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:
Oct. 24, 1989
Filed:
May. 02, 1988
Applicant:
Inventors:
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
310320 ; 310366 ; 310358 ;
Abstract
A chip type piezoelectric device includes an element body formed of cofired ceramic material and having at least a pair of excitation electrodes opposed to each other with a portion of the element body interposed therebetween. At least the portion interposed between the excitation electrodes has piezoelectricity imparted thereto, whereby this portion serves as a vibrating portion. Of the pair of excitation electrodes at least one excitation electrode is positioned in the interior of the element body, and the element body is formed with a cavity only on the side of this interiorly positioned excitation electrode away from the vibrating portion.