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:
Mar. 13, 2012
Filed:
Aug. 12, 2009
Applicants:
Yoshihiro Sato, Tokyo, JP;
Sadahiro Kato, Tokyo, JP;
Seikoh Yoshida, Tokyo, JP;
Inventors:
Assignee:
Furukawa Electric Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 29/778 (2006.01);
U.S. Cl.
CPC ...
Abstract
A semiconductor device includes a substrate; a buffer layer; and a compound semiconductor layer laminated on the substrate with the buffer layer in between. The buffer layer has a dislocation density in a plane in parallel to an in-plane direction thereof, so that a volume resistivity of the buffer layer becomes a substantially maximum value.