Sumitomo Electric Industries, Limited

Sumitomo Electric Industrial Co., Ltd.

Masayoshi Tatsumi

Yoshiki Kuhara

Toshihiro Kotani

Koji Tada

Hirokuni Nanba

A single-crystal boule pulling rod for pulling a boule from a melt utilizing the Czochralski method including a main pulling rod and a heat insulating layer surrounding the main pulling rod. The main pulling rod, which may be either bar-shaped or composed of two concentric pipes, is forcibly cooled. Preferably, a pipe made of molybdenum or stainless steel is provided around the heat insulating material.

Semiconductor boule pulling rod

A voltage and electric field measuring device using light as an operating parameter. An electro-optic crystal, a quarter-wave plate, and a polarization analyzer are arranged in that order in the direction of advancement of applied light. A voltage may be applied to the electro-optic crystal through electrodes arranged thereon. The electro-optic crystal belongs to a cubic system, such as bismuth silicon oxide or bismuth germanium oxide.

Growing community of inventors

Osaka, Japan

Masayoshi Tatsumi