摘要:
A method is provided for estimating durability of an optical member against pulsed excimer laser beam irradiation. The method includes the steps of (a) irradiating a test sample for the optical member with a pulsed excimer laser beam to induce changes in transparency of the test sample with respect to the pulsed excimer laser beam, the irradiation being performed for such a time period as to cover not only a linear region and a saturation region and (b) measuring changes in the transparency of the test sample with respect to the pulsed excimer laser beam as a function of the cumulative number of the excimer laser pulses that have irradiated the test sample in step (a). The method further includes the step of (c) repeating steps (a) and (b) with a plurality of different first predetermined energy densities of the pulsed excimer laser beam to derive a correlation equation representing the changes in the transparency of the test sample in the linear region and the saturated region in terms of the energy density of the pulsed excimer laser beam and the cumulative number of the excimer laser pulses and (d) estimating the durability of the optical member under actual usage conditions using the derived correlation equation.
摘要:
Recent UV-lithography is required to provide a fine and sharp pattern with a line width of 0.5 .mu.m or less. The present invention provides a silica glass member adapted for use as an optical element for UV-lithography, by giving consideration to the RMS value of wave front aberration and the slant element of refractive index, which have not been considered in the art. Also, there is provided a silica glass member excellent in durability to the ultraviolet irradiation, by introduction of hydrogen molecules at the synthesis of the silica glass, instead of the using a secondary treatment for hydrogen introduction.
摘要:
Recent UV-lithography is required to provide a fine and sharp pattern with a line width of 0.5 .mu.m or less. The present invention provides a silica glass member adapted for use as an optical element for UV-lithography, by giving consideration to the RMS value of wave front aberration and the slant element of refractive index, which have not been considered in the art. Also there is provided a silica glass member excellent in durability to the ultraviolet irradiation, by introduction of hydrogen molecules at the synthesis of silica glass, instead of the secondary treatment for hydrogen introduction.
摘要:
A silica glass member of the present invention is one wherein when a composition thereof is expressed by SiOx, x is not less than 1.85 nor more than 1.95, wherein a concentration of hydrogen molecules included therein is not less than 1×1016 molecules/cm3 nor more than 5×1018 molecules/cm3, and wherein a difference A−B between an absorption coefficient A immediately before an end of irradiation with 1×104 pulses of ArF excimer laser light in an average one-pulse energy density of 2 mJ/cm2 and a second absorption coefficient B at 600 seconds after a stop of the irradiation with the ArF excimer laser light is not more than 0.002 cm−1. When this silica glass member is applied to an illumination optical system and/or a projection optical system in projection exposure apparatus, it becomes feasible to implement uniform exposure while reducing variation in illuminance on a reticle surface and in an exposure area on a wafer.
摘要翻译:本发明的石英玻璃构件是当其组成由SiO x表示时,x不小于1.85或不大于1.95,其中包含的氢分子的浓度不小于1×10 16分子/ cm <3>不超过5×10 18分子/ cm 3,并且其中在照射结束之前的吸收系数A与平均单脉冲中的1×10 4个ArF准分子激光脉冲之间的差AB 用ArF准分子激光照射停止600秒后的能量密度为2mJ / cm 2,第二吸收系数B为0.002cm -1以下。 当将该石英玻璃构件应用于投影曝光装置中的照明光学系统和/或投影光学系统时,可以实现均匀曝光,同时减小掩模版面和晶片上的曝光区域中的照度变化。
摘要:
A silica glass is provided for use in an optical system processing an excimer laser beam. The silica glass has a molecular hydrogen concentration of about 5×1018 molecules/cm3 or less and is substantially free from defects which become precursors susceptible to an one-photon absorption process and a two-photon absorption process upon irradiation of the excimer laser beam to the silica glass.
摘要翻译:提供石英玻璃用于处理准分子激光束的光学系统中。 二氧化硅玻璃的分子氢浓度约为5×1018分/ cm 3或更低,并且基本上没有成为对单光子吸收过程敏感的前体的缺陷和在将准分子激光束照射到二氧化硅上时的双光子吸收过程 玻璃。
摘要:
The invention relates to fluorine-containing silica glasses, and methods of their production. The silica glass may be used for an ultraviolet light optical system in which light in a wavelength region of 200 nm or less, such as an ArF (193 nm) excimer laser, is used. The invention also relates to a projection exposure apparatus containing fluorine-containing glass of the invention.
摘要:
A method of manufacturing synthetic silica glass includes the steps of pressurizing a liquid storage tank including a liquid silicon compound therein, generating bubbles in the liquid silicon compound using a foamer, removing the bubbles using a degasser, displacing the liquid silicon compound into a vaporizer while controlling an amount of the liquid silicon compound displaced by a liquid mass flow meter, mixing the displaced liquid silicon compound with a carrier gas to generate a gaseous silicon compound, injecting the gaseous silicon compound into a synthesis furnace, and forming synthetic silica glass by hydrolyzing the gaseous silicon compound in the synthesis furnace.
摘要:
Recent UV-lithography is required to provide a fine and sharp pattern with a line width of 0.5 .mu.m or less. The present invention provides a silica glass member adapted for use as an optical element for UV-lithography, by giving consideration to the RMS value of wave front aberration and the slant element of refractive index, which have not been considered in the art. Also, there is provided a silica glass member excellent in durability to the ultraviolet irradiation, by introduction of hydrogen molecules at the synthesis of the silica glass, instead of using a secondary treatment for hydrogen introduction.
摘要:
An optical member made of silica glass manufactured by the direct method where a material gas comprising an organosilicon compound is allowed to react in an oxidizing flame, said optical member having a 2×1014 molecules/cm3 or less concentration of formyl radical generated by X-ray irradiation whose dose is 0.01 Mrad or more and 1 Mrad or less.
摘要翻译:通过直接法制造的由石英玻璃制成的光学构件,其中包含有机硅化合物的材料气体在氧化火焰中反应,所述光学构件具有2×10 14分子/ cm 3 通过X射线照射产生的或更少浓度的甲酰基,其剂量为0.01Mrad以上且1Mrad以下。
摘要:
This invention provides a synthetic silica glass optical member used together with light having a specific wavelength of 250 nm or less, in which the difference between the maximum value and the minimum value of transmittance [%/cm] per cm in thickness for the light in a predetermined direction within a plane perpendicular to the optical axis is 2.0%/cm or less.
摘要翻译:本发明提供一种与特定波长为250nm以下的光一起使用的合成石英玻璃光学构件,其中,光的最大值和透射率的最小值(cm / cm)/ cm 垂直于光轴的平面内的预定方向为2.0%/ cm以下。