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. 08, 2017
Filed:
Aug. 30, 2012
Applicants:
Kazuhiro Ikeda, Itami, JP;
Hitoshi Sumiya, Itami, JP;
Inventors:
Kazuhiro Ikeda, Itami, JP;
Hitoshi Sumiya, Itami, JP;
Assignee:
Sumitomo Electric Industries, Ltd., Osaka-shi, JP;
Primary Examiner:
Int. Cl.
CPC ...
C30B 29/04 (2006.01); C30B 25/00 (2006.01); B01J 3/06 (2006.01); C30B 7/10 (2006.01);
U.S. Cl.
CPC ...
C30B 29/04 (2013.01); B01J 3/062 (2013.01); C30B 7/10 (2013.01); C30B 25/00 (2013.01); B01J 2203/061 (2013.01); B01J 2203/062 (2013.01); B01J 2203/068 (2013.01); B01J 2203/0655 (2013.01);
Abstract
Single-crystal diamond is composed of carbon in which a concentration of a carbon isotopeC is not lower than 99.9 mass % and a plurality of inevitable impurities other than carbon. The inevitable impurities include nitrogen, boron, hydrogen, and nickel, and a total content of nitrogen, boron, and hydrogen of the plurality of inevitable impurities is not higher than 0.01 mass %. In order to manufacture single-crystal diamond, initially, a hydrocarbon gas in which a concentration of the carbon isotopeC is not lower than 99.9 mass % is subjected to denitrification.