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:
Dec. 02, 2003
Filed:
Sep. 22, 2001
Applicant:
Inventors:
Masanobu Watanabe, Kanazawa, JP;
Kazuhiro Inoue, Moriyama, JP;
Assignee:
Murata Manufacturing Co., Ltd., Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 4/108 ;
U.S. Cl.
CPC ...
H01L 4/108 ;
Abstract
A surface acoustic wave element includes multilayer electrodes having much higher electric power durability compared to conventional surface acoustic wave elements. The multilayer electrodes are prepared by forming, on a piezoelectric substrate, a Ti base electrode film that improves the orientation characteristics of the multilayer electrodes, an Al-type electrode film, an electrode film having a diffusive material that can easily diffuse into the grain boundary of the Al electrode film, and then an Al electrode film, in this order.