かつ前記エアフードの下方に清浄化されたガスが流れる第2の処理空間を形成する、請求項1または2に記載の液処理装置。
- 前記液受けカップは、固定した位置に設けられたドレインカップと、前記ドレインカップの内側に昇降可能に設けられた案内カップとからなり、前記案内カップが昇降することにより処理に供された後の前記第1の処理液と前記第2の処理液とを異なる排液部に導く、請求項1に記載の液処理装置。
- 基板を水平に保持して回転させる基板保持部と、
前記基板保持部に保持された基板に対して第1の処理液を供給する第1処理液供給ノズルと、前記基板保持部に保持された基板に対して第2の処理液を供給する第2処理液供給ノズルと、
前記基板保持部に保持された基板の径方向周囲に、上端が基板より上方に位置するよう設けられ、前記第1処理液供給ノズルまたは前記第2処理液供給ノズルにより基板に供給された後の処理液を受ける液受けカップと、
前記液受けカップの周囲に配設され、その上端が前記液受けカップの上方にある上昇位置と、前記上昇位置よりも下方に位置する下降位置との間で昇降自在な、上部に上部開口が形成された筒状の第1筒状外カップと、
前記液受けカップの周囲であって前記第1筒状外カップの外側に配設され、その上端が前記カップの上方にある上昇位置と、前記上昇位置よりも下方に位置する下降位置との間で昇降自在な、上部に上部開口が形成された筒状の第2筒状外カップと、
を備えた液処理装置を用いた液処理方法において、
前記第1筒状外カップを上昇位置に位置させるとともに前記第2筒状外カップを下降位置に位置させた状態で前記基板保持部に保持された基板を回転させて、前記第1のノズルから前記基板に前記第1の処理液を供給して基板に第1の液処理を施す第1液処理工程と、
前記第2筒状外カップを上昇位置に位置させるとともに前記第1筒状外カップを下降位置に位置させた状態で前記基板保持部に保持された基板を回転させて、前記第2のノズルから前記基板に前記第2の処理液を供給して基板に第2の液処理を施す第2液処理工程と、を備えた液処理方法。 - 前記第1液処理工程を実行する際に、前記第1筒状外カップの側部に設けられた第1側部開口を通って、前記第1処理液供給ノズルをその先端部に保持する第1ノズルアームの先端側を前記第1筒状外カップの内側に進入させ、前記第2液処理工程を実行する際に、前記第2筒状外カップの側部に設けられた第2側部開口を通って、前記第2処理液供給ノズルをその先端部に保持する第2ノズルアームの先端側を前記第2筒状外カップの内側に進入させる、請求項9に記載の液処理方法。
- 前記第1筒状外カップは、下降位置にあるときに、第1洗浄槽に貯留された洗浄液内に浸漬され、前記第2筒状外カップは、下降位置にあるときに、第2洗浄槽に貯留された洗浄液内に浸漬される、請求項9または10に記載の液処理方法。
- 前記第1液処理工程を実行する際に、天板が、前記上昇位置にある前記第1筒状外カップの上部開口を閉塞して、基板を上方から覆うとともに前記第1筒状外カップの内側かつ前記天板の下方に第1の処理空間を形成し、前記第2液処理工程を実行する際に、エアフードが、前記上昇位置にある前記第2筒状外カップの上部開口を閉塞して、基板を上方から覆うとともに前記第2筒状外カップの内側かつ前記エアフードの下方に第2の処理空間を形成し、当該第2の処理空間内に清浄化されたガスを下方向に流す、請求項9または10に記載の液処理方法。
- 前記液受けカップが昇降可能な可動部分を有しており、前記第1の処理液により処理が行われる際と前記第2の処理液により処理が行われる際とで前記可動部分が異なる高さに位置して、処理に供された後の前記第1の処理液と前記第2の処理液とを異なる排液部に導く請求項9または10に記載の液処理方法。
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