WO2013035642A1 - インプリントモールドの製造方法及びレジスト現像装置 - Google Patents
インプリントモールドの製造方法及びレジスト現像装置 Download PDFInfo
- Publication number
- WO2013035642A1 WO2013035642A1 PCT/JP2012/072182 JP2012072182W WO2013035642A1 WO 2013035642 A1 WO2013035642 A1 WO 2013035642A1 JP 2012072182 W JP2012072182 W JP 2012072182W WO 2013035642 A1 WO2013035642 A1 WO 2013035642A1
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- WIPO (PCT)
- Prior art keywords
- substrate
- developer
- processed
- supply pipe
- discharge
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/22—Component parts, details or accessories; Auxiliary operations
- B29C39/38—Heating or cooling
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/30—Imagewise removal using liquid means
- G03F7/3021—Imagewise removal using liquid means from a wafer supported on a rotating chuck
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/0002—Lithographic processes using patterning methods other than those involving the exposure to radiation, e.g. by stamping
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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
Definitions
- the present invention relates to a method for producing an imprint mold and a resist developing device for supplying a developer.
- a resist development apparatus used in the field of lithography is known (see, for example, Patent Document 1).
- the resist developing apparatus is an apparatus that dissolves unnecessary portions of the resist film with the developer by supplying the developer to the exposed resist film.
- resist development In recent years, with the high integration of semiconductor devices, development resolution has been strongly desired.
- resist development When developing a resist film with a developer (hereinafter, also referred to as “resist development”), unnecessary portions of the resist film are removed with a developer as described above, but a resist pattern (hereinafter simply referred to as “pattern”) is developed during development.
- the edge part of) may also sag. As a result, the corners of the edges of the pattern are deformed in shape, leading to a decrease in resolution.
- low temperature development method a method of developing a resist film using a “low temperature developer” lower than room temperature (hereinafter referred to as “low temperature development method”) is known (for example, (See Patent Document 2).
- low temperature development method a method of developing a resist film using a “low temperature developer” lower than room temperature
- the edge portion of the pattern is less likely to sag during development.
- the shape collapse of the edge portion of the pattern is suppressed, and the resolution is improved.
- “normal temperature” described in this document refers to “temperature within a range of 15 ° C. to 25 ° C.”. Therefore, the temperature of the developer used in the low temperature development method is less than 15 ° C.
- a developing solution is stored in a storage unit and controlled to a constant (desired) temperature, and a substrate to be processed is passed from the storage unit to a developing solution supply pipe (hereinafter referred to as a “supply pipe”).
- a developing solution supply pipe hereinafter referred to as a “supply pipe”. It is a mechanism to supply the developer to.
- the resist developing device has such a mechanism, even when the developer stored in the storage unit is controlled to a constant (desired) temperature, the resist developing device is supplied to the substrate to be processed from there through the supply pipe.
- the temperature of the developer may vary because it is easily affected by the environmental temperature. As a result, there is a risk that the stability and uniformity of the development process may be impaired due to temperature fluctuations of the developer. Specifically, development unevenness may occur in the same (one) substrate, and development may vary between different substrates.
- the present invention has been devised to solve the above-described problems, and suppresses temperature fluctuations of the developer actually supplied to the substrate to be processed, and processing of the substrate to be processed accompanied by the supply of the developer.
- the present invention provides a method for producing an imprint mold and a resist developing apparatus capable of stably performing the above process.
- an imprint mold manufacturing method for forming a concavo-convex pattern on a substrate to be processed, using a development process performed by discharging a developing solution to the substrate to be processed by a supply pipe.
- a first fluctuating operation step of discharging the developer by changing the discharge direction to a non-reaching direction so that the developer does not reach the substrate to be processed when the developer in the supply pipe is not in the proper temperature range; , After the first fluctuating operation process, when the discharged developer reaches an appropriate temperature range, the discharge direction is changed in the arrival direction so that the developer reaches the substrate to be processed, and the developer is
- a method for producing an imprint mold comprising: a second variable operation step of discharging.
- the first variation when the time from developing the previous substrate to be processed to developing the next substrate to be processed is longer than the allowable time, the first variation The method for manufacturing an imprint mold according to the first aspect, wherein the operation step and the second variable operation step are performed.
- the first variation operation step and the second variation between the time when the previous substrate to be processed is developed and the time when the next substrate to be processed is developed is developed.
- a fourth aspect of the present invention in the first fluctuating operation step, more than the entire amount of the developer remaining in the supply pipe is discharged without reaching the substrate to be processed. It is a manufacturing method of an imprint mold given in the above 3rd mode.
- the substrate to be processed is a mold substrate for nanoimprint.
- a sixth aspect of the present invention is the imprint mold manufacturing method according to the fifth aspect, wherein the appropriate temperature range is 0 ° C. or less.
- the seventh aspect of the present invention is A resist developing apparatus for supplying a developing solution to a substrate to be processed and developing the substrate, A reservoir for storing the developer controlled to a constant temperature; A holding unit for holding the substrate to be processed; A flow path for flowing the developer stored in the storage section is formed, and a discharge section that discharges the developer flowing along the flow path is provided, and the substrate to be processed held by the holding section A supply pipe for supplying the developer to the substrate to be processed by discharging the developer from the discharge unit toward the substrate; A first fluctuating operation for changing the discharge direction of the discharge portion in a non-reachable direction so that the developer discharged from the discharge portion of the supply pipe does not reach the substrate to be processed, and discharge from the discharge portion of the supply pipe
- a resist developing apparatus comprising: a changing unit that executes a second changing operation for changing the discharge direction of the discharge unit in the arrival direction so that the developer reaches the substrate to be processed.
- the eighth aspect of the present invention is In the first variation operation, before the first variation operation, all or more of the developer remaining in the supply pipe is discharged from the discharge portion of the supply pipe without reaching the substrate to be processed.
- the resist developing apparatus according to the seventh aspect which is characterized in that
- the ninth aspect of the present invention provides The resist developing apparatus according to the eighth aspect, wherein a temperature adjusting unit is provided in a part of the supply pipe.
- the tenth aspect of the present invention provides The resist developing apparatus according to the ninth aspect, wherein the substrate to be processed to which the developer is supplied is a mold substrate for nanoimprinting.
- the eleventh aspect of the present invention is The resist developing apparatus according to the tenth aspect, further comprising a liquid temperature control unit configured to control the developer stored in the storage unit to a low temperature of 0 ° C. or lower.
- the present invention it is possible to suppress the temperature fluctuation of the developer actually supplied to the substrate to be processed, and to stably process the substrate to be processed with the supply of the developer.
- FIG. 1 is a schematic diagram of the overall configuration of a resist developing apparatus 1 shown as an embodiment of the present invention.
- the resist developing apparatus 1 shown in the figure is largely configured to include a developer supply unit 2 and a development processing unit 3.
- the developing solution supply unit 2 is a portion that supplies a developing solution necessary for the developing process in the developing processing unit 3.
- the developer supply unit 2 includes at least a storage unit 4 that stores the developer and a supply pipe 5 that supplies (transports) the developer.
- the development processing unit 3 is a part that performs development processing on the substrate 6 to be processed.
- the development processing unit 3 includes at least a processing chamber 7 having a space for development processing, a holding unit 8 that holds the substrate 6 to be processed in the processing chamber 7, and a rotation driving unit 9 that rotationally drives the holding unit 8.
- a processing chamber 7 having a space for development processing
- a holding unit 8 that holds the substrate 6 to be processed in the processing chamber 7
- a rotation driving unit 9 that rotationally drives the holding unit 8.
- the reservoir 4 is, for example, a tank body having an upper part or a part of the upper part opened, and the outer side of the inner wall made of a heat insulating material, the upper opening of the tank body being substantially closed, and And a lid having an outer wall made of a heat insulating material, and the lid has a tank structure capable of thermally sealing the inside of the tank body. That is, the storage part 4 has a substantially sealed tank structure covered with a heat insulating material.
- An appropriate amount of developer 11 is stored (stored) in the storage unit 4.
- the developer 11 is liquid at an assumed set temperature.
- a space above the liquid surface of the developer 11 is a space (hereinafter referred to as “sealed space”) 12 that is thermally sealed by the lid described above.
- the developer 11 stored in the storage unit 4 is controlled to a constant temperature state by a liquid temperature control means (not shown).
- a liquid temperature control means for example, although not shown, the developer 11 in the reservoir 4 is stirred with a stirrer, and the developer 11 is supplied by a cooler and a heater disposed in the tank. It is conceivable that the temperature of the developer 11 is maintained at a predetermined temperature (hereinafter, “set temperature”) by cooling. Further, as another form, a part of the supply pipe 5 on the downstream side of the storage unit 4 is submerged in a heat medium of a constant temperature bath previously controlled at a predetermined set temperature as a heat exchange coil, and the heat exchange is performed.
- a form of controlling the temperature of the developer 11 passing through the coil portion is conceivable. Whichever form is adopted, the temperature of the developer 11 in the reservoir 4 is within an allowable range (for example, within ⁇ 0.1 ° C.) centered on a set temperature (for example, ⁇ 10 ° C.). Controlled to hold
- the supply pipe 5 supplies the developer 11 stored in the storage unit 4 toward the substrate 6 to be processed.
- the substrate 6 to be processed is set in the processing chamber 7 of the development processing unit 3.
- the substrate 6 to be processed is a substrate having an exposed resist film.
- a mold manufacturing substrate for nanoimprinting can be cited.
- a nanoimprint mold production substrate (hereinafter also simply referred to as a “mold substrate”) is a substrate that becomes a mold corresponding to the original mold when a pattern is transferred by a nanoimprint method.
- a mold corresponding to an original mold of imprint refers to a “mold substrate for imprint”.
- the imprint mold substrate is also referred to as an imprint mold.
- the supply pipe 5 is configured using, for example, an elongated hollow pipe having a circular cross section.
- One end of the supply pipe 5 is a take-in part 13 that is opened to take the developer 11 into the pipe, and the other end is a discharge part 14 that is opened to discharge the developer 11. Yes.
- the supply pipe 5 is provided with stretchability, airtightness, springiness in the front stage of the discharge unit 14 so that the discharge direction of the supply liquid from the discharge unit 14 can be freely changed.
- a hollow bellows portion 5A having substantially the same diameter as the supply pipe 5 having (elastic force) is provided.
- the elastic force of the bellows portion 5A works so that the hollow portion always keeps the horizontal state, and acts so as to repel the bending from the horizontal state.
- the material of the bellows portion 5A is made of metal, for example, according to the material of the supply pipe 5.
- the bellows part 5A may be integrally formed with the supply pipe 5, or may be formed integrally with the supply pipe 5 by joining, but from the viewpoint of preventing impurity contamination from the joint part,
- the bellows portion 5A is preferably formed integrally with the supply pipe 5.
- the fluctuation control mechanism and fluctuation control operation of the discharge direction of the discharge section 14 realized by providing the bellows section 5A in the supply pipe 5 will be described in detail later.
- the discharge part 14 may be only one opening, and may be a structure like a shower head provided with a plurality of small openings. Moreover, the discharge part 14 may have a structure like a spray nozzle chip that ejects the developer 11 in a spray form.
- the bellows portion 5A is provided to change the discharge direction of the supply liquid from the discharge portion 14 of the supply pipe 5, but a configuration in which the discharge direction is changed by other than that may be adopted. Good.
- the take-in part 13 of the supply pipe 5 is arranged in the storage part 4 of the developer supply part 2. Further, the discharge unit 14 of the supply pipe 5 is disposed in the processing chamber 7 of the development processing unit 3. The supply pipe 5 is piped so that the flow path of the developer 11 is formed between the intake part 13 as the most upstream part and the discharge part 14 as the most downstream part.
- the supply pipe 5 is piped so as to lead out from the inside of the storage section 4 to the outside. Furthermore, the lead-out portion of the supply pipe 5 outside the storage unit 4 extends through the outer wall portion of the development processing unit 3 into the processing chamber 7 and is piped to a position facing the holding unit 8 in the processing chamber 7. Has been.
- the position facing the holding unit 8 is a position where the developer 11 discharged from the discharge unit 14 of the supply pipe 5 can be supplied to the substrate 6 to be processed held by the holding unit 8.
- the discharge section 14 located on the most downstream side of the supply pipe 5 is disposed immediately above the substrate 6 to be processed held by the holding section 8.
- an on-off valve 15 and a pump 16 are provided in the middle of the supply pipe 5.
- the on-off valve 15 is disposed inside the processing chamber 7.
- the reason why the on-off valve 15 is arranged inside the processing chamber 7 is as follows. That is, the pipe portion of the supply pipe 5 (the pipe portion exposed to the outside) that extends downstream from the attachment site of the on-off valve 15 remains there, or the temperature fluctuation factor of the developer 11 that flows therethrough It becomes. Therefore, in order to suppress the temperature fluctuation of the developing solution 11, it is effective to shorten the length of the piping portion of the supply pipe 5 that extends downstream from the attachment site of the opening / closing valve 15.
- the on-off valve 15 is arranged inside the processing chamber 7 so as to be located as close to the discharge unit 14 as possible.
- the pump 16 is disposed outside the storage unit 4. Both the on-off valve 15 and the pump 16 are members for controlling the flow of the developer 11 in the supply pipe 5.
- the on-off valve 15 allows the flow of the developing solution 11 by opening the pipe line of the supply pipe 5, and the pipe line of the supply pipe 5. Is closed to prevent the developer 11 from flowing.
- the on-off valve 15 serves as a member that functions to start or stop the supply of the developer 11.
- the pump 16 generates power for generating a flow of the developer 11 along the supply pipe 5 when the pump 16 is actually driven.
- the pump 16 applies pressure to the developer 11 for suction and transfer of the developer 11. That is, the pump 16 serves as a drive source for sucking the developer 11 stored in the storage unit 4 into the supply pipe 5 and transferring the sucked developer 11 along the supply pipe 5. Therefore, in the state where the driving of the pump 16 is stopped (off state), the flow of the developing solution 11 is not formed inside the supply pipe 5, but in the state where the driving of the pump 16 is started or continued (on state), the supply is performed. A flow of the developer 11 is formed inside the tube 5.
- the pump 16 is first operated and the open / close valve 15 is opened immediately thereafter.
- the opening / closing valve 15 is first closed and the pump 16 is stopped immediately thereafter.
- the open / close state of the on-off valve 15 and the drive (on / off) state of the pump 16 can be controlled by, for example, a main control unit of a resist developing device (not shown).
- the supply pipe 5 led out of the storage unit 4 is covered with a jacket 17.
- the jacket 17 is provided in a part of the supply pipe 5 as an example of a temperature adjustment unit.
- the jacket 17 is interposed between the supply pipe 5 and the ambient air (atmosphere) around it to form a temperature adjustment function.
- a cooling medium is flowed around the supply pipe 5 to cause it to flow.
- the developer 11 in the supply pipe 5 has a function (cooling function) for maintaining the same temperature (set temperature) as that in the storage unit 4.
- the jacket 17 has, for example, a multiple tube structure (including a double or triple tube structure) with the supply tube 5 as the center.
- the jacket 17 has a triple-pipe structure including the supply pipe 5 as shown in FIG.
- the supply pipe 5 is a pipe located on the innermost side, a second pipe 18 having a diameter larger than that of the supply pipe 5 is disposed on the outer side thereof, and a second pipe on the outer side (that is, the outermost side).
- a third pipe 19 having a diameter larger than 18 is arranged.
- a cooling liquid circulates between the outer peripheral surface of the supply pipe 5 and the inner peripheral surface of the second pipe 18 in order to form a cooling layer 18 a there.
- air preferably cold air
- the jacket 17 is continuous in the length direction of the supply pipe 5 with a pipe portion extending from the storage section 4 to the processing chamber 7 of the development processing section 3 and a pipe section reaching the position facing the holding section 8 in the processing chamber 7. It is provided in a state covering the supply pipe 5.
- the jacket 17 is a pipe portion extending from the storage section 4 to the processing chamber 7 of the development processing section 3, and is provided in a state of covering the supply pipe 5 except for the mounting portion of the on-off valve 15 and the mounting portion of the pump 16. It has been.
- a jacket 17 is provided inside the processing chamber 7 with the attachment site of the on-off valve 15 as an end position.
- the development processing unit 3 includes the processing chamber 7, the holding unit 8, and the rotation driving unit 9.
- the holding unit 8 is configured by using a spin chuck 21 that supports the substrate 6 to be processed in a fixed state, and a spindle shaft 22 connected to the spin chuck 21.
- the substrate 6 to be processed is a disk
- the spin chuck 21 is formed in a circular shape in plan view similar to this.
- the outer diameter of the spin chuck 21 is smaller than the outer diameter of the substrate 6 to be processed, but the magnitude relationship between the two is not limited to this, and the same outer diameter may be used.
- the reverse magnitude relationship may be used.
- the planar view shape of the spin chuck 21 is not limited to a circle, and may be a polygon including a rectangle.
- the spin chuck 21 has at least the surface facing the substrate 6 to be processed (the upper surface of the spin chuck in the illustrated example) disposed horizontally.
- the spin chuck 21 supports the substrate 6 to be processed from the lower surface side with the substrate 6 to be processed placed on the upper surface thereof. Further, the spin chuck 21 is configured to fix the substrate 6 to be processed by a vacuum suction method.
- the support structure by the spin chuck 21 is not limited to the vacuum suction method described here, and is a configuration in which the substrate 6 to be processed is supported in a fixed state by another method (for example, an abutting method using pins or the like). Also good.
- the spindle shaft 22 is a shaft that is rotationally driven by the driving force of the rotational drive unit 9.
- the spindle shaft 22 is coupled to the central portion on the lower surface side of the spin chuck 21 using, for example, means such as fitting. For this reason, when the spindle shaft 22 rotates, the spin chuck 21 rotates integrally therewith.
- the spindle shaft 22 is disposed so as to penetrate the bottom wall of the processing chamber 7 partitioned by a box-shaped wall.
- a seal member 23 is provided in a through portion of the spindle shaft 22 in the bottom wall of the processing chamber 7.
- the seal member 23 prevents leakage of liquid (including the developing solution 11) from the penetrating portion of the spindle shaft 22 to the outside of the processing chamber 7 while allowing the spindle shaft 22 to rotate.
- the rotation drive unit 9 is disposed in a lower chamber 24 that is partitioned from the processing chamber 7 by a wall.
- the rotation drive unit 9 is configured by using a motor as a rotation drive source and a drive force transmission mechanism (gear train or the like) that transmits the drive force of the motor to the spindle shaft 22. .
- the resist developing apparatus 1 includes a rinse liquid supply unit as an additional functional unit.
- the rinsing liquid supply unit is a functional unit for supplying a rinsing liquid to the substrate to be processed 6 that has undergone the development process and performing a rinsing process.
- FIG. 3 is a diagram for explaining the configuration of the main part of the resist developing apparatus 1 according to the embodiment of the present invention.
- FIGS. 3 (A) and 3 (B) show the discharge direction of the discharge unit 14 of the supply pipe 5 respectively.
- FIG. 6 is a diagram showing a state in which a developing solution, which will be described later, changes in a non-reaching direction and a reaching direction with respect to the substrate 6 to be processed.
- the supply pipe 5 has stretchability, airtightness, springiness (elasticity) in front of the discharge unit 14 so that the discharge direction of the supply liquid from the discharge unit 14 can be freely changed.
- a bellows portion 5A having a force) is provided.
- a wire 31 is attached to the discharge portion 14 of the supply pipe 5 so as to extend in a substantially horizontal direction by a hook mechanism (not shown).
- the wire 31 is attached to a direction changing mechanism 32 that changes the direction of force from the horizontal direction to the vertical direction (in other words, from the vertical direction to the horizontal direction) while freely rotating like a pulley.
- the wire 31 whose direction is changed from the horizontal direction to the vertical direction passes through the bottom wall of the processing chamber 7 and is disposed in the lower chamber 24.
- a seal member 33 is provided at a portion where the wire 31 penetrates in the bottom wall of the processing chamber 7. The seal member 33 prevents leakage of liquid (including the developer 11) from the penetration portion of the wire 31 to the outside of the processing chamber 7 while allowing the wire 31 to move in the vertical direction.
- the drive unit 34 is disposed at the bottom of the lower chamber 24 and controls the operation of the wire 31 in the vertical direction.
- the drive unit 34 is configured using, for example, a motor serving as a drive source and a drive force transmission mechanism (rotary winding mechanism or the like) that transmits the drive force of the motor to the wire 31 although not illustrated. Yes.
- a motor serving as a drive source
- a drive force transmission mechanism rotary winding mechanism or the like
- the wire 31, the direction changing mechanism 32, and the drive unit 34 constitute a variation mechanism that is a “variation unit” that varies the discharge direction of the discharge unit 14 of the supply pipe 5.
- the developer 11 to be discharged is prevented from reaching the substrate 6 to be processed or is allowed to reach.
- the variation mechanism does not necessarily include the wire 31, the direction conversion mechanism 32, and the drive unit 34, and can change the discharge direction of the developer discharged from the discharge unit 14 of the supply pipe 5. I just need it.
- the discharge direction of the discharge portion 14 of the supply pipe 5 is “a non-reaching direction” for preventing the developer from reaching the substrate 6 to be processed and “arrival direction” for allowing the developer to reach the substrate 6 to be processed. Is set, and can be freely changed by a changing mechanism.
- the non-reaching direction is a direction in which the developer 11 discharged from the discharge portion 14 of the supply pipe 5 does not reach the substrate 6 to be processed.
- the discharge direction of the discharge section 14 of the supply pipe 5 is changed as shown in FIG. 3A so that the developer 11 discharged from the discharge section 14 of the supply pipe 5 does not reach the substrate 6 to be processed.
- the supply of the developer 11 to the substrate 6 to be processed is prevented (prohibited).
- the arrival direction is a direction in which the developer 11 discharged from the discharge portion 14 of the supply pipe 5 reaches the substrate 6 to be processed.
- the discharge direction of the discharge section 14 of the supply pipe 5 is changed as shown in FIG. 3B so that the developer 11 discharged from the discharge section 14 of the supply pipe 5 reaches the substrate 6 to be processed.
- the supply of the developer 11 to the substrate 6 is permitted.
- the temperature of the developer 11 stored in the storage unit 4 is controlled by liquid temperature control means (not shown), so that the developer 11 in the storage unit 4 is set to a set temperature (for example, -10 ° C).
- a set temperature for example, -10 ° C.
- the rotation drive unit 9 is driven to rotate the spindle shaft 22.
- the spin chuck 21 supporting the substrate 6 to be processed is rotated integrally with the spindle shaft 22.
- the pump 16 is driven, and immediately after that, the on-off valve 15 is opened to take in the developer 11 in the reservoir 4 into the supply pipe 5, and this supply pipe 5, the developer 11 is sent to the development processing unit 3 side. Then, the developer 11 is discharged from the discharge portion 14 located on the most downstream side of the supply pipe 5.
- the attachment portion of the on-off valve 15 not covered with the jacket 17 and the piping portion of the supply pipe 5 on the downstream side are strongly affected by the environmental temperature, and the temperature is not controlled. Moreover, if all the piping parts of the supply pipe 5 are covered with the jacket 17, the equipment becomes very large and the equipment cost increases. For this reason, the temperature of the developer passing through the supply pipe 5 may fluctuate beyond the appropriate temperature range.
- the above “appropriate temperature range” refers to an appropriate temperature range required for the developer 11 actually supplied to the substrate 6 to be processed in obtaining a pattern satisfying a desired resolution by the development process.
- the discharge direction of the discharge unit 14 connected to the bellows part 5 ⁇ / b> A by pulling the wire 31 vertically downward by driving the drive unit 34 is processed as the first variable operation step. Fluctuate in a non-reaching direction that does not reach the substrate 6 and stop (standby) (see FIG. 1). In this state, the developer 11 is discharged from the discharge portion 14 of the supply pipe 5 until the temperature of the developer 11 passing through the supply pipe 5 falls within an appropriate temperature range.
- the drive unit 34 loosens the wire 31 vertically upward as a second variable operation step after the first variable operation step. Due to the elastic force of the bellows portion 5A, the discharge direction of the discharge portion 14 connected to the bellows portion 5A is changed to the arrival direction reaching the substrate 6 to be processed, and in this state, development from the discharge portion 14 of the supply pipe 5 is performed. The operation of discharging the liquid 11 is performed. As a result, the developer 11 reaches the surface (upper surface) of the substrate 6 being rotated. At this time, it is assumed that the developer 11 reaches at least a region including the central portion of the substrate 6 to be processed in the plane of the substrate 6 to be processed.
- the developing solution 11 is uniformly supplied to the entire substrate to be processed 6 by the centrifugal force accompanying the rotation of the substrate to be processed 6.
- the soluble part of the exposed resist film formed on the surface of the substrate 6 to be processed is dissolved and removed by a chemical reaction with the developer 11.
- the substrate 6 to be processed is developed in the processing chamber 7.
- the supply of the developer 11 is stopped by switching the open / close valve 15 from the open state to the closed state, and then the drive of the pump 16 is stopped as necessary.
- a rinse liquid is supplied to the substrate 6 to be processed by a rinse liquid supply unit (not shown) to perform a rinse process.
- the supply of the rinsing liquid is stopped and spin drying is performed.
- the developed substrate to be processed 6 is removed from the spin chuck 21 of the holding unit 8, and instead, the undeveloped substrate 6 to be processed is held in the same manner as described above. Hold at 8. Thereafter, development processing, rinsing processing, and drying processing (spin drying) of the substrate 6 to be processed are performed in the same procedure as described above.
- the development processing of the (n + 1) th substrate 6 is started.
- the supply of the developer 11 is maintained in a stopped state by the on-off valve 15. For this reason, the developer 11 remains in the supply pipe 5 during that time.
- the development processing of the (n + 1) th substrate to be processed 6 is started, the developer 11 remaining in the supply pipe 5 until then is directed from the discharge portion 14 of the supply pipe 5 toward the substrate 6 to be processed. Supplied.
- the substrate 6 to be processed is developed one by one in the resist developing apparatus 1.
- “development of the nth substrate to be processed 6” is read as “nth development of the substrate to be processed 6”.
- the temperature of the developer 11 remaining in the supply pipe 5 is maintained at a temperature equivalent to that of the developer 11 in the storage unit 4 by the jacket 17, but the opening / closing valve 15 is not covered by the jacket 17.
- the pipe portion of the supply pipe 5 on the downstream side thereof is strongly influenced by the environmental temperature, so that temperature control cannot be performed with high accuracy. For this reason, when the development processing of the substrate 6 is finished and the supply of the developing solution 11 is stopped, the temperature of the developing solution 11 remaining in the middle of the supply pipe 5 in the processing chamber 7 is particularly the ambient temperature (room temperature or the like). ) And change gradually. Further, as the remaining time of the developer 11 becomes longer, the temperature change of the developer becomes larger accordingly.
- the temperature of the remaining developer 11 may fluctuate beyond the appropriate temperature range. Even when the developing solution 11 does not remain in the supply pipe 5 on the downstream side of the attachment site of the on-off valve 15 (empty state), the temperature of the supply pipe 5 changes due to the influence of the environmental temperature. In some cases, the temperature of the developer passing through the temperature fluctuates beyond an appropriate temperature range.
- the main control unit of the resist developing apparatus 1 performs the first fluctuating operation step and fluctuating the discharge direction of the discharge unit 14 described below.
- the operation of the resist developing apparatus 1 is controlled so as to perform the two variable operation steps.
- the operation control by the main control unit described above may be performed every time the substrate 6 to be processed held by the holding unit 8 is replaced. However, when the replacement can be performed in a short time, the influence of the environmental temperature is reduced accordingly, and therefore the first variable operation process and the second variable operation process are not necessarily performed. In such a case, it is conceivable that such variable motion control is applied only when a predetermined condition is satisfied.
- the elapsed time after the supply of the developer 11 is stopped by the closing operation of the on-off valve 15 is measured by a timer or the like, and the measured value exceeds a predetermined allowable time.
- the “allowable time” described here is the temperature of the developer 11 remaining in the middle of the piping of the supply pipe 5 (particularly, the pipe portion not covered with the jacket 17), or the supply pipe 5 not covered with the jacket 17. This time is set under the condition that the temperature of the developer 11 supplied therethrough does not exceed the appropriate temperature range even if the temperature of the developer 11 changes under the influence of the environmental temperature.
- a temperature sensor (not shown) is provided at a location not covered by the jacket 17, for example, the discharge portion 14 of the supply pipe 5, and the temperature of the developer 11 in the supply pipe 5 is estimated from the value detected by this temperature sensor.
- the first variable operation process may be executed, and when the temperature is within the appropriate temperature range, the second variable operation process may be executed.
- the first variable operation step and the second variable operation step are performed in the following procedure.
- the operation of the resist developing apparatus 1 will be described assuming that the developer 11 remains in the piping portion downstream of the attachment site of the on-off valve 15 in the piping direction of the supply pipe 5.
- the wire 31 is pulled vertically downward by the drive of the drive unit 34. Thereby, the direction of the force is converted into the d1 direction (see FIG. 3A) by the direction conversion mechanism 32. For this reason, the discharge direction of the discharge part 14 connected to the bellows part 5A varies in the non-reaching direction.
- the discharge unit 14 stops in a non-reaching direction in which the developer cannot reach the substrate 6 to be processed.
- the developing solution 11 is discharged from the discharge portion 14 of the supply pipe 5 by opening the on-off valve 15 and driving the pump 16 while the substrate 6 to be processed is rotated as described above.
- the developer 11 (hereinafter also referred to as “residual developer”) 11 that has remained in the middle of the supply pipe 5 is discharged from the discharge portion 14 of the supply pipe 5 first.
- the residual developer 11 is not supplied to the substrate 6 to be processed. This is the first variable operation process.
- the discharge portion of the supply pipe 5 does not reach the substrate 6 to be processed with the entire amount of the developing solution 11 remaining in the supply pipe 5 before the first variable operation step. 14 is preferably discharged.
- the temperature of the supply pipe 5 itself receives a low temperature energy of the developer 11 flowing in the supply pipe 5 and the temperature is close to the temperature of the developer 11 in the storage section 4 (low temperature). It is preferable to discharge the developer 11 in an amount necessary to reach the state.
- the present invention is not limited to this, and the developer 11 that is not properly temperature-controlled and remains in the supply pipe 5 downstream from the attachment site of the on-off valve 15 before the first variable operation step is started. The ejection may be performed only by the first variable operation process.
- the discharge direction of the discharge portion 14 is changed from the non-reaching direction to the reaching direction.
- the wire 31 is loosened vertically upward by driving the drive unit 34.
- the direction of the force is converted into the d2 direction (see FIG. 3B) by the direction conversion mechanism 32, and therefore, the elastic force of the bellows portion 5A causes the discharge portion 14 connected to the bellows portion 5A.
- the discharge direction varies in the arrival direction. Thereafter, when the ejection direction of the ejection unit 14 reaches a preset arrival direction, the drive of the drive unit 34 is stopped.
- the discharge direction of the discharge portion 14 of the supply pipe 5 is stopped in the arrival direction in which the developer reaches the substrate 6 to be processed.
- the discharge of the developer 11 may be temporarily stopped or may be continued as it is.
- the developer 11 is discharged from the discharge portion 14 of the supply pipe 5 in a state where the discharge direction of the discharge portion 14 of the supply pipe 5 is changed in the arrival direction. This is the second variable operation process.
- the developer 11 discharged from the discharge portion 14 of the supply pipe 5 surely reaches the substrate 6 to be processed. Therefore, the developer 11 supplied to the substrate 6 to be processed is a developer that is substantially free of residual developer and is controlled at a constant temperature in the reservoir 4.
- a mechanism is provided for changing the discharge direction of the discharge portion 14 for the developer 11 discharged from the discharge portion 14 of the supply pipe 5, and the developer discharged from the discharge portion 14 by this changing mechanism reaches the substrate 6 to be processed.
- the direction and the non-reaching direction can be controlled, and only the developing solution 11 in an appropriate temperature range can be supplied to the substrate 6 to be processed by the changing mechanism.
- the developing solution 11 with suppressed temperature fluctuation can be supplied to the substrate 6 to be processed. Therefore, it is possible to suppress uneven dissolution during development due to temperature fluctuations of the developer 11. Therefore, it is possible to form a pattern with high resolution.
- processing interruption time the time from developing the previous substrate 6 to developing the next substrate 6 (hereinafter referred to as “processing interruption time”) is longer than the allowable time.
- processing interruption time the next substrate 6 to be processed is developed without supplying the developer 11 at the initial stage of discharge with a large temperature variation. can do. For this reason, it becomes possible to perform the development processing of the substrate 6 to be processed stably.
- the expression “develop the next substrate 6 after developing the previous substrate 6” has already been described, but “the nth substrate 6 to be processed”. It means that after the development process is performed, the (n + 1) th development target substrate 6 is developed.
- the substrate 6 to be processed is a mold substrate for nanoimprinting
- the temperature variation of the developer 11 supplied to the substrate 6 to be processed is reduced, so that a fine uneven pattern can be formed with high accuracy. It becomes possible.
- the reason for this is that when forming a concavo-convex pattern on a mold substrate for nanoimprinting, the development temperature is lowered and the development process is performed to reduce the resolution of development due to the shape collapse at the edge of the pattern. This is because it can be prevented.
- the “concave / convex pattern” refers to a pattern formed on the substrate 6 to be processed using a development process. That is, it includes a resist pattern formed on the substrate 6 to be processed, and also includes another pattern layer on the substrate 6 to be processed, which is formed using this resist pattern as a mask. Moreover, the uneven
- the effect is remarkable.
- the configuration of the resist developing apparatus 1 if the configuration of the resist developing apparatus 1 is employed, the temperature of the developer 11 is maintained at a low temperature of 0 ° C. or less, and the temperature fluctuation of the developer 11 is suppressed and supplied to the substrate 6 to be processed. can do.
- a mold substrate for nanoimprinting is developed as the substrate 6 to be processed, it is possible to realize formation of a fine uneven pattern at a nano level.
- the fluctuation mechanism which is a fluctuation part that fluctuates the discharge direction of the discharge part 14, can be realized by a very simple device configuration such as the bellows part 5 ⁇ / b> A provided in the supply pipe 5, the wire 31, the direction changing mechanism 32, and the drive part 34.
- the above-described effects can be achieved at low cost.
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Abstract
Description
前記供給管内の現像液が適温範囲にない場合、当該現像液を前記被処理基板に到達させないように吐出方向を非到達方向へ変動させて、当該現像液を吐出する第1の変動動作工程と、
前記第1の変動動作工程の後、吐出される現像液が適温範囲となった場合、当該現像液を前記被処理基板に到達させるように吐出方向を到達方向へ変動させて、当該現像液を吐出する第2の変動動作工程とを有すること
を特徴とするインプリントモールドの製造方法である。
を特徴とする上記第1の態様に記載のインプリントモールドの製造方法である。
を特徴とする上記第2の態様に記載のインプリントモールドの製造方法である。
を特徴とする上記第3の態様に記載のインプリントモールドの製造方法である。
を特徴とする上記第4の態様に記載のインプリントモールドの製造方法である。
を特徴とする上記第5の態様に記載のインプリントモールドの製造方法である。
被処理基板に現像液を供給して現像処理するレジスト現像装置であって、
恒温状態に制御された現像液を貯留する貯留部と、
前記被処理基板を保持する保持部と、
前記貯留部に貯留された現像液を流すための流路を形成するとともに、この流路に沿って流れた現像液を吐出する吐出部を有し、前記保持部に保持された被処理基板に向けて前記吐出部から現像液を吐出することにより、当該現像液を被処理基板に供給する供給管と、
前記供給管の吐出部から吐出する現像液を前記被処理基板に到達させないように前記吐出部の吐出方向を非到達方向へ変動させる第1の変動動作と、前記供給管の吐出部から吐出する現像液を前記被処理基板に到達させるように前記吐出部の吐出方向を到達方向へ変動させる第2の変動動作とを実行する変動部とを備えること
を特徴とするレジスト現像装置である。
前記第1の変動動作においては、当該第1の変動動作前に前記供給管に残留している現像液の全量以上を前記被処理基板に到達させることなく供給管の吐出部から吐出させること
を特徴とする上記第7の態様に記載のレジスト現像装置である。
前記供給管の一部に温度調整部が設けられていること
を特徴とする上記第8の態様に記載のレジスト現像装置である。
前記現像液の供給対象となる被処理基板が、ナノインプリント用のモールド基板であること
を特徴とする上記第9の態様に記載のレジスト現像装置である。
前記貯留部に貯留された現像液を0℃以下の低温に制御する液温制御手段を備えること
を特徴とする上記第10の態様に記載のレジスト現像装置である。
1.レジスト現像装置の全体構成
2.レジスト現像装置の要部構成
3.レジスト現像装置の動作(インプリントモールドの製造方法)
4.実施の形態の効果
図1は、本発明の実施の形態として示すレジスト現像装置1の全体構成の概略図である。図示したレジスト現像装置1は、大きくは、現像液供給部2と現像処理部3とを備えた構成となっている。
貯留部4は、詳しくは図示しないが、例えば、上部または上部の一部を開口し、かつ、内壁の外側を断熱材で構成した槽本体と、この槽本体の上部開口を略閉塞し、かつ、その内壁の外側を断熱材で構成した蓋体とを備え、この蓋体によって槽本体の内部を熱的に略密閉し得る槽構造になっている。つまり、貯留部4は、断熱材で覆われた略密閉型の槽構造になっている。貯留部4には、適量の現像液11が収容(貯留)されている。現像液11は、想定している設定温度で液体のものが用いられる。貯留部4内において、現像液11の液面よりも上方の空間は、上述した蓋体によって熱的に略密閉された空間(以下、「密閉空間」と記す)12になっている。
現像処理部3は、上述したように処理室7、保持部8および回転駆動部9を備えるものである。このうち、保持部8は、被処理基板6を固定状態に支持するスピンチャック21と、このスピンチャック21に連結されたスピンドル軸22とを用いて構成されている。スピンチャック21は、例えば、被処理基板6が円板であるとすると、これと相似の平面視円形に形成されている。図例ではスピンチャック21の外径が被処理基板6の外径よりも小さくなっているが、両者の大小関係はこれに限らず、互いに同じ外径であってもよいし、図例とは逆の大小関係であってもよい。また、スピンチャック21の平面視形状は円形に限らず、矩形を含む多角形であってもよい。
図3は本発明の実施の形態に係るレジスト現像装置1の要部の構成を説明するものであり、図3(A)、(B)は、それぞれ供給管5の吐出部14の吐出方向が、後述する現像液の被処理基板6に対する非到達方向、到達方向へと変動する様子を示した図である。図3に示すように、供給管5は、吐出部14からの供給液の吐出方向を自在に変動することができるように、吐出部14の前段に、伸縮性、気密性、バネ性(弾性力)がある蛇腹部5Aが設けられている。
非到達方向とは、供給管5の吐出部14から吐出する現像液11を被処理基板6に到達させない方向である。具体的には、供給管5の吐出部14から吐出した現像液11が被処理基板6に到達しないように、供給管5の吐出部14の吐出方向を図3(A)のように変動させることにより、被処理基板6に対する現像液11の供給を阻止(禁止)する方向である。
次に、上記構成からなるレジスト現像装置1の動作(即ちインプリントモールドの製造方法)について説明する。レジスト現像装置1の動作は、上述した主制御部からの制御指令に基づいて行われる。
なお、上記の場合は、レジスト現像装置1において一枚ずつ被処理基板6を現像処理する場合について述べている。一方、レジスト現像装置1において複数枚ずつ被処理基板6を現像処理する場合は、「n枚目の被処理基板6の現像処理」を「n回目の被処理基板6の現像処理」と読み替える。
本発明の実施の形態に係るインプリントモールドの製造方法及びレジスト現像装置1によれば、次のような効果が得られる。
なお、「一つ前の被処理基板6を現像処理してから、次の被処理基板6を現像処理する」と言う表現は、既に述べたところであるが、「n回目の被処理基板6の現像処理を行ってから、n+1回目の被処理基板6の現像処理を行う」ことを意味する。
また、それに伴い、本明細書におけるインプリントモールドには、凹凸パターンが掘り込まれたモールド基板に加え、インプリントの元型に相当するレジストパターン付きの基板や、その他のパターン層付きの基板も含まれる。
2 現像液供給部
3 現像処理部
4 貯留部
5 供給管
5A 蛇腹部
6 被処理基板
7 処理室
8 保持部
11 現像液
14 吐出部
17 ジャケット
31 ワイヤー
32 方向変換機構
34 駆動部
Claims (11)
- 供給管により被処理基板へと現像液を吐出することにより行われる現像処理を用い、被処理基板に凹凸パターンを形成するインプリントモールドの製造方法において、
前記供給管内の現像液が適温範囲にない場合、当該現像液を前記被処理基板に到達させないように吐出方向を非到達方向へ変動させて、当該現像液を吐出する第1の変動動作工程と、
前記第1の変動動作工程の後、吐出される現像液が適温範囲となった場合、当該現像液を前記被処理基板に到達させるように吐出方向を到達方向へ変動させて、当該現像液を吐出する第2の変動動作工程とを有すること
を特徴とするインプリントモールドの製造方法。 - 一つ前の被処理基板を現像処理してから、次の被処理基板を現像処理するまでの時間が許容時間よりも長くなる場合に、前記第1の変動動作工程及び前記第2の変動動作工程を行うこと
を特徴とする請求項1に記載のインプリントモールドの製造方法。 - 一つ前の被処理基板を現像処理してから、次の被処理基板を現像処理するまでの間に、前記第1の変動動作工程及び前記第2の変動動作工程を行うこと
を特徴とする請求項2に記載のインプリントモールドの製造方法。 - 前記第1の変動動作工程においては、前記供給管内に残留している現像液の全量以上を、前記被処理基板に到達させることなく吐出すること
を特徴とする請求項3記載のインプリントモールドの製造方法。 - 前記被処理基板が、ナノインプリント用のモールド基板であること
を特徴とする請求項4に記載のインプリントモールドの製造方法。 - 前記適温範囲は0℃以下であること
を特徴とする請求項5に記載のインプリントモールドの製造方法。
- 被処理基板に現像液を供給して現像処理するレジスト現像装置であって、
恒温状態に制御された現像液を貯留する貯留部と、
前記被処理基板を保持する保持部と、
前記貯留部に貯留された現像液を流すための流路を形成するとともに、この流路に沿って流れた現像液を吐出する吐出部を有し、前記保持部に保持された被処理基板に向けて前記吐出部から現像液を吐出することにより、当該現像液を被処理基板に供給する供給管と、
前記供給管の吐出部から吐出する現像液を前記被処理基板に到達させないように前記吐出部の吐出方向を非到達方向へ変動させる第1の変動動作と、前記供給管の吐出部から吐出する現像液を前記被処理基板に到達させるように前記吐出部の吐出方向を到達方向へ変動させる第2の変動動作とを実行する変動部とを備えること
を特徴とするレジスト現像装置。 - 前記第1の変動動作においては、当該第1の変動動作前に前記供給管に残留している現像液の全量以上を前記被処理基板に到達させることなく供給管の吐出部から吐出させること
を特徴とする請求項7記載のレジスト現像装置。 - 前記供給管の一部に温度調整部が設けられていること
を特徴とする請求項8記載のレジスト現像装置。 - 前記現像液の供給対象となる被処理基板が、ナノインプリント用のモールド基板であること
を特徴とする請求項9に記載のレジスト現像装置。 - 前記貯留部に貯留された現像液を0℃以下の低温に制御する液温制御手段を備えること
を特徴とする請求項10に記載のレジスト現像装置。
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JP2012119576A (ja) * | 2010-12-02 | 2012-06-21 | Hoya Corp | 液体供給装置およびレジスト現像装置 |
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JPH10223507A (ja) * | 1997-02-06 | 1998-08-21 | Dainippon Screen Mfg Co Ltd | 現像装置および基板処理装置 |
JPH11147065A (ja) * | 1997-11-14 | 1999-06-02 | Dainippon Screen Mfg Co Ltd | 基板処理方法および処理装置 |
JP3625755B2 (ja) * | 2000-09-13 | 2005-03-02 | 大日本スクリーン製造株式会社 | 基板処理装置 |
JP3711010B2 (ja) * | 2000-09-27 | 2005-10-26 | 大日本スクリーン製造株式会社 | 基板処理装置および基板処理方法 |
JP4909157B2 (ja) * | 2007-03-30 | 2012-04-04 | 大日本スクリーン製造株式会社 | 基板処理装置 |
JP2009231733A (ja) * | 2008-03-25 | 2009-10-08 | Dainippon Screen Mfg Co Ltd | 基板処理装置 |
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- 2012-08-31 KR KR20147008493A patent/KR20140069075A/ko not_active Application Discontinuation
- 2012-08-31 US US14/241,960 patent/US20140212530A1/en not_active Abandoned
- 2012-08-31 WO PCT/JP2012/072182 patent/WO2013035642A1/ja active Application Filing
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JPH08236435A (ja) * | 1994-09-29 | 1996-09-13 | Tokyo Electron Ltd | 現像装置及び現像処理方法 |
JP2011151326A (ja) * | 2010-01-25 | 2011-08-04 | Tokyo Electron Ltd | 現像処理方法、プログラム、コンピュータ記憶媒体及び現像処理システム |
JP2011171708A (ja) * | 2010-01-25 | 2011-09-01 | Tokyo Electron Ltd | 処理装置、処理方法、プログラム及びコンピュータ記憶媒体 |
JP2012119576A (ja) * | 2010-12-02 | 2012-06-21 | Hoya Corp | 液体供給装置およびレジスト現像装置 |
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