Shin-etsu Chemical Co., Ltd.

Shin-etsu Bio., Inc.

Jiro Moriya

Masataka Watanabe

Satoshi Okazaki

Tadakatsu Shimada

Hideo Hirasawa

Waichi Yamamura

Yoshiaki Shimizu

Kazuhisa Hatayama

Mitsukuni Sakashita

Minoru Taya

Shinji Suzuki

Takaaki Nagano

Shigehiro Nagura

Ichiro Kaneko

You Ishii

Kanji Murofushi

Shunichiro Kojima

Tamotsu Maruyama

Masayuki Suzuki

Hidekazu Ozawa

A square substrate has a pair of opposed major surfaces and peripheral end faces therebetween, wherein a tapered edge portion is disposed between the peripheral end face and each major surface to define an inner boundary with the major surface, and has a width of 0.2&#x2013;1 mm from the peripheral end face. Both or either one of the major surfaces of the substrate has a flatness of up to 0.5 &#x3bc;m in an outside region of the substrate that extends between a position spaced 3 mm inward from the peripheral end face and the inner boundary of the tapered edge portion.

Angular substrates

A method for manufacturing an optical fiber comprises setting a heating condition for heating a glass rod, which is a parent material of the optical fiber, and an elongating speed of the glass rod based on a prescribed numerical value which changes with a progress of elongation of the glass rod; heating and elongating the glass rod to generate a preform based on the heating condition and the elongating speed which are set by the setting; and drawing the preform to a filament-like form by further heating the preform to generate the optical fiber.

Optical fiber manufacture method, preform manufacture method, and preform manufacture apparatus

An angular substrate polishing method includes the steps of holding an angular substrate having a surface to be polished within a guide ring of a substrate holding head; pressing the substrate surface to be polished, and also one surface of the guide ring, against a polishing pad; and independently rotating the polishing pad and the substrate-holding head together with the substrate it holds while pressing the polishing pad-contacting surface of the guide ring against the polishing pad, to thereby polish the substrate surface. During the polishing step, a pressing force is applied to the guide ring which is separate from the pressing force applied to the substrate, enhancing the flatness of the polished substrate.

Method for polishing angular substrates

Method of making an optical fiber preform where a second elongation is based on a mark on a glass rod

A phase shift mask blank comprising a transparent substrate and at least one layer of a phase shifter thereon, wherein the phase shifter is a film composed primarily of a fluorine-doped metal silicide, can be fabricated into a high-performance phase shift mask having adequate transmittance and good stability over time even when used with light sources that emit short-wavelength light. The phase shift mask can be used to fabricate semiconductor integrated circuits to a smaller minimum feature size and a higher level of integration.

Phase shift mask blank, phase shift mask and method of manufacture

Optical fiber manufacture method including elongating a preform in a vertical direction and a horizontal direction

Pullulan is precipitated from an aqueous solution by mixing with a hydrophilic organic solvent incapable of dissolving pullulan. Solid pullulan is then separated from the liquid component of the dispersion by feeding the dispersion into a V-type disk press having a pair of discoid screens arranged so that the distance between them decreases as they are rotated. The pullulan dispersion is pressed by the discoid screens, recovering the liquid component through the screens. The resulting low-liquid-content pullulan continues to rotate together with the screens to an outlet, where it is discharged from the press.

Removal of liquid from pullulan

Growing community of inventors

Niigata, Japan

Jiro Moriya