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. 05, 2014
Filed:
Jul. 27, 2010
Shigeyoshi Netsu, Joetsu, JP;
Shinichi Kurotani, Joetsu, JP;
Kyoji Oguro, Joetsu, JP;
Fumitaka Kume, Joetsu, JP;
Shigeyoshi Netsu, Joetsu, JP;
Shinichi Kurotani, Joetsu, JP;
Kyoji Oguro, Joetsu, JP;
Fumitaka Kume, Joetsu, JP;
Shin-Etsu Chemical Co., Ltd., Tokyo, JP;
Abstract
One end side of a core wire holderis formed into a shape of a truncated cone and has an inclined surface. In the end portion, an openingis provided, and a hollow portionis formed, a silicon core wirebeing inserted into the hollow portionand held therein. On the surface of the silicon core wire, polycrystalline siliconis vapor deposited by the Siemens method to produce a polycrystalline silicon rod. On the inclined surface of the truncated cone portion in the vicinity of the opening, as a thermal insulating layer, annular slitstoare formed from an outer circumferential surface in the vicinity of the opening toward the hollow portion. The annular slit acts as a thermal insulating portion, and suppresses escape of the heat to heat the one end side of the core wire holder