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:
Jul. 02, 2002
Filed:
Oct. 25, 2000
Applicant:
Inventor:
Sachihito Nakafuku, Toyama, JP;
Assignee:
Murata Manufacturing Co., Ltd., Kyoto, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03H 9/54 ; H03H 9/15 ;
U.S. Cl.
CPC ...
H03H 9/54 ; H03H 9/15 ;
Abstract
A method of adjusting a frequency of an energy-trap type piezoelectric resonance element includes the steps of preparing a piezoelectric resonance element including first and second vibration electrodes formed partially on both of the main surfaces of a piezoelectric plate, the thickness of the first vibration electrode being larger than that of the second vibration electrode, and modifying the first vibration electrode or the second vibration electrode in such a manner that the thicknesses of the first and second vibration electrode electrodes are substantially equal to each other such that the piezoelectric resonance element has a desired frequency.