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:
Jun. 08, 1999
Filed:
Sep. 02, 1997
Yasushi Nakamura, Tomioka, JP;
Seiichiro Otsuka, Tomioka, JP;
Shin-Etsu Handotai Co., Ltd., Tokyo, JP;
Abstract
In a crystal holding apparatus, a corrugated portion between a seed crystal and a straight cylindrical portion of a crystal is held by a lifting jig during a single-crystal growing process wherein the seed crystal is brought into contact with a material melt and is subsequently pulled while being rotated. The tip end portion of the lifting jig includes a swinging portion having a short stroke which swings to hold or release the corrugated portion. A lock mechanism is also provided in order to swing the swinging portion for opening/closing operation and to lock the swinging portion. Accordingly, it is possible to reliably hold the corrugated portion of a crystal while the crystal is pulled in accordance with the CZ method, for example.