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. 01, 2015
Filed:
Feb. 22, 2013
Applicant:
Skyworks Panasonic Filter Solutions Japan Co., Ltd., Kadoma-Shi, Osaka, JP;
Inventors:
Tetsuya Tsurunari, Osaka, JP;
Joji Fujiwara, Osaka, JP;
Hiroyuki Nakamura, Osaka, JP;
Hidekazu Nakanishi, Osaka, JP;
Assignee:
SKYWORKS PANASONIC FILTER SOLUTIONS JAPAN CO., LTD., Kadoma-Shi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03H 9/72 (2006.01); H03H 9/64 (2006.01); H03H 9/02 (2006.01);
U.S. Cl.
CPC ...
H03H 9/64 (2013.01); H03H 9/0222 (2013.01); H03H 9/6483 (2013.01); H03H 9/725 (2013.01);
Abstract
A ladder-type surface acoustic wave filter includes a first series resonator having the lowest resonance frequency among a plurality of series resonators; and a second series resonator having a resonance frequency higher than the first series resonator. The film thickness of a dielectric film in the region where the first series resonator is formed is larger than that of a dielectric film in the region where the second series resonator is formed.