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. 22, 1998
Filed:
May. 27, 1997
NGK Insulators, Ltd., , JP;
Abstract
A piezoelectric film-type element includes a piezoelectric operating layer constructed by successively and integrally forming and stacking, on a ceramic substrate, a single flat film-shaped lower electrode, a piezoelectric layer, and an upper electrode comprising a plurality of alternately arranged strip electrodes. The lower electrode is designated as a first electrode, and the upper electrode is designated as a second electrode. A first piezoelectric operating means is constructed by the first and second electrodes and the piezoelectric layer, while a second piezoelectric operating means is constructed by the second electrode and the piezoelectric layer. No other piezoelectric layer is stacked on the foregoing piezoelectric operating layer. Operating characteristics of the piezoelectric operating section can be sufficiently utilized by constructing the piezoelectric film-type element as described above. Thus it is possible to provide a piezoelectric film-type element which has excellent performance, has a compact size and can operate at a low voltage.