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:
May. 18, 2004
Filed:
Jun. 20, 2002
Applicant:
Inventors:
Masaki Takeuchi, Otsu, JP;
Hajime Yamada, Otsu, JP;
Yoshihiko Goto, Shiga-ken, JP;
Tadashi Nomura, Kyoto, JP;
Assignee:
Murata Manufacturing Co., Ltd., Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03H 9/00 ; B23B 5/28 ;
U.S. Cl.
CPC ...
H03H 9/00 ; B23B 5/28 ;
Abstract
A piezoelectric resonator includes a substrate and a plurality of vibrating portions constructed such that a thin film portion having a piezoelectric thin film of one or more layers is sandwiched by at least a pair of upper electrodes and a lower electrode, which are opposed to each other, on the upper and lower surfaces of the thin film portion. The vibrating portions are separated by at least a distance equal to about &lgr;/2, where &lgr; represents the vibration wavelength, from elements affecting the vibration characteristics.