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. 28, 2016
Filed:
Sep. 26, 2011
Akihiro Kimura, Nishishirakawa-gun, JP;
Suguru Matsumoto, Nishishirakawa-gun, JP;
Izumi Fusegawa, Nishishirakawa-gun, JP;
Katsuhiko Miki, Nishishirakawa-gun, JP;
Akihiro Kimura, Nishishirakawa-gun, JP;
Suguru Matsumoto, Nishishirakawa-gun, JP;
Izumi Fusegawa, Nishishirakawa-gun, JP;
Katsuhiko Miki, Nishishirakawa-gun, JP;
SHIN-ETSU HANDOTAI CO., LTD., Tokyo, JP;
Abstract
Described herein is a method for producing a quartz glass crucible, including the steps of: preparing a crucible base material that is made of quartz glass and has a crucible shape; producing a synthetic quartz glass material by the direct process or the soot process; processing the synthetic quartz glass material into a crucible shape without pulverizing the synthetic quartz glass material; and welding the synthetic quartz glass material processed into the crucible shape to the inner surface of the crucible base material. As a result, there are provided a quartz glass crucible that avoids generation of dislocation in a silicon single crystal, the generation of dislocation caused by the crucible itself, at the time of production of a silicon single crystal and has high heat resistance, a method for producing the quartz glass crucible, and a method for producing a silicon single crystal, the method using such a quartz glass crucible.