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:
Jul. 31, 2012
Filed:
Dec. 27, 2007
Applicants:
Isao Makabe, Yamanashi, JP;
Ken Nakata, Yamanashi, JP;
Inventors:
Isao Makabe, Yamanashi, JP;
Ken Nakata, Yamanashi, JP;
Assignee:
Eudyna Devices Inc., Yamanashi, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 29/205 (2006.01);
U.S. Cl.
CPC ...
Abstract
A semiconductor substrate includes: an AlN layer provided on a silicon substrate; an AlGaN layer that is provided on the AlN layer and has an Al composition ratio of 0.3 to 0.6; and a GaN layer provided on the AlGaN layer.