摘要:
It is to provide a photomask substrate which has a low birefringence and with which polarized illumination can be employed or immersion exposure can be carried out.A photomask substrate made of a synthetic quartz glass to be used for production of a semiconductor employing a light source having an exposure wavelength of at most about 200 nm, which has a birefringence of at most 1 nm/6.35 mm at the exposure wavelength, and of which the amount of decrease in light transmittance is at most 1.0% as a difference in light transmittance at a wavelength of 217 nm, between before and after irradiation with Xe excimer lamp with an illuminance of 13.2 mW/cm2 for 20 minutes.
摘要翻译:提供一种具有低双折射率的光掩模衬底,并且可以采用偏振照明或可以进行浸没曝光。 一种由合成石英玻璃制成的光掩模基板,用于生产在曝光波长处具有至多1nm / 6.35mm的双折射的具有至多约200nm的曝光波长的光源的半导体,以及 在照射为13.2mW / cm 2的Xe准分子灯照射20分钟之前和之后,在217nm波长下的透光率差为1.0%以下。
摘要:
It is to provide a photomask substrate which has a low birefringence and with which polarized illumination can be employed or immersion exposure can be carried out. A photomask substrate made of a synthetic quartz glass to be used for production of a semiconductor employing a light source having an exposure wavelength of at most about 200 nm, which has a birefringence of at most 1 nm/6.35 mm at the exposure wavelength, and of which the amount of decrease in light transmittance is at most 1.0% as a difference in light transmittance at a wavelength of 217 nm, between before and after irradiation with Xe excimer lamp with an illuminance of 13.2 mW/cm2 for 20 minutes.
摘要翻译:提供一种具有低双折射率的光掩模衬底,并且可以采用偏振照明或可以进行浸没曝光。 一种由合成石英玻璃制成的光掩模基板,用于生产在曝光波长处具有至多1nm / 6.35mm的双折射的具有至多约200nm的曝光波长的光源的半导体,以及 在照射为13.2mW / cm 2的Xe准分子灯照射前后,透光率的降低量为217nm波长下的透光率差为1.0%以下, SUP> 20分钟。
摘要:
A structure for attaching a pellicle to a photomask, the pellicle comprising a pellicle frame and a pellicle sheet attached to an opening portion formed in the pellicle frame, wherein at least a portion of the pellicle frame surface in contact with the photo-mask has a direct contact with the photo-mask without interposing an adhesive.
摘要:
A pellicle formed by bonding a pellicle membrane composed of synthesized glass on a pellicle frame by an adhesive wherein a light shielding member for shielding ultra-violet rays irradiated to the adhesive is provided at a portion where the pellicle membrane is bonded to the pellicle frame, whereby the adhesive for bonding the pellicle membrane to the pellicle frame is prevented from being deteriorated due to the irradiation of ultra-violet rays for cleaning.
摘要:
It is characterized by having a pellicle sheet made of a synthetic quartz glass having an OH group concentration of at most 100 ppm and containing substantially no oxygen deficient defect. It is particularly preferred that the OH group concentration is at most 10 ppm, and the internal transmittance is at least 80%/cm at a wavelength of 157 nm.
摘要翻译:其特征在于,具有由OH基浓度为100ppm以下且基本上不含缺氧缺陷的合成石英玻璃制成的防护薄片。 特别优选OH基浓度为10ppm以下,内部透射率为157nm以上至少80%/ cm 3。
摘要:
A low-expansion glass substrate for a reflective mask, wherein the glass substrate is suited for a base material of a reflective mask employed in a lithographic process in semiconductor fabrication, comprises a lateral surface, a chamfered portion and a notched portion formed along an outer periphery thereof, at least one of the lateral surface, the chamfered portion and the notched portion being provided with a mirror-finished surface.
摘要:
A method for measuring the shape of a heating treatment jig to be held by a holding portion of a vertical heat treatment apparatus includes measuring the shape of the heat treatment jig in a state that the position of a supporting portion for supporting the heat treatment jig is set to be the same as the position of the holding portion for the heat treatment jig in the vertical heat treatment apparatus. The heat treatment jig can be used for placing a semiconductor wafer to be subjected to heat treatment.
摘要:
To provide a polishing method for a glass substrate required to have extremely high surface smoothness and surface precision, like a glass substrate to be used for e.g. a reflective mask for extreme ultra violet lithography. A surface of a glass substrate containing SiO2 as the main component, is polished with a polishing slurry comprising colloidal silica having an average primary particle size of at most 50 nm, an acid and water, and having the pH adjusted to be within a range of from 0.5 to 4, so that the surface roughness Rms will be at most 0.15 nm as measured by an atomic force microscope.
摘要:
A low-expansion glass substrate for a reflective mask, wherein the glass substrate is suited for a base material of a reflective mask employed in a lithographic process in semiconductor fabrication, comprises a lateral surface, a chamfered portion and a notched portion formed along an outer periphery thereof, at least one of the lateral surface, the chamfered portion and the notched portion being provided with a mirror-finished surface.
摘要:
The present invention relates to a glass substrate for a magnetic recording medium, which is a disk-shaped glass substrate for a magnetic recording medium having a circular hole at the center thereof, in which the glass substrate for a magnetic recording medium has an inner peripheral side surface, an outer peripheral side surface and both main surfaces, and the both main surfaces have parallelism of 3.2 μm or less in at least a recording and reproducing region thereof.