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:
Jun. 02, 2009
Filed:
Apr. 04, 2006
Tomohisa Azuma, Tokyo, JP;
Masakazu Hirose, Tokyo, JP;
Akira Suzuki, Tokyo, JP;
Kouji Taniwaki, Tokyo, JP;
Tomohisa Azuma, Tokyo, JP;
Masakazu Hirose, Tokyo, JP;
Akira Suzuki, Tokyo, JP;
Kouji Taniwaki, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
There is provided a resonator having a piezoelectric ceramic resonator which has excellent free-fall resistance. The resonator comprises a piezoelectric ceramic resonatorwith a vibrating electrode formed, and a substratewhich supports the piezoelectric ceramic resonator, wherein the piezoelectric ceramic resonatorsatisfies the condition of U≧0.88×H+20.28, wherein U=maximum elastic energy (kJ/m) per unit volume, and H=drop height (m) (H>1). The present invention can be applied to a resonator, wherein the substratehas terminal electrodes, and the piezoelectric ceramic resonatoris in electrical continuity with the vibrating electrode and is supported on the substrateat both ends via a conductive stator