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:
Jan. 19, 2010
Filed:
Sep. 17, 2008
Keiichi Umeda, Omihachiman, JP;
Takashi Miyake, Hakusan, JP;
Keiichi Umeda, Omihachiman, JP;
Takashi Miyake, Hakusan, JP;
Murata Manufacturing Co., Ltd., Kyoto, JP;
Abstract
A piezoelectric resonator includes a laminated thin film having a first thin film portion supported by a substrate and a second thin film portion spaced apart from a first main surface of the substrate and acoustically isolated from the substrate. The second thin film portion of the laminated thin film includes a piezoelectric thin film, a first electrode disposed on the upper surface of the piezoelectric thin film, and a second electrode disposed on the lower surface of the piezoelectric thin film and being larger and thicker than the first electrode. The piezoelectric resonator further includes a mass adding film disposed around the first electrode and on at least one portion of a region extending outward from the periphery of a piezoelectric vibrating portion at which the first and second electrodes overlap each other with the piezoelectric thin film disposed therebetween. The second electrode arranged so as to extend beyond the piezoelectric vibrating portion to a region at which the mass adding film is disposed.