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:
Jan. 21, 2014
Filed:
Jul. 17, 2012
Youichi Kamada, Yamato, JP;
Youichi Kamada, Yamato, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
An embodiment of a compound semiconductor device includes: a substrate; an electron channel layer and an electron supply layer formed over the substrate; a gate electrode, a source electrode and a drain electrode formed on or above the electron supply layer; a first p-type semiconductor layer formed between the electron supply layer and the gate electrode; and a second p-type semiconductor layer formed between the electron supply layer and at least one of the source electrode and the drain electrode. The one of the source electrode and the drain electrode on the second p-type semiconductor layer includes: a first metal film; and a second metal film which contacts the first metal film on the gate electrode side of the first metal film, and a resistance of which is higher than that of the first metal film.