Abstract:
PROBLEM TO BE SOLVED: To inexpensively provide molten quartz glass suitably usable for various kinds of optical material utilizing ultraviolet light, visible light and infrared light, a member for manufacturing a semiconductor, a member for manufacturing a liquid crystal and a member for manufacturing a micro electro mechanical system (MEMS). SOLUTION: The molten quartz glass contains ≤5 ppm OH group, 12.0 Pa s coefficient of viscosity at 1215°C and expresses 1×10 -10 cm 2 /sec or less diffusion coefficient of Cu ion at 20-100 μm depth from the surface in the thermal diffusion of Cu ion in the atmosphere. The molten quartz glass is obtained by forming raw material silica powder into cristobalite and melting in a non-reducing atmosphere. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide synthetic quartz glass for vacuum UV light which has excellent durability to irradiation with vacuum UV light, a method for manufacturing the same, and a mask substrate for the vacuum UV light using the same. SOLUTION: The synthetic quartz glass for the vacuum UV light characterized in that the internal transmittance to the vacuum UV light of a wavelength 157 nm is >=50% per 1 cm and the ratio of lowering of the internal transmittance is shots of the vacuum UV light of the wavelength 157 nm at an energy density of 0.1 mJ/cm , and the method for manufacturing the same and the mask substrate for the vacuum UV light using the same are used.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for manufacturing high-quality silica glass which contains neither bubbles nor foreign substances and have high homogeneity with a lesser distribution of OH groups etc., to a shape approximate to that of a final product. SOLUTION: The method for manufacturing the silica glass comprises heating and vitrifying a porous or powder molded article of silica by irradiating the powder molded article with the continuous or impulsive electromagnetic waves of millimeters or submillimeters in wavelength generated from a gyrotron or magnetron etc. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide synthetic quartz glass having excellent resistance to radiation and UV irradiation, a method for manufacturing the same, and an optical base material for vacuum ultraviolet rays using the same. SOLUTION: In the synthetic quartz glass for vacuum ultraviolet rays synthesized by a soot method, the content of OH groups is 2-50 ppm, the content of F is 500-2,000 ppm, the content of Si-H bonds is ≤1×10 17 pieces/cm 3 , the concentrations of oxygen deficiency type defects and oxygen excess type defects are each ≤1×10 16 pieces/cm 3 , the internal transmittance at a wavelength of 163 nm is ≥60% per 1 cm, and the change in absorption coefficient at a wavelength of 215 nm is ≤0.001 cm -1 when 1×10 6 shots of ArF excimer laser having an energy density of 10 mj/cm 2 are made incident, so that the synthetic quartz glass exhibiting stability to radiation and UV irradiation is obtained. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract translation:要解决的问题:提供具有优异的耐辐射和紫外线照射的合成石英玻璃及其制造方法,以及使用该石英玻璃的真空紫外线的光学基材。 解决方案:在通过烟灰法合成的真空紫外线合成石英玻璃中,OH基的含量为2-50ppm,F的含量为500-2,000ppm,Si-H键的含量≤ 1×10 17 SP>个/ cm 3 / SP>,缺氧型缺氧和氧过剩型缺陷的浓度分别为≤1×10 16 SP> / cm 3 / SP>,波长163nm的内部透射率为1cm时≥60%,波长215nm处的吸收系数的变化为≤0.001cm -1 < / SP>当入射具有能量密度为10mj / cm 2 / SP>的ArF准分子激光器的1×10 6 SP>时,使得合成石英玻璃表现出稳定 获得辐射和紫外线照射。 版权所有(C)2005,JPO&NCIPI