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. 15, 2016
Filed:
Feb. 10, 2014
Skyworks Filter Solutions Japan Co., Ltd., Kadoma-Shi, JP;
Tomohiro Iwasaki, Kyoto-Fu, JP;
Hiroyuki Nakamura, Osaka-Fu, JP;
Toru Yamaji, Kyoto-Fu, JP;
Mitsunori Miyanari, Osaka-Fu, JP;
Masahiro Yasumi, Osaka-Fu, JP;
Shoji Okamoto, Osaka-Fu, JP;
SKYWORKS FILTER SOLUTIONS JAPAN CO., LTD., Kadoma-Shi, JP;
Abstract
An acoustic wave device includes a piezoelectric substrate, an IDT electrode including plural electrode fingers disposed above an upper surface of the piezoelectric substrate, a first dielectric film made of oxide disposed above the upper surface of the substrate for covering the electrode fingers, and a second dielectric film made of non-oxide disposed on upper surfaces of the electrode fingers and between the first dielectric film and each of the electrode fingers. The first dielectric film contacts the upper surface of the piezoelectric substrate at a position between electrode fingers out of the plural electrode fingers adjacent to each other. The acoustic wave device prevents the electrode fingers of the IDT electrode from corrosion.