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:
Dec. 20, 2005
Filed:
Sep. 26, 2003
Eiju Komuro, Tokyo, JP;
Masaaki Imura, Tokyo, JP;
Katsuhiko Gunji, Tokyo, JP;
Taku Takeishi, Tokyo, JP;
Roger William Whatmore, Milton Keynes, GB;
Joseph Edward Albert Southin, Bedfordshire, GB;
Eiju Komuro, Tokyo, JP;
Masaaki Imura, Tokyo, JP;
Katsuhiko Gunji, Tokyo, JP;
Taku Takeishi, Tokyo, JP;
Roger William Whatmore, Milton Keynes, GB;
Joseph Edward Albert Southin, Bedfordshire, GB;
TDK Corporation, Tokyo, JP;
Abstract
A thin-film piezoelectric resonator including a piezoelectric thin film having piezoelectric characteristic, and an upper electrode and a lower electrode arranged on opposite surfaces of the piezoelectric thin film for applying an excitation voltage to the piezoelectric thin film, wherein: each of the upper electrode and the lower electrode includes a resonant portion, and a lead-out portion; and the electrode thickness of at least one part of the lead-out portion in at least one of the upper electrode and the lower electrode is larger than the electrode thickness of the resonant portion formed to be continued from the lead-out portion.