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, 2022
Filed:
Sep. 30, 2020
Applicant:
Sumco Corporation, Tokyo, JP;
Inventor:
Eiichi Kawasaki, Tokyo, JP;
Assignee:
SUMCO CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C30B 15/32 (2006.01); C30B 29/06 (2006.01); B32B 18/00 (2006.01); C04B 35/83 (2006.01); C30B 15/00 (2006.01);
U.S. Cl.
CPC ...
C30B 15/32 (2013.01); B32B 18/00 (2013.01); C04B 35/83 (2013.01); C30B 15/007 (2013.01); C30B 29/06 (2013.01); C04B 2235/5268 (2013.01); C04B 2237/385 (2013.01); C04B 2237/765 (2013.01); C04B 2237/84 (2013.01);
Abstract
A seed crystal holder for pulling up a single crystal is made of a carbon fiber-reinforced carbon composite material, and has a substantially cylindrical shape with a hollow space having a shape matching an outer shape of a substantially rod-shaped seed crystal. A direction of carbon fibers at a part in contact with at least an outer peripheral surface of the seed crystal has isotropy as viewed from a central axis of the hollow space.