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:
Sep. 27, 2016
Filed:
Nov. 21, 2011
Osamu Okada, Mitoyo, JP;
Masaaki Kawakami, Mitoya, JP;
Osamu Okada, Mitoyo, JP;
Masaaki Kawakami, Mitoya, JP;
TOYO TANSO CO., LTD., Osaka-shi, Osaka, JP;
Abstract
A single crystal pulling apparatus () has a quartz crucible () for accommodating silicon melt (), a graphite crucible () for retaining the quartz crucible (), a tray () for securing and holding the graphite crucible () from below, and a crucible rotating shaft () for supporting the tray () from below and for elevating and lowering the tray () and the crucibles (), () while rotating them. A low heat conductive member () is interposed on a joint surface between the tray () and the crucible rotating shaft (). The low heat conductive member () is formed in a substantially tubular shape, and is interposed in such a manner that a protruding portion of the crucible rotating shaft () is inserted through a center hole of the low heat conductive member (). Thereby, a gap portion () is formed below a bottom portion of the tray ().