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:
Sep. 29, 2009
Filed:
Jul. 25, 2005
Tetsuya Morimura, Toyama, JP;
Yoshihiro Ikeda, Himi, JP;
Makoto Irie, Toyama, JP;
Motonori Matsushita, Toyama, JP;
Tetsuya Morimura, Toyama, JP;
Yoshihiro Ikeda, Himi, JP;
Makoto Irie, Toyama, JP;
Motonori Matsushita, Toyama, JP;
Murata Manufacturing Co., Ltd., Kyoto, JP;
Abstract
A method of manufacturing a piezoelectric resonator includes forming first electrodes larger than vibrating electrodes in an area Dincluding the vibrating electrodes on obverse and reverse surfaces of a piezoelectric substrate, and measuring the resonant frequency frof a resonator including the first electrodes. The thickness of a metallic thin film required for frequency adjustment is determined based on the measured resonant frequency. Then, second electrodes formed of the metallic thin film having the determined thickness are formed in an area Dincluding at least the vibrating electrodes of the piezoelectric substrate. By removing unnecessary portions of the first and second electrodes, a pattern of the resulting vibrating electrodes is formed. Thus, high-accuracy frequency adjustment can be achieved without the need for complicated positioning.