The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 29, 1985
Filed:
Jan. 05, 1983
Kazutaka Terashima, Ebina, JP;
Tsuguo Fukuda, Yokohama, JP;
Agency of Industrial Science & Technology, Tokyo, JP;
Ministry of International Trade & Technology, Tokyo, JP;
Abstract
A III-V compound semiconducting single crystal is manufactured by a method using an encapsulant, which method comprises allowing the molten mass of a material for the crystal melted in advance under high pressure to be placed under a pressure lower than the pressure to be exerted during the work of pulling the crystal thereby causing the molten mass to generate bubbles and allowing the departing bubbles to entrain impurities from the molten mass, bringing a seed crystal into contact with the molten mass, applying a potential to the molten mass thereby determining the impurity concentration of the molten mass based on the results of the measurement and, after the impurity concentration of the molten mass determined as described above has reached a prescribed level, initiating the work of pulling the crystal from the molten mass.