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:
Nov. 03, 2020
Filed:
Jul. 04, 2017
Applicant:
Sumitomo Electric Industries, Ltd., Osaka, JP;
Inventors:
Assignee:
Sumitomo Electric Industries, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C30B 29/56 (2006.01); C30B 29/42 (2006.01); C30B 11/00 (2006.01); H01L 29/207 (2006.01); C30B 29/40 (2006.01);
U.S. Cl.
CPC ...
C30B 29/42 (2013.01); C30B 11/00 (2013.01); C30B 29/40 (2013.01); H01L 29/207 (2013.01);
Abstract
In a gallium arsenide crystal body, an etching pit density of the gallium arsenide crystal body is more than or equal to 10 cmand less than or equal to 10000 cm, and an oxygen concentration of the gallium arsenide crystal body is less than 7.0×10atoms·cm. In a gallium arsenide crystal substrate, an etching pit density of the gallium arsenide crystal substrate is more than or equal to 10 cmand less than or equal to 10000 cm, and an oxygen concentration of the gallium arsenide crystal substrate is less than 7.0×10atoms·cm.