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. 05, 2025
Filed:
Feb. 14, 2022
Applicant:
Sumitomo Chemical Company, Limited, Tokyo, JP;
Inventors:
Assignee:
SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C30B 29/18 (2006.01); C30B 25/18 (2006.01); C30B 29/38 (2006.01);
U.S. Cl.
CPC ...
C30B 29/38 (2013.01); C30B 25/18 (2013.01);
Abstract
An object is to improve quality of a nitride crystal. A crystal represented by a composition formula InAlGaN (satisfying 0≤x≤1, 0≤y≤1, and 0≤x+y≤1), wherein the concentration of carbon in the crystal is less than 1×10cm, and the concentration of an electron trap E3 that exits in an energy range from 0.5 eV to 0.65 eV from a lower end of a conduction band in the crystal is less than 1×10cm.