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. 06, 2012
Filed:
Oct. 07, 2011
Shigeru Koumoto, Tokyo, JP;
Tatsuya Sasaki, Tokyo, JP;
Kazuhiro Shiba, Tokyo, JP;
Masayoshi Sumino, Tokyo, JP;
Shigeru Koumoto, Tokyo, JP;
Tatsuya Sasaki, Tokyo, JP;
Kazuhiro Shiba, Tokyo, JP;
Masayoshi Sumino, Tokyo, JP;
Renesas Electronics Corporation, Kanagawa, JP;
Abstract
According to the present invention, there is provided an electrode structure which includes: a nitride semiconductor layer; an electrode provided over the nitride semiconductor layer; and an electrode protective film provided over the electrode, wherein the nitride semiconductor layer contains a metal nitride containing Nb, Hf or Zr as a constitutive element, the electrode has a portion having a metal oxide containing Ti or V as a constitutive element formed therein, and the electrode protective film covers at least a portion of the electrode, and contains a protective layer having Au or Pt as a constitutive element.