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:
Feb. 12, 2013
Filed:
Mar. 28, 2012
Applicant:
Norihiko Nakahashi, Nagaokakyo, JP;
Inventor:
Norihiko Nakahashi, Nagaokakyo, JP;
Assignee:
Murata Manufacturing Co., Ltd., Kyoto, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03H 9/25 (2006.01);
U.S. Cl.
CPC ...
Abstract
A surface acoustic wave device includes an electrode and a dielectric layer laminated on a piezoelectric substrate, in which the electrode includes a first electrode film containing Pt, Au, Ag, or Cu and a second electrode film containing Al, the normalized film thickness h/λ of the first electrode film is about 0.005 or more and at most about 0.015 in the case of Pt, the normalized film thickness h/λ of the Al film is about 0.06 or more and at most about 0.185, and the normalized film thickness h/λ of the dielectric layer is about 0.2 or less.