WO2003080525A1 - Element de verre de quartz synthetique et procede de production de celui-ci - Google Patents
Element de verre de quartz synthetique et procede de production de celui-ci Download PDFInfo
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- WO2003080525A1 WO2003080525A1 PCT/JP2003/003618 JP0303618W WO03080525A1 WO 2003080525 A1 WO2003080525 A1 WO 2003080525A1 JP 0303618 W JP0303618 W JP 0303618W WO 03080525 A1 WO03080525 A1 WO 03080525A1
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- WO
- WIPO (PCT)
- Prior art keywords
- quartz glass
- synthetic quartz
- glass member
- laser
- light
- Prior art date
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 122
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000008569 process Effects 0.000 title claims abstract description 8
- 238000001069 Raman spectroscopy Methods 0.000 claims abstract description 51
- 238000005056 compaction Methods 0.000 claims abstract description 39
- 239000000463 material Substances 0.000 claims abstract description 27
- 230000007423 decrease Effects 0.000 claims abstract description 20
- 230000003287 optical effect Effects 0.000 claims description 68
- 238000010521 absorption reaction Methods 0.000 claims description 34
- 238000002834 transmittance Methods 0.000 claims description 25
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 22
- 239000001257 hydrogen Substances 0.000 claims description 19
- 229910052739 hydrogen Inorganic materials 0.000 claims description 19
- 238000004519 manufacturing process Methods 0.000 claims description 18
- 239000000758 substrate Substances 0.000 claims description 18
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 16
- 238000005286 illumination Methods 0.000 claims description 15
- 230000009467 reduction Effects 0.000 claims description 15
- 229910052731 fluorine Inorganic materials 0.000 claims description 13
- 230000001678 irradiating effect Effects 0.000 claims description 13
- 238000001228 spectrum Methods 0.000 claims description 10
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 9
- 239000011737 fluorine Substances 0.000 claims description 9
- 238000012545 processing Methods 0.000 claims description 6
- 230000001965 increasing effect Effects 0.000 claims description 5
- 238000005070 sampling Methods 0.000 claims description 4
- 241000219977 Vigna Species 0.000 claims 1
- 235000010726 Vigna sinensis Nutrition 0.000 claims 1
- 230000003247 decreasing effect Effects 0.000 abstract description 5
- 230000005855 radiation Effects 0.000 abstract 3
- 230000008878 coupling Effects 0.000 description 18
- 238000010168 coupling process Methods 0.000 description 18
- 238000005859 coupling reaction Methods 0.000 description 18
- 230000000052 comparative effect Effects 0.000 description 17
- 230000008859 change Effects 0.000 description 14
- 230000015572 biosynthetic process Effects 0.000 description 10
- 238000003786 synthesis reaction Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 9
- 238000005259 measurement Methods 0.000 description 9
- 239000002994 raw material Substances 0.000 description 9
- 238000009826 distribution Methods 0.000 description 8
- 125000004429 atom Chemical group 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 7
- 239000011521 glass Substances 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- 230000005284 excitation Effects 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 230000006866 deterioration Effects 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 238000004566 IR spectroscopy Methods 0.000 description 4
- 229910004298 SiO 2 Inorganic materials 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 230000000704 physical effect Effects 0.000 description 4
- VXEGSRKPIUDPQT-UHFFFAOYSA-N 4-[4-(4-methoxyphenyl)piperazin-1-yl]aniline Chemical compound C1=CC(OC)=CC=C1N1CCN(C=2C=CC(N)=CC=2)CC1 VXEGSRKPIUDPQT-UHFFFAOYSA-N 0.000 description 3
- 238000000862 absorption spectrum Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 230000010354 integration Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000005049 silicon tetrachloride Substances 0.000 description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- 229910008045 Si-Si Inorganic materials 0.000 description 2
- 229910020175 SiOH Inorganic materials 0.000 description 2
- 229910006411 Si—Si Inorganic materials 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000000875 corresponding effect Effects 0.000 description 2
- 229910001882 dioxygen Inorganic materials 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000001459 lithography Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 238000001237 Raman spectrum Methods 0.000 description 1
- 102100023185 Transcriptional repressor scratch 1 Human genes 0.000 description 1
- 101710171414 Transcriptional repressor scratch 1 Proteins 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000009614 chemical analysis method Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000005304 optical glass Substances 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 238000006303 photolysis reaction Methods 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 230000015843 photosynthesis, light reaction Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- ABTOQLMXBSRXSM-UHFFFAOYSA-N silicon tetrafluoride Chemical compound F[Si](F)(F)F ABTOQLMXBSRXSM-UHFFFAOYSA-N 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/06—Glass compositions containing silica with more than 90% silica by weight, e.g. quartz
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B19/00—Other methods of shaping glass
- C03B19/14—Other methods of shaping glass by gas- or vapour- phase reaction processes
- C03B19/1469—Means for changing or stabilising the shape or form of the shaped article or deposit
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C23/00—Other surface treatment of glass not in the form of fibres or filaments
- C03C23/0005—Other surface treatment of glass not in the form of fibres or filaments by irradiation
- C03C23/002—Other surface treatment of glass not in the form of fibres or filaments by irradiation by ultraviolet light
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C23/00—Other surface treatment of glass not in the form of fibres or filaments
- C03C23/0005—Other surface treatment of glass not in the form of fibres or filaments by irradiation
- C03C23/0025—Other surface treatment of glass not in the form of fibres or filaments by irradiation by a laser beam
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2201/00—Type of glass produced
- C03B2201/06—Doped silica-based glasses
- C03B2201/08—Doped silica-based glasses doped with boron or fluorine or other refractive index decreasing dopant
- C03B2201/12—Doped silica-based glasses doped with boron or fluorine or other refractive index decreasing dopant doped with fluorine
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2201/00—Type of glass produced
- C03B2201/06—Doped silica-based glasses
- C03B2201/20—Doped silica-based glasses doped with non-metals other than boron or fluorine
- C03B2201/21—Doped silica-based glasses doped with non-metals other than boron or fluorine doped with molecular hydrogen
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2201/00—Type of glass produced
- C03B2201/06—Doped silica-based glasses
- C03B2201/20—Doped silica-based glasses doped with non-metals other than boron or fluorine
- C03B2201/23—Doped silica-based glasses doped with non-metals other than boron or fluorine doped with hydroxyl groups
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2201/00—Glass compositions
- C03C2201/06—Doped silica-based glasses
- C03C2201/08—Doped silica-based glasses containing boron or halide
- C03C2201/12—Doped silica-based glasses containing boron or halide containing fluorine
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2201/00—Glass compositions
- C03C2201/06—Doped silica-based glasses
- C03C2201/20—Doped silica-based glasses containing non-metals other than boron or halide
- C03C2201/21—Doped silica-based glasses containing non-metals other than boron or halide containing molecular hydrogen
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2201/00—Glass compositions
- C03C2201/06—Doped silica-based glasses
- C03C2201/20—Doped silica-based glasses containing non-metals other than boron or halide
- C03C2201/23—Doped silica-based glasses containing non-metals other than boron or halide containing hydroxyl groups
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
Definitions
- the present invention relates to a synthetic quartz glass member such as a lens prism for an ultraviolet laser used in excimer laser lithography or a reticle (photomask) substrate as an original of a circuit pattern of an integrated circuit, and a method of manufacturing the same.
- a synthetic quartz glass member such as a lens prism for an ultraviolet laser used in excimer laser lithography or a reticle (photomask) substrate as an original of a circuit pattern of an integrated circuit, and a method of manufacturing the same.
- reduction projection exposure equipment (or optical lithography equipment) is mainly used.
- the projection optical system incorporated in this device is required to secure a wide exposure area with the increase in integration of the integrated circuit, and is required to have a higher resolution over the entire exposure area.
- NA numerical aperture
- the KrF (248 nm) excimer laser which is currently mainly used as a light source for semiconductor lithography equipment, has been changed to the vacuum ultraviolet light source ArF (193 ⁇ m) excimer laser. Shorter wavelengths are being promoted.
- F 2 (157 nm) lasers are currently being studied.
- reduced (or oxygen-deficient) defect structures typified by Si—Si bonds are introduced during the manufacturing process, and these become precursors to the laser. It has been reported that the optical properties are degraded by one irradiation. For example, the Si-Si bond is photolyzed to generate an E 'center (S i ⁇ (“ ⁇ ” means a lone electron)). Since the center of E 'forms an optical absorption band at 215 nm near the laser wavelength, the transmission characteristic of the quartz glass member is significantly reduced.
- 7-291644 discloses that when the variation of the absorption coefficient at 215 nm corresponding to the number of irradiation pulses when irradiating a laser is constant regardless of the repetition frequency of the laser, Judged that it was a quartz glass member with laser resistance that hardly generates the E 'center, and decided to use it in an optical system for a high-power pulse laser used in a specific wavelength region of 400 nm or less.
- the concentration of Na contained in quartz glass is set to 2 Owt.ppm or less, and the transmittance is increased in a vacuum ultraviolet region having a wavelength of 220 nm or less.
- OPTICS LE ⁇ ERS Vol. 24, No. 13 suggests a change in the amount of strained bond from a change in the spectrum of H 2 and SiO 2 , but a more direct view of the physical properties of quartz glass itself. We are not observing the change. Therefore, A r F (193 nm) and F 2 (157 nm) accurate for determining a quartz glass having a high resistance to vacuum ultraviolet laser first light, such as by direct and simple method is desired I have. Disclosure of the invention
- a first object of the present invention is to provide a synthetic quartz glass member having excellent laser resistance used in a vacuum ultraviolet exposure apparatus and a method for producing the same.
- a second object of the present invention is to provide a synthetic quartz glass member having less distortion coupling used as an imaging optical system lens member for a vacuum ultraviolet exposure apparatus and a reticle (mask) substrate.
- a third object of the present invention is to provide an optical member capable of maintaining a good transmittance for a long period even when a high energy vacuum ultraviolet light source such as an ArF laser is used.
- An object of the present invention is to provide an exposure apparatus provided with such an illumination optical system or a projection optical system.
- a synthetic quartz glass member to which vacuum ultraviolet light is applied which is synthesized when one F 2 laser beam having a fluence of 10 mJ / cm 2 is irradiated with 2 ⁇ 10 6 pulses.
- a synthetic quartz glass member characterized in that the increase in OH groups contained in the quartz glass member is less than 1 OOwt.ppm and the compaction is 2 ppm or less.
- strain coupling In order to estimate the amount of distorted S i -0-S bonds (hereinafter, also referred to as “strain coupling” as appropriate) existing in quartz glass in a relatively short time, the present inventors have proposed a method of performing strain coupling in a one-photon absorption process.
- good quartz glass is selected by measuring the increase in the OH group by irradiating a F 2 laser beam, a quartz glass member is manufactured of vacuum ultraviolet external, such as such lenses Ya reticle quartz glass Is done. Further, the present inventor, when the first requirement is satisfied, satisfies the second requirement that the compaction is within a predetermined range even when irradiating two lasers under the above conditions.
- strain coupling is an energetically unstable bond structure, and the average of the distorted S i— 0— S i bond angles with F 2 laser irradiation It is considered that the value becomes a more stable and small angle, and appears as a physical property called a change in compaction.
- compaction means a high refractive index of quartz glass. the optical path length difference between the portion not irradiated with the portion irradiated with F 2 laser first light measured using a laser interferometer, expressed the optical path length difference as a value divided by the sample thickness. If the compaction is less than 2 ppm, it can be a quartz glass member with excellent laser resistance due to low strain coupling.
- the compaction is preferably at most 1.8 ppm, particularly preferably at most 1 ppm.
- Quartz glass member having a first and second requirements since characteristic degradation of the reduced transmittance or the like to A r F and F 2 the vacuum ultraviolet light such as a laser one is surely suppressed, so It is suitable for an optical system of an exposure apparatus using a vacuum ultraviolet light as a light source.
- the increase in the 0 H group can be determined by infrared spectroscopy or Raman spectroscopy. For example, the integral of the infrared absorption band based on the 0 H stretching vibration after irradiating one F 2 laser beam under the above conditions is Obtained by observing the increase in intensity.
- the change in the integrated intensity of the infrared absorption band of Si ⁇ H appearing around 3660 cm- 1 is less than 10%
- the increase of the 0H group may be less than 1 Owt. Ppm.
- the amount of OH groups obtained by such a method that is, the amount of strain bonding strongly correlated with the laser resistance of quartz glass.
- a synthetic quartz glass member irradiated with vacuum ultraviolet light is irradiated with 2 ⁇ 10 6 pulses of F 2 laser light having a fluence of 10 mJ / cm 2
- a synthetic quartz glass member in which the reduction of H 2 molecules contained in the synthetic quartz glass member is less than 1 ⁇ 10 ia / Zcm 3 and the compaction is 2 ppm or less.
- the third requirement that the number of H 2 molecules dissolved in quartz glass after irradiation with one F 2 laser beam under the above conditions is less than 1 x 10 18 Zcm 3 is that the strain coupling is expressed by the above equation (2) It is derived from reacting according to That is, when strain coupling exists in quartz glass, the amount of H 2 decreases by reacting with H 2 in quartz glass under the light of an F 2 laser. For this reason, when the decrease in H 2 molecules is as small as less than 1 ⁇ 10 18 particles / cm 3 even when irradiated with F 2 laser light, it can be seen that strain coupling was originally small in the quartz glass. Therefore, a good quartz glass is selected by measuring the decrease of H 2 molecules after irradiating the F 2 laser beam.
- the present inventor sets a second requirement that the compaction of quartz glass be 2 ppm or less after irradiating one light beam of the F 2 laser under the above conditions when the third requirement is satisfied. We found that we almost satisfied. This is considered to appear as a physical characteristic of a change in the refractive index because the coupling angle of the strain coupling becomes small. Quartz glass member having a second and third requirement, has durability against vacuum ultraviolet light such as A r F or F 2 laser.
- Raman in the present invention reduction of the H 2 molecule, can be obtained from infrared spectroscopy or Raman spectroscopy, for example, when irradiated with F 2, single The first light under the above conditions, based on the stretching vibration of H 2 molecules Obtained by observing the scattering peak.
- Raman scattering peak based in H 2 stretching vibration near-dated 4140 CRRT 1 in order to clearly change by F 2 laser first light irradiation, decrease in the integrated intensity of this peak is less than 80%, obviously the Do ivy by reduction of H 2 molecules 1 X 1 0 18 atoms / cm may correspond to less than 3 inventor's experiments.
- the synthetic quartz glass member of the present invention in order to improve laser resistance in a vacuum ultraviolet region, the synthetic quartz glass member preferably contains hydrogen at a hydrogen molecule concentration of 2 ⁇ 10 17 atoms / cm 3 or more. preferable.
- the synthetic quartz glass member of the present invention may contain OH groups from 500 wt. Ppm to 1300 wt. The OH group moderately lowers the glass viscosity and reduces the structural load on the Si—0—Si bond, so if the 0H group is contained in the above concentration range, the occurrence of the strain bond is suppressed. be able to.
- the synthetic quartz glass member of the present invention preferably contains fluorine at 300 wt. Ppm or more.
- the synthetic quartz glass member of the present invention has an internal transmittance in a direction perpendicular to the optical axis after irradiation of 2 ⁇ 10 6 pulses of F 2 laser light having a fluence of 10 mJ / cm 2 , and has a thickness of 1 / Preferably, it is 90% or more per 4 inches (about 0.64 cm), and the difference between the maximum value and the minimum value of the internal transmittance within the irradiation area is within 1.0%.
- a synthetic quartz glass member for vacuum ultraviolet with excellent laser resistance can be provided.
- a step of manufacturing a base material of synthetic quartz glass, a step of sampling a part of the base material, and 1 OmJ / cm When one F2 laser beam having a fluence of 2 was irradiated with 2x10 or re-irradiation, the increase in OH groups contained in a part of the base material was less than 1 O wt.ppm and the compaction was 2 p.
- a method for manufacturing a synthetic quartz glass member including a step of processing the base material to form a synthetic quartz glass member is provided.
- a quartz base material suitable for vacuum ultraviolet light is selected by irradiating a part of the base material with an F 2 laser beam under the above conditions and detecting an increase in 0H groups and compaction.
- the increase in OH groups can be determined by infrared or Raman spectroscopy, for example, by increasing the integrated intensity of the infrared absorption band based on OH stretching vibration. Increase in OH group 1 0 OWT.
- a step of manufacturing a base material of synthetic quartz glass a step of sampling a part of the base material, and a step of: 10 mJ / cm
- the reduction of H 2 molecules contained in a part of the base material was less than 1 ⁇ 10 18 / cm 3 and the compaction was 2 when the content is not more than ppm
- a step of processing the base material to form a synthetic quartz glass member a step of processing the base material to form a synthetic quartz glass member.
- a quartz glass member suitable for vacuum ultraviolet light is selected by irradiating a part of the base material with F 2 laser light under the above conditions and detecting the reduction of H 2 molecules and the compaction. can do.
- Quartz glass for A r F laser one typically contains an OH group in a large amount and hardly transmitted through the F 2 laser beam having a wavelength of 1 5 7 nm. Therefore, even if the durability test is performed by directly irradiating the quartz glass with an ArF laser, it takes a long time and accurate judgment cannot be expected.
- by observing the decrease of H 2 molecules using two lasers and one light as a light source it is possible to observe strain coupling accurately and in a short time.
- the reduction of H 2 molecules can be determined by infrared spectroscopy or Raman spectroscopy.
- the Raman scattering spectrum based on the stretching vibration of H 2 molecules near 4140 cm- 1 is calculated.
- the decrease in the peak around 41 40 CM_ 1 is less than 80%
- reduction of H 2 molecules can be determined to be less than 1 .chi.1 0 18 atoms / cm 3.
- FIG. 1 is a block diagram schematically showing a synthesis furnace for producing synthetic quartz glass.
- FIG. 2 is a block diagram illustrating a configuration of a laser-irradiation apparatus for injecting a test F 2 laser pulse into the synthetic quartz glass obtained in the synthesis furnace of FIG.
- FIG. 3 is a block diagram illustrating the configuration of a Raman scattering spectrometer for measuring the optical characteristics of the sample SA damaged by the laser irradiation apparatus of FIG.
- FIG. 4 is a block diagram illustrating the configuration of an infrared light transmission spectrometer for measuring the optical characteristics of the sample S A damaged by the laser irradiation apparatus of FIG.
- FIG. 5 is a front view illustrating a method for manufacturing a synthetic quartz glass member using the apparatus shown in FIGS.
- FIG. 6A is a graph showing a change in the H 2 Raman scattering peak of the sample
- FIG. 6B is a graph showing a change in the H 2 Raman scattering peak of the comparative sample.
- FIG. 7A is a graph showing the OH infrared absorption of the sample
- FIG. 7B is a graph showing the change in the 0 H infrared absorption of the comparative sample.
- FIG. 8 is a diagram schematically showing the structure of the exposure apparatus of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1 is a diagram schematically showing a synthesis furnace for producing synthetic quartz glass.
- This synthesizing furnace is composed of a parner 2 that blasts a flame to hydrolyze the raw material, a quartz glass target 4 that holds an ingot IN formed by the hydrolysis, and an evening gate 4 around an axis.
- Drive device 6 for rotating, etc.
- raw material supply device 8 for supplying raw materials such as silicon tetrachloride to parner 2
- fuel supply device 10 for supplying hydrogen gas to burner 2
- oxygen gas for parner 2
- Pana 2 is installed in the upper part of the furnace chamber 14 with its tip facing the target 4.
- the evening gate 4 is driven by the driving device 6 to rotate around the vertical axis at an appropriate speed, and further swings right and left along the plane of the paper. Further, the target 4 is gradually lowered by the driving device 6 as the ingot grows.
- the raw material supply device 8 includes a flow rate control unit 8a, and blows out high-purity silicon tetrachloride as a raw material together with a carrier gas from the central pipe of the burner 2. When silicon tetrafluoride is used as a raw material, a fluorine-doped quartz glass can be obtained.
- the fuel supply device 10 includes a flow rate control unit 10a, and supplies hydrogen as a fuel to the outer pipe of the parner 2.
- the oxygen supply device 12 also includes a flow rate control unit 12a, and supplies oxygen to be mixed with fuel to the outer pipe of the parner 2.
- An oxygen gas and a hydrogen gas are mixed and burned by the burner 2 to form a flame.
- silicon tetrachloride is spouted from Pana 2.
- the raw material is hydrolyzed in the flame at the tip of the Pana 2 to generate fine silica glass particles (strips).
- FIG. 1 is a proc diagram illustrating the configuration of a record one The one irradiation device for irradiating a F 2 laser one pulse for testing the synthetic quartz glass obtained in Synthesis furnace of FIG.
- the first light A laser light source 22 that generates laser light, an irradiation optical system 24 for uniformly irradiating the sample SA cut out from the ingot IN with a laser pulse from the laser light source 22, and a laser light source 22 A holder 26 for holding the irradiation optical system 24 and a control device 28 for controlling the operation of the laser light source 22 are provided.
- the laser light source 22 outputs a laser pulse in the vacuum ultraviolet region of 157 nm.
- the intensity of the laser pulse emitted from the laser light source 22 is adjusted based on a control signal from the control device 28.
- the irradiation optical system 24 adjusts the energy density and the beam shape of the laser pulse incident on the sample SA.
- the control device 28 outputs a control signal to the laser light source 22 to adjust the fluence of the laser pulse applied to the sample SA to 10 mJ / cm 2 .
- the reason for setting it to 1 O m J / cm 2 is that the maximum laser light per minute immediately after being emitted from a commercially available F 2 laser device is used.
- the control device 28 can adjust the number of laser pulses applied to the sample SA to 2 ⁇ 10 6 by counting the number of pulses.
- FIG. 3 is a block diagram showing a Raman scattering spectrometer for measuring the Raman scattering characteristics of the sample SA damaged by the laser irradiation apparatus of FIG.
- the Raman scattering spectrometer includes a light source 32 for generating excitation light necessary for measurement, an irradiation optical system 34 for uniformly inputting a laser pulse from the light source 32 to the sample SA, and a laser beam emitted from the sample SA.
- a condensing optical system 36 that collects light a spectroscope 38 that measures the wavelength distribution of the transmitted light collected by the condensing optical system 36, and a control device 39 that controls the operation of the spectrometer 38 Run.
- the light source 32 has an excitation laser-oscillator (Ar gas laser) for inducing Raman scattering of H 2 , and outputs excitation light having a wavelength of 514 nm at an appropriate intensity.
- the irradiation optical system 34 adjusts the energy density of the excitation light to be incident on the sample SA ⁇ ⁇ ⁇ ⁇ beam shape.
- the condensing optical system 36 collects the Raman scattered light generated in the sample SA and makes it incident on the spectroscope 38.
- the spectroscope 38 detects the Raman scattered light collected by the condensing optical system 36 and measures the spectrum component intensity. Further, the control device 39 outputs a control signal to the spectroscope 38 to measure the spectral intensity of the Raman scattered light emitted from the sample SA and determine the peak intensity thereof.
- FIG. 4 is a block diagram showing an infrared light transmission spectrometer for measuring the infrared absorption characteristics of the sample SA damaged by the laser irradiation apparatus of FIG.
- This infrared light transmission spectrometer includes a light source 32 for generating illumination light necessary for measurement, and a spectroscope 33 for selecting and outputting light of a specific wavelength from the illumination light emitted from the light source 32.
- a detector 35 for measuring the intensity of illumination light from the spectrometer 33 transmitted through the sample SA; and a control device 37 for controlling the operation of the spectrometer 33 and the detector 35.
- the light source 32 has a halogen lamp which is an infrared illumination light source device, and outputs infrared illumination light having a wavelength of 2.5 to 2.9 ⁇ including an absorption band due to the 0H group at an appropriate intensity. I do.
- the spectroscope 33 continuously switches the wavelength of the infrared illumination light to be supplied to the sample S #.
- the detector 35 measures the intensity of the transmitted light through the sample SA c
- the control device 3 7 spectroscope 3 3 and the detector 35 to output a control signal, the transmitted light for sample SA Are measured to determine the integrated intensity.
- a method for measuring compaction will be described. The amount of compaction was measured with a commercially available Fize 'set laser interferometer.
- a He—Ne laser (wavelength: 63.3 nm) was used as a light source.
- One laser beam from the light source was passed through a diverging lens, a beam splitter, and a collimator lens to become parallel light, and reached a highly accurately polished flat glass plate called a reference plate.
- Some of the light is reflected by the reference surface of the reference plate, and the rest of the light passes through the sample, reaches the mirror located on the back of the sample, and is reflected.
- the reflected light from the reference surface and the reflected light from the mirror reverse the original optical path, interfere with each other, are guided to the image sensor (CCD) by the beam splitter, and an interference fringe image is obtained.
- CCD image sensor
- FIG. 5 is a flowchart for explaining a method of manufacturing a synthetic quartz glass member using the apparatus shown in FIGS. First, a synthetic quartz glass ingot IN is manufactured using the synthesis furnace shown in Fig. 1 (step S10).
- the ingot IN is formed on the target 4 by hydrolyzing the raw material in the flame injected from the burner 2.
- a test piece is cut out from the ingot IN obtained in step S10 and used as a sample SA (step S11).
- the Raman scattering characteristics of the sample SA due to H 2 are measured using the analyzer of FIG. 3, and the absorption characteristics of the sample SA due to ⁇ H are measured using the analyzer of FIG. 4 (step S 13). .
- the sample SA is irradiated with the excitation light, and the peak intensity of the Raman scattered light having a wavelength of about 2.4 ⁇ m (wave number of about 4140 cm ⁇ 1 ) is evaluated.
- the sample SA is irradiated with appropriate illumination light to evaluate the integrated intensity of the absorption band at a wavelength of about 2.7 ⁇ (wave number of about 3660 cm- 1 ).
- the compaction of the sample SA is measured using a laser interferometer. In this case, Raman scattering is obtained by preparing a pair of a sample SA processed by the apparatus of FIG. 2 and a sample SA not processed by the apparatus of FIG. 2 and performing measurements by the analyzers of FIGS. 3 and 4 in parallel.
- the peak intensity of H 2 Raman scattered light in sample SA after processing by the laser-irradiation device in Fig. 2 is the peak intensity of H 2 Raman scattered light in sample SA not processed by the device in Fig. 2. It is determined whether it decreases by 80% or more compared to It should be noted that another chemical analysis method may be used to determine whether the decrease in H 2 molecules dissolved in the sample is less than 1 ⁇ 10 18 particles / cm 3 .
- the integrated intensity of the 0 H infrared absorption band of the sample SA processed by the apparatus of FIG. 2 was 1 compared with the integrated intensity of the OH infrared absorption band of the sample SA not processed by the apparatus of FIG. It is determined whether it increases by 0% or more.
- H 2 peak intensity of the Raman scattered light is reduced by 80% or more (if reduction of H 2 molecules dissolved in the sample is 1 x1 0 1 zone cm 3 or more), OH infrared integral strength of the absorption band If There increase of 1 0% or more (if reduction of H 2 molecules dissolved in the sample is 1 .chi.1 0 18 atoms / cm 3 or higher), or if the compaction is greater than 2 p pm, stearyl Uz flop S 1 0 The processing is terminated on the assumption that the laser resistance of the ingot IN obtained in step 1 is insufficient.
- step S15 a glass piece for an optical material is cut out from the ingot IN obtained in step S10.
- step S15 a plurality of blocks corresponding to the shape of a target optical member such as a lens or a prism are cut out from the ingot IN.
- step S16 the block obtained in step S15 is processed and polished. Specifically, for each of the plurality of blocks cut out in step S15, grinding and polishing of the optical surface are performed, and if necessary, the optical surface is coated to form an optical member.
- the obtained optical member is fixed in place on a holding member such as a lens barrel to complete a synthetic quartz glass member such as a reduced projection lens (step S17).
- the Raman scattering band intensity of hydrogen molecules observed near 4140 cm- 1 decreases by 20% after irradiation.
- the Raman scattering band intensity of the hydrogen molecules after the F 2 laser one before irradiation is normalized respectively by Raman scattering peak that by the S i-0 is observed around 800 CM_ 1. From the integrated intensity of the Raman scattering band, it was found that the sample after irradiation with the F 2 laser contained 110 3 wt. Ppm of OH and 0.8 ⁇ 10 18 hydrogen molecules Zcm 3 . That, OH is 1 3 wt by F 2 laser one irradiation. Increased p pm, the hydrogen molecules was reduced 0. 2 ⁇ 1 0 18 or Zc m 3.
- the transmittance at 193 nm (including reflection loss), which was 90.70% before irradiation, changed to 90.67% in the irradiated part. Since the transmittance was hardly reduced in this way, it was confirmed that the sample of this example had good laser resistance as a glass for use in an ArF excimer laser.
- the F 2 laser for samples irradiated under the above conditions was measured compa Kushiyon as follows. First, without placing the sample, the optical path length distribution of the reference plate was measured with a Fizeau laser interferometer. Thereafter, the optical path length distribution was measured with the 6 Omm0x10 field sample interposed between reference plates. At this time, oil with the same refractive index as that of quartz glass is applied to the contact surface between the reference plate and the sample in order to suppress the reflection generated at the contact surface between the sample and the reference plate. Infiltrated in between. The optical path length distribution of the sample was estimated by calculating the difference in the measured optical path length without the sample from the optical path length measured across the sample.
- the compaction amount ⁇ was obtained by dividing the difference ⁇ L in the optical path length between the irradiated part and the non-irradiated part by the thickness of the sample. As a result, the F 2 laser irradiation section, the compaction volume was 1. 8 p pm.
- Example 2 A sample was synthesized in the same manner as in Example 1, but in the subsequent annealing step, a comparative sample subjected to annealing at 1,200 ° C. in air for 10 hours was produced, and the same evaluation as in Example 1 was performed. .
- This comparison sample was found to have 1 O OOwt. P pm, the hydrogen molecules 1x1 0 18 atoms / cm 3 comprise a OH by measurement of the Raman scattering scan Bae-vector.
- 2 ⁇ 10 6 pulses were irradiated with an F 2 laser at a fluence of 10 mJ / cm 2 perpendicularly to the ⁇ 60 mm area on the surface of the comparative sample.
- a sample was prepared by a method substantially similar to that of Example 1. However, the sample was made to contain substantially no OH group, contain 1 ⁇ 10 18 hydrogen molecules, Zcm 3, and contain 3000 wt. Ppm fluorine by adjusting the fluorine doping component. The components and composition of this sample were confirmed from the Raman scattering spectrum and the infrared absorption spectrum. At room temperature, the perpendicular to the surface on .phi.6 Omm region of the sample, was an F 2 laser one fluence 1 OmJ / cm 2 2x1 0 6 pulse irradiation. It was observed Raman scattering scan Bae spectrum of the sample after the F 2 laser one irradiation.
- Infrared absorption scan Bae-vector samples of F 2 laser one before and after irradiation is shown in Figure 7 A.
- an infrared absorption band of SiOH appeared around 3660 cm- 1 .
- the integrated intensity of the SiOH in the infrared absorption band was 22 / cm 2 , and the concentration of the OH group was estimated to be 1 Owt.ppm from the integrated intensity.
- Comparative Example 2 A sample was synthesized in the same manner as in Example 2 above, but a comparative sample not doped with fluorine was prepared and evaluated in the same manner as in Example 2. This comparative sample was substantially free of OH and contained 1 ⁇ 10 18 hydrogen molecules / cm 3 . At room temperature, the F 2 laser was irradiated with 2 ⁇ 10 6 pulses at a fluence of 10 mJ / cm 2 perpendicularly to the ⁇ 60 mm area on the surface of this comparative sample, and as shown in FIG. An infrared absorption band of OH appeared. The integrated intensity of this infrared absorption band was 220 / cm 2 , and the OH concentration determined from this integrated intensity was 10 Owt.ppm.
- a synthetic quartz glass block having the same composition (fluorine 3000 wt. Ppm dose) as in Example 2 was prepared, and a reticle substrate having a side of 140 (mm) and a thickness of 1/4 (inch) was prepared.
- the entire surface of the substrate was irradiated with 2 ⁇ 10 6 pulses of F 2 laser at 1 OmJ / cm 2 .
- the F 2 laser reticle substrate good record one The - had a resistance and uniform permeability.
- the compaction amount of the portion irradiated with the F 2 laser was measured in the same manner as in Example 1.
- the compaction amount in the irradiated part was 1. Op pm.
- Example 3 A sample was synthesized in the same manner as in Example 3, but a comparative substrate in which fluorine was not doped was produced, and the same evaluation as in Example 3 was performed.
- the entire surface of the substrate was irradiated with 2 ⁇ 10 6 pulses of F 2 laser at 1 OmJ / cm 2 .
- the transmittance at 157 nm decreased by 10% near the center of the sample, and the difference between the maximum value and the minimum value in the plane of 140 mm x 140 mm was 3%.
- F The 2 laser one reticle substrate can not be said to have good laser one resistance.
- the compaction amount of the portion irradiated with the F 2 laser was measured in the same manner as in Example 1.
- the compaction amount of the irradiated part was 2.5 ppm.
- FIG. 8 shows a schematic structure of a projection exposure apparatus called a stepper using the quartz glass member manufactured in Example 1 as a lens.
- This apparatus projects an image of a reticle (mask) R pattern onto a wafer W that has been cooled by a photoresist.
- the exposure apparatus 600 mainly includes a light source 100 for supplying exposure light, a reticle stage 201 on which a reticle R is placed, a wafer stage 301 on which a wafer W is placed, and It includes an illumination optical system 101 for illuminating the reticle R, and a projection optical system 500.
- a substrate 801 (wafer W) on which a photosensitive agent 701 is also applied is placed on the surface 301a of the wafer stage 301.
- the light source 100 uses an ArF laser (193 nm).
- a laser that emits vacuum ultraviolet light such as an F 2 laser (wavelength: 157 nm)
- the projection optical system 500 projects an image of the surface P 1 (object plane) of the reticle R onto a surface P 2 (image plane) of the substrate W having a conjugate relationship with P 1.
- the illumination optics 101 is a combination of reticle R and wafer W An alignment optical system 110 for adjusting the relative position between them is provided.
- the reticle exchange system 200 exchanges and transports the reticle (mask R) set in the reticle stage 201.
- Reticle exchange system 200 includes a stage driver (not shown) for moving reticle stage 201 parallel to surface 301 a of wafer stage 301.
- the wafer stage 301 is controlled by the stage control system and moves with respect to the projection optical system 500 to change the area on the wafer W where the reticle pattern is transferred.
- the light source 100, the reticle exchange system 200, and the stage control system 300 are managed by the main control unit 400.
- the quartz glass members manufactured in Example 1 are used, respectively.
- the reticle R is also manufactured using the quartz glass substrate manufactured in the embodiment. Therefore, a decrease in transmittance during the exposure operation is sufficiently suppressed, and deterioration of the highly accurate reticle pattern is prevented.
- the ArF excimer laser element having excellent laser one resistance to the one or F 2 laser for example, a suitable lens, a prism, a reticle. Further, by the method for producing a synthetic quartz glass member of the present invention, it is possible to provide an optical element having excellent laser resistance in a vacuum ultraviolet region and an exposure apparatus having the same.
- the exposure apparatus of the present invention includes the synthetic quartz glass member of the present invention, even if a vacuum ultraviolet light source such as ArF is used, it is possible to suppress the deterioration of a pattern image due to a decrease in transmittance over a long period of time. Can be.
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Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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EP20030712920 EP1491513A1 (en) | 2002-03-25 | 2003-03-25 | Synthetic quartz glass member and process for producing the same |
JP2003578290A JPWO2003080525A1 (ja) | 2002-03-25 | 2003-03-25 | 合成石英ガラス部材及びその製造方法 |
AU2003221105A AU2003221105A1 (en) | 2002-03-25 | 2003-03-25 | Synthetic quartz glass member and process for producing the same |
US10/947,366 US20050047986A1 (en) | 2002-03-25 | 2004-09-23 | Synthetic quartz glass member and method for producing the same |
Applications Claiming Priority (2)
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JP2002-83476 | 2002-03-25 | ||
JP2002083476 | 2002-03-25 |
Related Child Applications (1)
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US10/947,366 Continuation US20050047986A1 (en) | 2002-03-25 | 2004-09-23 | Synthetic quartz glass member and method for producing the same |
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WO2003080525A1 true WO2003080525A1 (fr) | 2003-10-02 |
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PCT/JP2003/003618 WO2003080525A1 (fr) | 2002-03-25 | 2003-03-25 | Element de verre de quartz synthetique et procede de production de celui-ci |
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Country | Link |
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US (1) | US20050047986A1 (ja) |
EP (1) | EP1491513A1 (ja) |
JP (1) | JPWO2003080525A1 (ja) |
AU (1) | AU2003221105A1 (ja) |
WO (1) | WO2003080525A1 (ja) |
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JP2014209200A (ja) * | 2013-03-22 | 2014-11-06 | Hoya株式会社 | マスクブランクの製造方法および転写用マスクの製造方法 |
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US20070049482A1 (en) | 2005-08-11 | 2007-03-01 | Shin-Etsu Chemical Co., Ltd. | Synthetic quartz glass substrate for excimer lasers and making method |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0720970A1 (en) * | 1995-01-06 | 1996-07-10 | Nikon Corporation | Silica glass for photolithography, optical member including the same, exposure apparatus including the same, and method for producing the same |
EP0720969A1 (en) * | 1995-01-06 | 1996-07-10 | Nikon Corporation | Silica glass, optical member including the same, and method for producing the same |
JPH11116248A (ja) * | 1997-10-13 | 1999-04-27 | Nikon Corp | 合成石英ガラス部材 |
EP0943586A2 (en) * | 1998-01-23 | 1999-09-22 | Nikon Corporation | Synthetic silica glass and its manufacturing method |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
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US5325230A (en) * | 1989-06-09 | 1994-06-28 | Shin-Etsu Quartz Products Co., Ltd. | Optical members and blanks of synthetic silica glass and method for their production |
EP0401845B2 (en) * | 1989-06-09 | 2001-04-11 | Heraeus Quarzglas GmbH & Co. KG | Optical members and blanks of synthetic silica glass and method for their production |
US5410428A (en) * | 1990-10-30 | 1995-04-25 | Shin-Etsu Quartz Products Co. Ltd. | Optical member made of high-purity and transparent synthetic silica glass and method for production thereof or blank thereof |
US6376401B1 (en) * | 1998-09-07 | 2002-04-23 | Tosoh Corporation | Ultraviolet ray-transparent optical glass material and method of producing same |
JP2001019465A (ja) * | 1999-07-07 | 2001-01-23 | Shin Etsu Chem Co Ltd | エキシマレーザ用合成石英ガラス部材及びその製造方法 |
US6578382B2 (en) * | 2000-03-29 | 2003-06-17 | Heraeus Quarzglas Gmbh & Co. Kg | Synthetic quartz glass for optical use, heat treatment method and heat treatment apparatus for the same |
EP1233005B2 (en) * | 2001-02-15 | 2013-01-16 | Heraeus Quarzglas GmbH & Co. KG | Method for producing synthetic quartz glass members for excimer lasers and synthetic quartz glass members for excimer laser optics produced by the same |
-
2003
- 2003-03-25 EP EP20030712920 patent/EP1491513A1/en not_active Withdrawn
- 2003-03-25 AU AU2003221105A patent/AU2003221105A1/en not_active Abandoned
- 2003-03-25 WO PCT/JP2003/003618 patent/WO2003080525A1/ja not_active Application Discontinuation
- 2003-03-25 JP JP2003578290A patent/JPWO2003080525A1/ja not_active Withdrawn
-
2004
- 2004-09-23 US US10/947,366 patent/US20050047986A1/en not_active Abandoned
Patent Citations (4)
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EP0720970A1 (en) * | 1995-01-06 | 1996-07-10 | Nikon Corporation | Silica glass for photolithography, optical member including the same, exposure apparatus including the same, and method for producing the same |
EP0720969A1 (en) * | 1995-01-06 | 1996-07-10 | Nikon Corporation | Silica glass, optical member including the same, and method for producing the same |
JPH11116248A (ja) * | 1997-10-13 | 1999-04-27 | Nikon Corp | 合成石英ガラス部材 |
EP0943586A2 (en) * | 1998-01-23 | 1999-09-22 | Nikon Corporation | Synthetic silica glass and its manufacturing method |
Non-Patent Citations (1)
Title |
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MIZUGUCHI MASAFUMI ET AL.: "Photochemical processes induced by 157-nm light in H2-inpregnated glassy SiO2:OH", OPTICS LETTERS, vol. 24, no. 13, 1 July 1999 (1999-07-01), pages 863 - 865, XP002970076 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2014209200A (ja) * | 2013-03-22 | 2014-11-06 | Hoya株式会社 | マスクブランクの製造方法および転写用マスクの製造方法 |
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EP1491513A1 (en) | 2004-12-29 |
JPWO2003080525A1 (ja) | 2005-07-21 |
US20050047986A1 (en) | 2005-03-03 |
AU2003221105A1 (en) | 2003-10-08 |
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