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:
Oct. 22, 2013
Filed:
Apr. 19, 2010
Shun-ichi Seki, Hyogo, JP;
Hiroki Kamiguchi, Osaka, JP;
Hidekazu Nakanishi, Osaka, JP;
Hiroyuki Nakamura, Osaka, JP;
Shun-ichi Seki, Hyogo, JP;
Hiroki Kamiguchi, Osaka, JP;
Hidekazu Nakanishi, Osaka, JP;
Hiroyuki Nakamura, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
An acoustic wave element includes a piezoelectric body, first and second interdigital transducer (IDT) electrodes provided on an upper surface of the piezoelectric body, and a first dielectric layer provided on the upper surface of the piezoelectric body to cover the first and second IDT electrodes. The first dielectric layer has a first part directly above the first IDT electrode and a second part directly above the second IDT electrode. The height of an upper surface of the second part of the first dielectric layer is larger than the height of an upper surface of the first part of the first dielectric layer. This acoustic wave element has a preferable temperature characteristic and electromechanical coupling factor.