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:
Aug. 12, 1986
Filed:
Jan. 16, 1984
Kazutaka Terashima, Ebina, JP;
Tsuguo Fukuda, Yokohama, JP;
Agency of Industrial Science & Technology, Tokyo, JP;
Ministry of International Trade & Industry, Tokyo, JP;
Abstract
The heater member of a furnace for heating the crucible used for fusing raw materials for a semiconductor single crystal is provided with reinforcing members made of a material such as alumina or pyrolytic boron nitride which excels in electric insulating property, resistance to heat, and strength. When a magnetic field with an alternating current or pulsating current of electricity is applied to the site of single crystal growth for the purpose of stabilizing the growth of the single crystal, the furnace tends to sustain breakage. These reinforcing members thus used on the heater member impart improved durability to the furnace and enable the apparatus as a whole to enjoy a long service life.