WO2004108252A1 - フィルタ装置及び露光装置並びにデバイスの製造方法 - Google Patents
フィルタ装置及び露光装置並びにデバイスの製造方法 Download PDFInfo
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- WO2004108252A1 WO2004108252A1 PCT/JP2004/007629 JP2004007629W WO2004108252A1 WO 2004108252 A1 WO2004108252 A1 WO 2004108252A1 JP 2004007629 W JP2004007629 W JP 2004007629W WO 2004108252 A1 WO2004108252 A1 WO 2004108252A1
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- Prior art keywords
- humidity
- filter
- temperature
- gas
- air
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0001—Making filtering elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
- B01D46/0036—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions by adsorption or absorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/4263—Means for active 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
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/708—Construction of apparatus, e.g. environment aspects, hygiene aspects or materials
- G03F7/70858—Environment aspects, e.g. pressure of beam-path gas, temperature
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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
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/708—Construction of apparatus, e.g. environment aspects, hygiene aspects or materials
- G03F7/70908—Hygiene, e.g. preventing apparatus pollution, mitigating effect of pollution or removing pollutants from apparatus
- G03F7/70933—Purge, e.g. exchanging fluid or gas to remove pollutants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2279/00—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses
- B01D2279/50—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses for air conditioning
- B01D2279/51—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses for air conditioning in clean rooms, e.g. production facilities for electronic devices, laboratories
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S55/00—Gas separation
- Y10S55/34—Indicator and controllers
Definitions
- the present invention relates to a filter device for removing impurities in a gas and adjusting the humidity of the gas. Further, the present invention relates to an exposure apparatus used in a photolithography step of a manufacturing process of various devices such as a semiconductor element, a liquid crystal display element, an imaging element, and a thin film magnetic head. Further, the present invention relates to a device manufacturing method for manufacturing the various devices.
- This type of exposure apparatus is provided with an illumination optical system that illuminates a mask such as a reticle or a photomask on which a predetermined pattern is formed with predetermined exposure light. Further, the exposure apparatus has a projection optical system that projects an image of a predetermined pattern onto a substrate (eg, a wafer or a glass plate) coated with a photosensitive material such as a photoresist by the illumination of the illumination optical system.
- illumination optical system and projection optical system include a plurality of optical elements such as lens elements and mirrors, and are housed in a lens barrel.
- An exposure apparatus is an extremely precise apparatus, and it is necessary to maintain a constant temperature inside the apparatus in order for each part of the exposure apparatus to exhibit desired performance.
- the exposure apparatus is installed in a clean room where the room temperature can be adjusted, and the air whose temperature is controlled in the clean room is introduced into the exposure apparatus, so that the temperature distribution in the exposure apparatus is made uniform. .
- the wavelength of exposure light has been shortened to meet the recent remarkable demand for finer circuit patterns.
- the absorption of the exposure light by the light-absorbing substance is larger than that of the exposure light of ultraviolet light such as i-ray. . Therefore, the energy of the exposure light may decrease significantly before the exposure light reaches the substrate from the light source.
- the transmittance of the exposure light is reduced due to the power of the energy of the exposure light itself or the fogging of the optical element, the throughput of the exposure apparatus is reduced and the product yield is reduced.
- a chemical filter capable of removing the light-absorbing substance is arranged inside the exposure apparatus.
- This chemical filter removes light-absorbing substances in the gas sent into the space including the optical path of the exposure light.
- an exposure apparatus has been developed that sends the air in the clean nozzle into the exposure apparatus while controlling the fluctuation width to the target temperature to be smaller. Is coming. Even if the temperature of the air supplied to the chemical filter is preliminarily adjusted so as to be kept substantially constant, the fluctuation range of the air sent into the exposure apparatus with respect to the target temperature is limited by the air. The problem of becoming larger before passing through a chemical filter has become apparent.
- the chemical filter has a property that the humidity of the chemical filter includes an amount of water that balances with the humidity of the gas. That is, the chemical filter has a property of containing more water as the humidity of the gas is higher. Therefore, when adjusting the temperature of air, if the temperature controller heats the air to lower the relative humidity, the chemical filter dissipates moisture and the latent heat of evaporation is removed from the chemical filter. As a result, the temperature of the air after passing through the chemical filter becomes lower than the temperature of the air before entering the chemical filter.
- the chemical filter when adjusting the temperature of the air, if the relative humidity rises by cooling the air with a cooler, the chemical filter is adsorbed so as to take in moisture and generates heat of adsorption. As a result, the temperature of the air after passing through the chemical filter is higher than the temperature of the air before entering the chemical filter. Qi temperature rises. As described above, even if the temperature of the air is adjusted to the predetermined temperature before passing through the chemical filter, the temperature of the air changes by passing through the chemical filter.
- the temperature in the clean nose is adjusted with high accuracy, but the humidity in the clean nose is often not sufficiently adjusted in its control width, control cycle, and the like. In order to accurately control the humidity inside a huge clean nome, a large capital investment is required.
- an environment control device is connected to the exposure apparatus to control the environment inside the exposure apparatus (for example, see Patent Document 1).
- a plurality of chemical filters capable of removing the light-absorbing substance and arranged along the direction of air flow are provided in the environment control device.
- the amount of water exchanged between the air and the chemical filter is smaller in the downstream of the air flow direction. Therefore, it is possible to maintain the temperature of the air, which has a small fluctuation range with respect to the target temperature of the air passing through the environment control device, at almost the target value.
- An object of the present invention is to provide a filter device capable of improving gas temperature stability while maintaining high impurity removal performance. Also, higher and more stable dew An object of the present invention is to provide an exposure apparatus capable of obtaining optical accuracy. Another object of the present invention is to provide a device manufacturing method capable of efficiently manufacturing a highly integrated device.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2002-158170 (Pages 7-18, FIG. 1)
- a filter device including a filter for removing impurities contained in a gas and a temperature adjusting device for adjusting the temperature of the gas to a predetermined temperature.
- the filter device includes a humidity adjustment device that is arranged on the upstream side of the filter and that adjusts the humidity of gas before passing through the filter.
- an exposure apparatus for transferring an image of a pattern formed on a mask onto a substrate.
- the exposure apparatus has a filter device for taking in the gas in the clean frame.
- the filter device includes a filter that removes impurities contained in the gas, a temperature adjustment device that adjusts the temperature of the gas to a predetermined temperature, and a humidity control device that is disposed on the upstream side of the filter and that does not pass through the filter. And a humidity adjusting device for adjusting the humidity.
- an exposure apparatus for transferring an image of a pattern formed on a mask onto a substrate, and a filter for taking in gas in a clean room and supplying the gas taken into the exposure apparatus
- An exposure system is provided.
- the filter device includes a filter for removing impurities contained in the gas, a temperature adjusting device for adjusting the temperature of the gas to a predetermined temperature, and a humidity adjusting device disposed upstream of the filter and for adjusting the humidity of the gas. including.
- a method for manufacturing a device including a lithographic process uses the exposure apparatus of the second aspect of the present invention.
- FIG. 1 is a schematic diagram showing a filter device and an exposure device according to a first embodiment of the present invention.
- FIG. 2 is a schematic diagram of the filter device of FIG. 1.
- FIG. 3 is a schematic diagram of the exposure apparatus of FIG. 1.
- FIG. 4 is a schematic diagram showing a filter device and an exposure device according to a second embodiment of the present invention.
- FIG. 5 is a flowchart showing a device manufacturing method using the exposure apparatus of the present invention.
- FIG. 6 is a flowchart showing a method for manufacturing a semiconductor device using the exposure apparatus of the present invention.
- exposure apparatus 10 is connected to filter apparatus 70 via ducts 90a and 90b.
- the ducts 90a and 90b are used to reduce the amount of contaminants, such as stainless steel (SUS) or fluororesin, which adhere to the surface of various optical elements and cause deterioration of the optical performance of those optical elements, and to use materials. Formed.
- the exposure device 10 and the filter device 70 are arranged in a clean room 95 that can be adjusted to a predetermined temperature.
- the exposure apparatus 10 includes an exposure light source 11, a beam 'matching' unit (hereinafter, referred to as “BMU”) 12, and a main chamber 13.
- the BMU 12 includes a plurality of optical elements, and the plurality of optical elements are housed in the BMU chamber 12a.
- the BMU 12 optically connects the exposure light source 11 to the main chamber 13, and the exposure light EL emitted from the exposure light source 11 is guided into the main chamber 13 via the BMU 12.
- the exposure light source 11 may be arranged in a clean room 95 or a utility room formed under the floor of the clean room 95.
- the exposure apparatus 10 transfers an image of a pattern formed on a reticle R functioning as a mask onto a wafer W as a substrate by irradiating exposure light EL inside the main chamber 13.
- a schematic configuration of the main body chamber 13 will be described.
- an exposure chamber 20 which forms an exposure space through which the exposure light EL passes, a reticle loader chamber 40, which accommodates a plurality of reticles R, and a wafer loader chamber, which accommodates a plurality of wafers W. 45 are defined.
- an illumination system barrel 21, a reticle chamber 22, a projection system barrel 23, and a wafer chamber 24 are arranged in the optical axis direction of the exposure light EL introduced through the BMU 12. It is arranged in order along.
- the illumination system barrel 21 houses an illumination optical system for illuminating the reticle R disposed in the optical path of the exposure light EL.
- This illumination optical system includes optical elements such as a fly-eye lens (which may be a rod integrator) 26, a mirror 27, and a condenser lens 28 which form an optical integration unit.
- the fly-eye lens 26 forms a large number of secondary light sources for illuminating the reticle R with a uniform illuminance distribution on the rear surface thereof when the exposure light EL from the exposure light source 11 is incident. Behind the fly-eye lens 26, a reticle blind 29 for shaping the shape of the exposure light EL is arranged.
- a disk-shaped parallel flat glass (not shown) that forms a part of the optical element of the illumination optical system is arranged.
- This parallel plate glass is formed of a material (synthetic quartz, fluorite, etc.) that transmits the exposure light EL.
- a projection for projecting an image of the pattern on the reticle R illuminated by the illumination optical system onto the wafer W arranged in the optical path of the exposure light EL is provided inside the projection system barrel 23.
- the optical system is housed.
- the projection optical system includes a pair of cover glasses (not shown) provided at the entrance and the exit of the exposure light EL in the projection system barrel 23, and a plurality of cover glasses (in this example) provided between the pair of cover glasses. (Only two are shown).
- the projection optical system converts the projected image of the circuit pattern on the reticle R, for example, reduced to 1/5 or 1/4, onto the wafer W on the surface of which a photoresist photosensitive to the exposure light EL is applied. Formed.
- a reticle stage RST is arranged inside the reticle chamber 22 .
- the reticle stage RST movably holds the reticle R on which a predetermined pattern is formed in a plane orthogonal to the optical axis of the exposure light EL.
- a movable mirror that reflects the laser beam from the reticle-side interferometer 33 is fixed to an end of the reticle stage RST.
- the position of the reticle stage RST in the running direction is constantly detected by the reticle-side interferometer 33, and the reticle stage RST is controlled to a predetermined position under the control of the control unit 15 that controls the overall operation of the exposure apparatus 10. Driven in the running direction.
- a wafer stage WST is arranged inside the wafer chamber 24 .
- a photoresist having photosensitivity to exposure light EL was applied.
- the wafer W is held so as to be movable in a plane orthogonal to the optical axis of the exposure light EL and to be finely movable along the optical axis of the exposure light EL.
- a movable mirror that reflects the laser beam from the wafer-side interferometer 34 is fixed to the end of the wafer stage WST, and the position of the wafer stage WST within the movable plane is determined by the wafer-side interferometer 34. Always detected.
- the wafer stage WST can move not only in the running direction but also in a direction perpendicular to the running direction under the control of the control unit 15. This configuration enables a step-and-scan operation in which scanning exposure is repeated for each shot area on the wafer W.
- the illumination area on the reticle R is rectangular (slit) by the reticle blind 29. Is formatted as This illumination area extends along a direction orthogonal to the running direction on the reticle R side.
- Vr the circuit pattern on the reticle R is sequentially illuminated from one end to the other end in a slit-shaped illumination area.
- the circuit pattern force on the reticle R in the illumination area is projected onto the wafer W via the projection optical system, and a projection area is formed.
- the wafer W Since the wafer W has an inverted image relationship with the reticle R, the wafer W is scanned at a predetermined speed Vw in a direction opposite to the scanning direction of the reticle R in synchronization with the scanning of the reticle R. By this scanning, the entire surface of the shot area of the wafer W is exposed.
- the scanning speed ratio Vw / Vr corresponds to the reduction magnification of the projection optical system, and the circuit pattern on the reticle R is accurately reduced and transferred onto each shot area on the wafer W.
- the reticle chamber 22 and the wafer chamber 24 are defined inside a main body column 36 housed in the exposure chamber 20.
- the main body column 36 holds the projection system lens barrel 23 such that one end thereof is exposed in the reticle chamber 22 and the other end is exposed in the wafer chamber 24.
- the main body column 36 is supported on a base plate 37 installed on the bottom surface of the exposure chamber 20 via a plurality of (only two are shown in FIG. 3) anti-vibration tables 38.
- a supply pipe 50 and a discharge pipe 51 are connected to each of the BMU room 12a, the illumination system barrel 21, and the projection system barrel 23.
- illumination system tube 21 and projection system tube 23 Is supplied through a supply pipe 50 from a tank 55 in a utility plant of a microdevice factory, which is an inert gas force which is an optically inert purge gas.
- the gas inside the BMU room 12a, the illumination system lens barrel 21, and the projection system lens barrel 23 is discharged to the outside of the factory via the discharge pipe 51.
- the inert gas is a single gas selected from nitrogen, helium, neon, argon, krypton, xenon, and radon, or a mixed gas thereof, and is chemically purified. .
- This purge gas is supplied to reduce the concentration of impurities such as water or organic compounds that contaminate various optical elements inside the BMU room 12a, the illumination system lens barrel 21, and the projection system lens barrel 23.
- impurities such as water or organic compounds that contaminate various optical elements inside the BMU room 12a, the illumination system lens barrel 21, and the projection system lens barrel 23.
- Moisture and organic compounds are substances that accumulate on the surface of various optical elements under irradiation of exposure light EL to cause a clouding phenomenon, and oxygen is a light-absorbing substance that absorbs a KrF excimer laser.
- the supply pipe 50 is provided with a purge gas filter 52 for removing impurities in the purge gas, and a temperature control dryer 53 for adjusting the temperature of the purge gas to a predetermined temperature and removing moisture in the purge gas. ing.
- the organic compound examples include an organic silicon compound, an ammonium salt, a sulfate, a volatile matter from a resist on the wafer W, and a slidability improving agent used for a component having various driving units.
- the supply pipe 50 and the discharge pipe 51 may be connected to the reticle chamber 22 to supply the purge gas into the reticle chamber 22.
- a reticle library 41 for storing a plurality of reticles R, and a horizontal multi-joint robot arranged closer to the exposure chamber 20 than the reticle library 41 are provided inside the reticle loader chamber 40.
- the reticle loader 42 is accommodated.
- the reticle loader 42 loads any one reticle R of the plurality of reticles R stored in the reticle library 41 onto the reticle stage RST, and reticles the reticle R on the reticle stage RST. Take it out to library 41.
- a bottom A closed type cassette (container) of a pun type may be used.
- the reticle loader 42 for example, a device having a mechanism for sliding a transfer arm may be used.
- the reticle library 41 may be provided in a compartment different from the reticle loader room 40. In this configuration, the above-described sealed cassette may be placed on the upper portion of the reticle loader chamber 40, and the reticle R may be carried into the reticle loader chamber 40 with the bottom open while airtightness is maintained.
- a wafer carrier 46 for storing a plurality of wafers W
- a horizontal articulated robot 47 for moving wafers W in and out of the wafer carrier 46
- a horizontal articulated robot for moving wafers W in and out of the wafer carrier 46
- a wafer transfer device 48 that transfers the wafer W between the wafer stage 47 and the wafer stage WST is accommodated.
- the wafer transfer device 48 may be omitted, and the wafer W may be transferred between the wafer carrier 46 and the wafer stage WST by the horizontal articulated robot 47. Further, the wafer carrier 46 may be provided in a compartment different from the wafer loader chamber 45.
- the guide passage 60 is branched into three on the way, and the branch portions 60a to 60c are connected to the corresponding chambers 20, 40, and 45, respectively.
- discharge passages 61 a to 61 c for guiding the gas inside the exposure chamber 20, the reticle loader chamber 40, and the wafer loader chamber 45 to the outside of the main body chamber 13.
- an introduction passage 62 for introducing the air in the clean room 95 from the filter device 70 into the wafer chamber 24 via the duct 90b is provided inside the main body chamber 13.
- the introduction passage 62 passes through the inside of the exposure chamber 20 and is connected to the main body column 36.
- a discharge passage 63 for guiding the gas inside the wafer chamber 24 to the outside of the main body chamber 13.
- a gas state such as an organic compound in the air introduced from the filter device 70 adheres to the surface of various optical elements and causes a decrease in optical performance of the optical elements.
- a chemical filter 65 for removing contaminants is provided.
- an optical element to which an organic substance adheres a specific optical element having a surface exposed to the inside of the main chamber 13 instead of various optical elements arranged in the optical path of exposure light is used. Attention may be paid to an element, in particular, an optical element facing the reticle or an optical element facing the wafer surface among a plurality of optical elements constituting the projection optical system.
- the chemical canolefinolate 65 also removes an alkaline substance that reacts with the photoresist (photosensitive material) applied on the wafer W.
- a photoresist called a chemically amplified type having excellent characteristics such as pattern formation characteristics and resolution is adopted.
- Chemically amplified photoresists generally consist of components such as resins, photosensitive acid generators, dissolution promoters or cross-linking agents, and the acid is generated from the acid generator upon exposure to light, and the acid is generated during baking (PEB) after exposure. Act as a catalyst to promote the reaction of the dissolution accelerator or cross-linking agent and form a pattern by development.
- Those using the dissolution promoter form a positive pattern, and those using the crosslinking agent form a negative pattern.
- Chemically amplified photoresists are excellent in terms of resolution, but if there is a gas such as ammoniaamine in the air between exposure and PEB, the generated acid will react and escape into the air, making it difficult for the photoresist surface. A solubilized layer is formed. When this hardly-solubilized layer is formed, the formed pattern becomes a T-shape having an “eave” at the top (called a “T-top phenomenon”), which greatly hinders subsequent steps such as etching. For this reason, it is desirable that the chemical filter 65 has a function of removing an alkaline substance such as ammoniaamine.
- gaseous contaminants and alkaline substances are collectively referred to as impurities in the air.
- any of a filter for removing a gaseous alkaline substance, a filter for removing a gaseous acidic substance, and a filter for removing a gaseous organic substance can be used.
- the chemical filter 65 include an activated carbon type (for removing gaseous organic substances) filter, an impregnated activated carbon type (for removing gaseous alkaline substances and gaseous acidic substances) filter, and an ion exchange fiber type (for removing gaseous acidic substances).
- Filter for removal of gaseous alkaline substances, removal of gaseous acidic substances), ion exchange resin type (for removal of gaseous alkaline substances, removal of gaseous acidic substances), ceramics type (for removal of gaseous organic substances), impregnating agent Ceramic type (Gaseous anole A filter for removing potassium substances and for removing gaseous acidic substances) can be used. Any of the above-described types may be used as the chemical filter 65 alone, or any combination thereof may be used.
- an upstream filter box 66 for removing fine particles (particles) in the air is provided at a connection portion of each branch portion 60a-60c with each of the chambers 20, 40, and 45. I have.
- This upstream filter box 66 is a ULPA filter (Ultra Low
- the upstream filter box 66 provided in the branch part 60a connected to the exposure chamber 20 is arranged so that the reticle R can be transported between the reticle loader chamber 40 and the reticle chamber 22.
- a downstream filter box 67 including a ULPA filter and a filter plenum is also provided at the junction of each of the discharge passages 61a 61c and the discharge passage 63, while removing particulates (partake nore) in the gas. .
- a chemical filter 65 for example, a chemical filter 65, a upstream filter box 66, and a flow direction of the forced air are arranged.
- a guide passage temperature sensor 68 for detecting the temperature of the air flowing through the guide passage 60 is provided upstream of the branching portions 60a-60c in the guide passage 60.
- a wafer chamber temperature sensor 69 for detecting the temperature of air introduced into the wafer chamber 24 is provided between the chemical filter 65 and the introduction passage 62 inside the wafer chamber 24. These two temperature sensors 68 and 69 are connected to the control unit 15, and a detection signal indicating the detected air temperature is input to the control unit 15.
- the filter device 70 adjusts the air in the clean room 95 to a predetermined temperature, removes impurities in the air, and supplies the air into the main chamber 13 of the exposure apparatus 10. I do.
- the filter device 70 has a device main body 71, and the device main body 71 has an intake port 72 for taking in the air in the clean room 95.
- a discharge port 73 for discharging the taken-in air is formed.
- the air in the clean room 95 is introduced into the main body 71 near the intake 72 of the main body 71.
- a fan motor 74 is provided for taking in the air and forcing the taken air downstream.
- a temperature adjusting device 76 for adjusting the temperature of the air taken in through the inlet 72 to a predetermined temperature.
- the temperature adjusting device 76 includes a device-side temperature sensor 77 that functions as a temperature detecting unit that detects the temperature of the intake air, and a temperature adjusting unit 78 that includes a cooler 78a and a heater 78b.
- the device-side temperature sensor 77 is disposed upstream of the cooler 78a and the heater 78b. More specifically, the device-side temperature sensor 77 is disposed upstream of the fan motor 74, and the cooler 78a and the heater 78b are disposed downstream of the fan motor 74.
- the cooler 78a is located upstream of the heater 78b.
- the cooler 78a may be arranged downstream of the heater 78b, or the cooler 78a and the heater 78b may be arranged at the same position in the air flow direction.
- the device-side temperature sensor 77, the cooler 78a, and the heater 78b are connected to the control unit 15.
- the control unit 15 controls the temperature of the air through the cooling by the cooler 78a and the heating by the heater 78b based on the detection result of the device-side temperature sensor 77 so that the air temperature matches the target value.
- the control unit 15 controls the temperature of the air passing through the temperature adjustment unit 78 so that the temperature is, for example, within a range of 20 to 30 ° C. and substantially constant (eg, 23 ° C.).
- a filter 80 for removing impurities in the air taken into the apparatus main body 71 is provided near the outlet 73 of the apparatus main body 71.
- the finoleter 80 includes a chemical filter 81 functioning as a filter material for removing impurities in the air, and a ULPA filter 82 for removing fine particles (particles) in the air.
- a chemical filter 81 functioning as a filter material for removing impurities in the air
- a ULPA filter 82 for removing fine particles (particles) in the air.
- three chemical filters 81 and one ULPA filter 82 are used.
- the chemical filter 81 is arranged on the upstream side of the ULPA filter 82 so that the air sequentially passes through the three chemical filters 81 and then passes through the ULPA filter 82.
- a chemical filter 81 is configured by combining the filter with a filter.
- the chemical filter 81 may be made of any material, similarly to the chemical filter 65 provided in the guide passage 60 of the exposure apparatus 10.
- the chemical filter 81 may be composed of those materials alone or in combination of any number of materials.
- the positions of the chemical filter 81 and the ULPA filter 82 are not limited to those shown in FIG. 2.
- the combination of the chemical filters 81 is arbitrarily selected according to the air taken into the filter device 70, that is, the impurities contained in the air in the clean room 95. It is preferable to determine the combination of the chemical filter 81 based on gas analysis of the air in the clean room 95 where the filter device 70 is installed.
- the inside of the apparatus main body 71 is provided with a humidity adjusting device 84 which is located upstream of the filters 80 and adjusts the humidity of the air before passing through the filters 80.
- the humidity adjustment device 84 includes a humidity adjustment unit 85, and an upstream humidity sensor 86 upstream of the humidity adjustment unit 85 and functioning as a first humidity detection unit that detects the humidity of the air. I have.
- the humidity adjustment device 84 also includes a downstream humidity sensor 87 that functions as a second humidity detection unit that detects the humidity of the air after passing through the humidity adjustment unit 85 and before passing through the filter 80. .
- the humidity adjustment unit 85 is disposed downstream of the temperature adjustment device 76, more specifically, between the temperature adjustment unit 78 of the temperature adjustment device 76 and the filter 80. Further, an upstream humidity sensor 86 is arranged between the temperature adjustment unit 78 and the humidity adjustment unit 85, and a downstream humidity sensor 87 is arranged between the humidity adjustment unit 85 and the filter 80.
- the humidity adjusting unit 85 has a humidifying function and a dehumidifying function.
- the upstream humidity sensor 86 and the downstream humidity sensor 87 detect the relative humidity of air.
- the humidity sensors 86 and 87 for example, an impedance / capacity change type, an electromagnetic wave absorption type, a heat conduction application type, and a quartz oscillation type sensor can be used according to the humidity measurement method.
- the humidity adjustment unit 85, the upstream humidity sensor 86, and the downstream humidity sensor 87 are It is connected to the control unit 15.
- the control unit 15 adjusts the humidification amount and the dehumidification amount in the humidity adjustment unit 85 based on the detection result of the upstream humidity sensor 86, and controls the humidity of the air so that the humidity of the air is maintained substantially constant.
- the relative humidity force S of the air after passing through the humidity adjusting section 85 and before passing through the filter 80 is 20%, preferably 40% to 60%, more preferably 45% to 55%. It is kept almost constant (for example, 50%) within the range.
- the downstream humidity sensor 87 monitors the humidity of the air adjusted by the humidity adjustment unit 85. Further, the control unit 15 may use the detection results of both the upstream humidity sensor 86 and the downstream humidity sensor 87 so that the humidity of the air is adjusted to be constant.
- Air conditioning in the exposure apparatus 10 connected to the filter device 70 configured as described above is performed, for example, as follows.
- the air in the clean room 95 is taken into the device main body 71 through the inlet 72 by the suction force of the fan motor.
- the taken-in air passes through the device-side temperature sensor 77, the temperature of the passing air is detected by the device-side temperature sensor 77, and a detection signal is input to the control unit 15. Then, the air that has passed through the device-side temperature sensor 77 is pumped downstream by the fan motor 74.
- the control unit 15 When the temperature of the air detected by the device-side temperature sensor 77 is higher than the target value, the control unit 15 operates the cooler 78a. Conversely, when the temperature of the air detected by the device-side temperature sensor 77 is lower than the target value, the control unit 15 operates the heater 78b. If the temperature of the air detected by the device-side temperature sensor 77 matches the target value, the control unit 15 does not operate either the cooler 78a or the heater 78b. Therefore, the temperature of the air pumped downstream by the fan motor 74 is adjusted to a predetermined temperature (target value) by passing the air through the temperature adjustment unit 78.
- target value predetermined temperature
- the control unit 15 When the air adjusted to a predetermined temperature passes through the upstream humidity sensor 86, the relative humidity of the passing air is detected by the upstream humidity sensor 86, and the relative humidity of the air is detected.
- the detected detection signal is input to the control unit 15.
- the control unit 15 activates the humidity adjustment unit 85 to humidify the air.
- Upstream humidity sensor 86 When the relative humidity of the air detected by the controller is higher than the target value, the control unit 15 operates the humidity adjustment unit 85 to dehumidify the air. When the relative humidity of the air detected by the upstream humidity sensor 86 matches the target value, the control unit 15 does not operate the humidity adjustment unit 85. Therefore, the temperature of the air passing through the upstream humidity sensor 86 is adjusted to a predetermined relative humidity (target value) by passing the air through the humidity adjusting unit 85.
- the downstream humidity sensor 87 detects the relative humidity of the passing air again and controls the detection signal. Entered in part 15. If the relative humidity of the air detected by the downstream humidity sensor 87 is lower than the target value, the control unit 15 continues to operate the humidity adjusting unit 85 to change the relative humidity of the air to a predetermined relative humidity ( Humidify the air to match the target value).
- the temperature and humidity of the air that has passed through the temperature adjustment unit 78 and the humidity adjustment unit 85 are adjusted such that both the temperature and the relative humidity substantially match the target values.
- air passes sequentially through the three chemical filters 81.
- the chemical cannole filter 81 almost completely removes and contaminates impurities (gaseous alkaline substances, gaseous acidic substances, and gaseous organic substances) in the air.
- the air that has passed through the chemical filter 81 then passes through the ULPA finoleta 82.
- the ULPA filter 82 almost completely adsorbs and removes fine particles (particles) in the air.
- the amount of air passing through the duct 90a is larger than the amount of air passing through the duct 90b.
- the amount of air passing through duct 90a is set to be four times the amount of air passing through duct 90b.
- the ratio between the amount of air passing through the duct 90a and the amount of air passing through the duct 90b can be appropriately changed according to, for example, the volume of the space to which air is supplied.
- the air introduced into the main chamber 13 through the duct 90a flows through the guide passage 60 into the exposure chamber 20, the reticle loader chamber 40, and the wafer loader chamber 45.
- air When air flows into each of the chambers 20, 40, and 45, air passes through the chemical filter 65 and the upstream filter bottom 66, so that impurities and fine particles (particles) in the air are more completely absorbed and removed. Is done.
- the control unit 15 When the air in the guide passage 60 passes through the guide passage temperature sensor 68, the temperature of the passing air is detected by the guide passage temperature sensor 68, and the detection signal is sent to the control unit 15. Will be entered. When the temperature of the air passing through the guide passage temperature sensor 68 is different from the target value, the control unit 15 operates the temperature adjusting device 76 of the filter device 70 to control the air passing through the filter device 70. Adjust the temperature.
- the temperatures in the chambers 20, 40, and 45 are constantly adjusted to be constant.
- the pressure in each of the chambers 20, 40, 45 is increased by the introduction of air, a part of the gas in each of the chambers 20, 40, 45 flows into the discharge passages 61a to 61c.
- the gas in the discharge passages 61a and 61c passes through the downstream filter box 67 and is discharged outside the main chamber 13, that is, into the clean room 95.
- the air introduced into the main chamber 13 through the duct 90b flows into the wafer chamber 24 through the introduction passage 62.
- the air passes through the chemical filter 65 and the upstream filter box 66, so that impurities and fine particles (particles) in the air are more completely absorbed and removed. Is done.
- the control unit 15 activates the temperature adjusting device 76 of the filter device 70 to control the temperature of the air passing through the filter device 70. To adjust.
- the filter device 70 includes driving components such as a fan motor 74, and the exposure device 10 includes driving components such as a reticle blind 29 ° reticle stage RST and a wafer stage WST.
- a sliding property improving agent is used in a sliding portion of these drive components.
- a substance in which generation of volatile substances for example, a fluorine-based grease is used as the slidability improving agent.
- the amount of volatile matter generated when about 10 mg of fluorine-based grease is heated at 60 ° C for 10 minutes in a nitrogen atmosphere is, for example, 150 xg / m 3 or less in terms of toluene.
- the amount of volatilized material generated in the heating conditions described above is, in toluene converted value 100 zg / m 3 or less it is desirable instrument 40 x gZm 3 It is more desirable that:
- As a grease of 40 zg / m 3 for example, Demnum (trade name) manufactured by Daikin is known.
- a humidity adjusting device 84 for adjusting the relative humidity of air before passing through the filter 80 is provided upstream of the filter 80.
- the humidity of the air passing through the filter device 70 is adjusted to a predetermined relative humidity (target value) by the humidity adjusting device 84, and the relative humidity fluctuation of the air is reduced. Therefore, when passing through the aerodynamic S filter 80, the amount of water transferred between the air and the filter 80 is reduced, and the generation of heat of adsorption or latent heat of evaporation due to the transfer of water is suppressed. . For this reason, in the air that has passed through the filter 80, the temperature stability of the air in which the temperature fluctuation width with respect to the target temperature is small can be improved.
- the humidity adjustment device 84 includes an upstream humidity sensor 86 that detects the relative humidity of air, and an air humidity sensor 86 based on the detection result of the upstream humidity sensor 86.
- an upstream humidity sensor 86 is arranged on the upstream side of the humidity adjustment unit 85.
- the relative humidity of the gas passing through the upstream humidity sensor 86 is higher than the target value, the relative humidity of the air matches the target value based on the detection result by the upstream humidity sensor 86.
- the humidity adjustment unit 85 quickly dehumidifies the air. For this reason, the adjustment accuracy of the relative humidity of air can be improved.
- a downstream humidity sensor 87 for detecting the relative humidity of the air after passing through the humidity adjusting unit 85 and before passing through the filter 80 is provided. I have.
- the relative humidity of the air after passing through the humidity adjustment unit 85 is detected by the downstream humidity sensor 87. If the relative humidity of the air is different from the target value based on the detection result of the downstream humidity sensor 87, the relative humidity of the air is quickly adjusted by the humidity adjusting unit 85. Therefore, the adjustment accuracy of the relative humidity of the air can be further improved.
- the humidity adjustment unit 85 is provided on the downstream side of the temperature adjustment device 76. After the temperature of the air passing through the filter device 70 is adjusted to the target temperature by the temperature adjusting device 76, the humidity of the air is adjusted to the target relative humidity by the humidity adjusting unit 85. As described above, since the relative humidity of the temperature-adjusted air is adjusted, the relative humidity can be easily adjusted.
- the temperature adjusting device 76 includes a device-side temperature sensor 77 for detecting the temperature of air, and a temperature And a temperature adjusting unit 78 for adjusting the temperature of the air.
- the device-side temperature sensor 77 is disposed upstream of the temperature adjustment unit 78. Therefore, the air inside the filter device 70 Before the air passes through the temperature adjustment unit 78, the temperature of the air is detected by the device-side temperature sensor 77. Then, when the air passes through the temperature adjusting section 78, the temperature of the air is adjusted based on the detection result by the device-side temperature sensor 77 so as to match the target value. For this reason, the accuracy of adjusting the temperature of the air can be improved.
- the filter 80 is provided with the chemical filter 81 capable of adsorbing and removing impurities in the air.
- the chemical filter 81 can suppress a decrease in the optical performance of various optical elements and a reaction of the resist applied on the wafer with ammoniaamine, thereby improving the exposure accuracy of the exposure apparatus 10. .
- the chemical filter 81 can efficiently remove extremely small amount of impurities mixed in the air in the clean room 95.
- the chemical filter 81 has a force that combines the activated carbon filter, the impregnated activated carbon filter, and the ion exchange resin filter, or It consists of a combination of an ion exchange fiber type (for removing gaseous acidic substances) filter and an ion exchange fiber type (for removing gaseous alkaline substances) filter. By such a combination, it is possible to remove various organic substances and alkali substances existing in the gaseous state in the air.
- These activated carbon type, impregnated activated carbon type, ion exchange resin type, and ion exchange fiber type chemical filters are relatively inexpensive and have a stable contaminant removal capability. It is suitable as the chemical filter 81 of FIG.
- the exposure apparatus 10 transfers the air that has passed through the filter apparatus 70 into the exposure chamber 20, the wafer chamber 24, the reticle loader chamber 40, and the wafer loader chamber 45 in the main body chamber 13. Supplying.
- each of the chambers 20, 24, 40, and 45 air adjusted to a substantially constant temperature (target temperature) while removing impurities and fine particles (particles) is supplied. Accordingly, the temperature fluctuation force S in each of the chambers 20, 24, 40, and 45 is extremely high / J, and the internal force S in each of the chambers 20, 24, 40, and 45 is accurately maintained at the target temperature. For this reason, measurement errors of reticle-side interferometer 33 and wafer-side interferometer 34 due to so-called air fluctuation (temperature fluctuation) are suppressed, and position control of reticle stage RST and wafer stage WST can be performed with high accuracy. This result As a result, in the exposure apparatus 10, stable exposure accuracy can be obtained.
- the concentration of impurities and fine particles (particles) in each of the chambers 20, 24, 40, and 45 can be kept low, the exposure accuracy of the exposure apparatus 10 can be improved, and even if a fine pattern is formed. Exposure can be performed with high accuracy.
- the filter device 70 is connected to the main chamber 13 via the ducts 90a and 90b. With this configuration, there is no need to manufacture the exposure apparatus 10 in which the filter device 70 is integrated in advance. If the filter device 70 is connected to the main body chamber 13 of the exposure apparatus 10 through the ducts 90a and 90b, the air whose impurities have been removed and adjusted to a predetermined temperature can be supplied to the inside of the exposure apparatus 10. Can be. Therefore, the versatility of the exposure device 10 can be improved. Further, the temperature fluctuation of the air in the exposure apparatus 10 can be suppressed, and the temperature in the exposure apparatus 10 can be maintained at a substantially desired temperature.
- the configuration in which the air in the clean nozzle 95 is introduced into the main body chamber 13 through the filter device 70 and the ducts 90a and 90b has been described.
- the filter device 70 of the present invention is applied to the exposure apparatus 10 including the main body chamber 13 and the mechanical chamber 100 provided adjacent to the main body chamber 13 will be described with reference to FIG. This will be described with reference to FIG.
- a machine room side air intake 102 for taking in air from the filter device 70 is formed below the machine room main body 101 side of the machine room 100.
- the machine room side air inlet 102 is connected to the outlet 73 of the filter device 70 via a duct 90c.
- a cooler (dry coil) 103 is provided inside the machine room main body 101 at a position slightly below the center in the height direction.
- a machine room temperature sensor 104 for detecting the temperature of the cooler surface is arranged. The detection value of the machine room temperature sensor 104 is supplied to the control unit 15.
- a drain pan 103a is arranged below the cooler 103.
- the inside of the machine room main body 101 is located at a predetermined distance above the cooler 103.
- a first heater 105 is disposed on the first heater 105, and a first blower 106 is disposed above the first heater 105.
- a machine room side first discharge port 107 is formed at a position corresponding to the air outlet of the first blower 106.
- the first exhaust port 107 on the machine room side is connected to the entrance of the guide passage 60 of the exposure apparatus 10 by an extendable bellows-like guide passage side duct 108.
- the air that has passed through the first blower 106 is guided to the guide passage 60 of the exposure apparatus 10 via the guide passage side duct 108.
- a machine room side second discharge port 109 is formed at a position corresponding to a position between the cooler 103 and the first heater 105.
- the second discharge port 109 on the machine room side is connected to the inlet of the introduction passage 62 of the exposure apparatus 10 by an extendable bellows-like introduction passage side duct 110.
- Part of the air that has passed through the cooler 103 is guided to the introduction passage 62 of the exposure apparatus 10 through the introduction passage duct 110.
- the flow rate of the air passing through the introduction passage side duct 110 is set to about 1Z5 of the flow rate of the air passing through the cooler 103.
- a second heater 97 and a second blower 98 disposed downstream of the second heater 97 are provided.
- the second heater 97, the cooler 103 of the machine room 100, and the first heater 105 are connected to the control unit 15.
- the downstream ends of the discharge passages 61a-61c and the return passage 64 of the exposure apparatus 10 are connected to the vicinity of the air intake port 102 in the machine room main body 101.
- a return air inlet 111 is formed in the machine room main body 101 at a position corresponding to the connection between the discharge passages 61a-61c and the return passage 64.
- two chemical filters 112 are provided so as to cover the air intake port 102 and the return air intake port 111, respectively.
- These chemical filters 112 may be made of any material, similarly to the chemical filter 81 provided in the filter device 70.
- the chemical filter 81 can be configured by using these materials alone or in combination of any number of materials.
- the finoletor device 70 is attached to the exposure device 10 including the main body chamber 13 and the machine room 100. In this way, the air in the clean room 95 taken from the air intake 102 of the machine room 100 is sent into the main body chamber 13 through the machine room 100.
- the filter device 70 can also be applied to the exposure device 10. Therefore, it is possible to attach the filter device 70 of the present invention to an exposure device already installed in a semiconductor factory.
- a humidity adjustment device having the same configuration as the humidity adjustment device 84 provided in the filter device 70 may be provided in the machine room 100 in the second embodiment.
- the amount of air to be subjected to humidity control is different from that in the case where the humidity is adjusted by the filter device 70.
- the humidity controller provided in the machine room 100 controls the humidity of the air
- the power for the control may increase and the humidity controller may become larger.
- the accuracy of humidity control may be reduced.
- the filter device 70 is attached to the air intake port 102 of the machine room 100 via a duct 90c, etc.
- the size of the temperature control device can be reduced, and the humidity control can be performed with high accuracy.
- At least one of the cooler 103 of the machine room 100, the first heater 105, and the second heater 97 of the exposure apparatus 10 may be omitted.
- the filter device 70 may be provided integrally with the exposure device 10.
- the apparatus main body 71 and the ducts 90a to 90c can be omitted, and the number of components constituting the exposure apparatus 10 can be reduced.
- the heater 78b of the filter device 70 may be omitted.
- At least one of a dehumidifying device for dehumidifying air flowing through the filter device 70 and a humidifying device for humidifying air is provided as the humidity adjusting unit 85 in the filter device 70. May be.
- the upstream humidity sensor 86 of the filter device 70 is It may be arranged on the upstream side of the adjusting unit 78, for example, at a position corresponding to the device-side temperature sensor 77. Further, the downstream humidity sensor 87 may be omitted.
- a temperature and humidity sensor capable of detecting both the temperature and humidity of air may be used instead of the device-side temperature sensor 77 and the humidity sensors 86 and 87 of the filter device 70.
- the humidity sensors 86 and 87 are not limited to those detecting the relative humidity of air. These humidity sensors 86 and 87 may be sensors that detect, for example, absolute humidity of air, wet bulb temperature or dew point temperature. The humidity sensors 86 and 87 may be sensors that detect the ratio between the partial pressure of water vapor and the partial pressure of air (volume ratio) or the ratio between the weight of steam and the weight of air (weight ratio). ,.
- the filter device 70 adjusts the temperature and humidity of the air flowing through the inside.
- the filter device 70 may be configured such that the pressure in the main chamber 13 (the amount of air blown to the main chamber 13) can be adjusted in addition to the temperature and the humidity.
- the filter device 70 is not limited to a device that supplies air into the main body chamber 13 of the exposure device 10.
- the filter device of the present invention may supply a gas other than air, such as a purge gas, into the main chamber 13 of the exposure apparatus 10.
- the filter device may be connected to, for example, the supply pipe 50 connected to the BMU room 12a of the exposure device 10, the illumination system lens barrel 21, and the projection system lens barrel 23.
- a dryer for removing the moisture in the purge gas discharged from the filter device be provided downstream of the filter device in the supply pipe 50.
- a HEPA filter High Efficiently Particulate Air-filter
- the thickness and packing density of the chemical filter 81 of the filter device 70, the chemical filter 65 of the exposure device 10, the chemical filter of the upstream filter box 66, and the chemical filter 112 of the machine room 100 Is optional.
- the amount of water exchanged between each chemical filter and the air passing through the chemical filter is such that each chemical filter becomes smaller as it approaches the main body column 36 of the exposure apparatus 10.
- the thickness and / or packing density of the filter may be varied. In this case, for example, the body chamber
- Each of the chemical filters may be configured such that the thickness and / or the packing density increase in the order of the chemical filter in the chemical filter 13, the chemical filter in the machine room main body 101, and the chemical filter in the apparatus main body 71.
- the first filter device that supplies air into the guide passage 60 of the exposure device 10 and the second filter device that introduces air into the introduction passage 62 of the exposure device 10 A filter device may be connected. In this way, the state of the air flowing through the guide passage 60 (temperature and humidity) and the state of the air flowing through the introduction passage 62 (temperature and humidity) can be individually adjusted.
- the liquid is discharged to the outside of the main body chamber 13 via the discharge passages 61a to 61c, the discharge passage 63 (first embodiment), and the return passage 64 (second embodiment) of the exposure apparatus 10.
- the exposing device 10 and the filter device 70 may be configured so that at least a part of the air that has flowed directly flows into the filter device 70. That is, a part of the air in main body chamber 13 may circulate inside main body chamber 13 and inside filter device 70. In this case, a duct is provided for connecting the air discharge portion of the main body chamber 13 to the filter device 70.
- SUS stainless steel
- fluororesin that generates a small amount of contaminants that adhere to the surface of various optical elements and cause deterioration of the optical performance of those optical elements.
- the exposure apparatus 10 is not limited to an apparatus having the main body column 36 in the main body chamber 13.
- the exposure apparatus 10 may be, for example, an apparatus in which a reticle chamber 22 and a wafer chamber 24 are formed in different chambers, and a projection system barrel 23 is arranged between the chambers.
- the projection optical system is not limited to the refraction type, but may be a catadioptric type or a reflection type.
- an exposure apparatus that does not have a projection optical system for example, a contact exposure apparatus that transfers a mask pattern to a substrate by bringing a mask and a substrate into close contact, and transfers a mask pattern to a substrate by bringing a mask and a substrate close together
- the present invention can be similarly applied to a proximity exposure apparatus.
- the exposure apparatus of the present invention is not limited to a reduction exposure type exposure apparatus.
- An exposure apparatus of a 1: 1 exposure type or an enlarged exposure type may be used.
- an exposure apparatus using DUV (deep ultraviolet) or VUV (vacuum ultraviolet) light generally uses a transmissive reticle, and the reticle substrate is quartz glass, fluorine-doped quartz glass, fluorite, magnesium fluoride. Or quartz or the like is used.
- a transmission type mask stencil mask, memrene mask
- a silicon wafer is used as a mask substrate.
- the present invention can be similarly applied not only to an exposure apparatus used for manufacturing a semiconductor element but also to an exposure apparatus as described below.
- the present invention can be applied to an exposure apparatus used for manufacturing a display including a liquid crystal display element (LCD) and transferring a device pattern onto a glass plate.
- the present invention can be applied to an exposure apparatus used for manufacturing a thin film magnetic head or the like and transferring a device pattern to a ceramic wafer.
- the present invention can also be applied to an exposure apparatus used for manufacturing a CCD image sensor.
- the present invention is also applied to a step-and-repeat batch exposure type exposure apparatus in which a mask pattern is transferred to a substrate while the mask and the substrate are stationary, and the substrate is sequentially moved in steps. Can be.
- a single-wavelength laser in the infrared or visible range oscillated from a DFB semiconductor laser or fiber laser is amplified by a fiber amplifier doped with, for example, erbium and erbium and ytterbium, and amplified.
- a harmonic obtained by converting the wavelength of the laser light into ultraviolet light using a nonlinear optical crystal may be used as a light source.
- the exposure apparatus 10 of the embodiment is manufactured, for example, as follows. First, a plurality of lens elements 31 and a cover glass constituting the projection optical system are housed in the projection system barrel 23. An illumination optical system including optical members such as a mirror 27 and lenses 26 and 28 is housed in the illumination system barrel 21. Then, the illumination optical system and the projection optical system are incorporated in the main chamber 13 to perform optical adjustment. Next, a wafer stage WST (including a reticle stage RST in the case of a scan type exposure apparatus) including a large number of mechanical parts is attached to the main chamber 13 and wiring is connected.
- a wafer stage WST including a reticle stage RST in the case of a scan type exposure apparatus
- the components constituting the lens barrels 21 and 23 are assembled after removing impurities such as processing oil and metal substances by, for example, ultrasonic cleaning. It is desirable to manufacture the exposure apparatus 10 in a clean room in which the temperature, humidity, and pressure are controlled and the degree of cleanliness is adjusted.
- FIG. 5 is a flowchart showing an example of manufacturing a device (for example, a semiconductor device such as an IC or an LSI, a liquid crystal display device, an imaging device (for example, a CCD), a thin-film magnetic head, and a micromachine).
- a device for example, a semiconductor device such as an IC or an LSI, a liquid crystal display device, an imaging device (for example, a CCD), a thin-film magnetic head, and a micromachine).
- step S101 design step
- a function and performance design of a device for example, a circuit design of a semiconductor device
- a pattern for realizing the function is formed.
- step S102 mask manufacturing step
- step S103 substrate manufacturing step
- a substrate is manufactured using materials such as silicon and a glass plate (when a silicon material is used, a wafer W is manufactured).
- step S104 substrate processing step
- step S105 device assembly step
- step S105 Multiple steps, such as ising, bonding, and packaging steps (such as chip encapsulation), are included as needed.
- step S106 inspection step
- inspections such as an operation check test and a durability test of the device manufactured in step S105 are performed. After these steps, the device is completed and shipped.
- FIG. 6 is a flowchart showing details of an example of step S104 in FIG. 5 in the case of a semiconductor device.
- step S111 oxidation step
- step S112 CVD step
- step S113 electrode forming step
- step S114 ion implantation step
- ions are implanted into the wafer W.
- the post-processing step is executed as follows.
- a photosensitive agent is applied to the wafer W in step S115 (resist forming step).
- step S116 exposure step
- the circuit pattern of the mask reticle R
- step S118 etching step
- steps of the wafer W other than the portion where the resist remains are removed by etching.
- step S119 resist removing step
- the resolution can be improved by the exposure light EL in the vacuum ultraviolet region, and the exposure amount can be controlled with high precision. Therefore, the exposure accuracy can be improved, and a highly integrated device having a minimum line width of about 0.1 zm can be manufactured with high yield.
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- Environmental & Geological Engineering (AREA)
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- General Physics & Mathematics (AREA)
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Abstract
Description
Claims
Priority Applications (2)
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JP2005506764A JP4816080B2 (ja) | 2003-06-03 | 2004-06-02 | フィルタ装置及び露光システム並びにデバイスの製造方法 |
US11/292,491 US7416574B2 (en) | 2003-06-03 | 2005-12-02 | Filter apparatus, exposure apparatus, and device-producing method |
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JP2003-158643 | 2003-06-03 | ||
JP2003158643 | 2003-06-03 |
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US11/292,491 Continuation US7416574B2 (en) | 2003-06-03 | 2005-12-02 | Filter apparatus, exposure apparatus, and device-producing method |
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PL3394519T3 (pl) | 2015-12-24 | 2020-08-24 | Koninklijke Philips N.V. | Oczyszczacz powietrza z rozszerzonym roboczym zakresem wilgotności |
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JP7018368B2 (ja) * | 2018-07-12 | 2022-02-10 | 東京エレクトロン株式会社 | 検査装置及び検査装置の清浄化方法 |
WO2019172736A2 (ko) * | 2019-07-09 | 2019-09-12 | 엘지전자 주식회사 | 필터의 교체시기 판단 방법 및 필터의 교체시기를 판단하는 공기 조화기 |
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EP1681595A2 (en) * | 2005-01-13 | 2006-07-19 | NEC Electronics Corporation | Exposure apparatus |
JP2006196632A (ja) * | 2005-01-13 | 2006-07-27 | Nec Electronics Corp | 露光装置 |
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JP2006286709A (ja) * | 2005-03-31 | 2006-10-19 | Toppan Printing Co Ltd | 露光装置及び露光装置を用いたフォトレジストパターン形成方法 |
WO2011059056A1 (ja) * | 2009-11-12 | 2011-05-19 | 株式会社ニコン | フィルタ保持装置、露光装置、及びデバイス製造方法 |
WO2011059055A1 (ja) * | 2009-11-12 | 2011-05-19 | 株式会社ニコン | フィルタ装置、フィルタの収容方法、露光装置、及びデバイス製造方法 |
WO2011059057A1 (ja) * | 2009-11-12 | 2011-05-19 | 株式会社ニコン | フィルタボックス、露光装置、及びデバイス製造方法 |
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CN110801678A (zh) * | 2019-11-19 | 2020-02-18 | 杭州小橙工业设计有限公司 | 一种重污染废气净化用仿蒲公英自脱落式过滤装置 |
Also Published As
Publication number | Publication date |
---|---|
US20060156927A1 (en) | 2006-07-20 |
US7416574B2 (en) | 2008-08-26 |
JPWO2004108252A1 (ja) | 2006-07-20 |
JP4816080B2 (ja) | 2011-11-16 |
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