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:
Nov. 04, 2008
Filed:
Mar. 28, 2006
Tatsuyuki Ogawa, Haruna-Machi, JP;
Yasukazu Tokuhisa, Haruna-Machi, JP;
Hiroaki Uenishi, Haruna-Machi, JP;
Shigeo Ishii, Haruna-Machi, JP;
Yoshiyuki Watanabe, Haruna-Machi, JP;
Tatsuyuki Ogawa, Haruna-Machi, JP;
Yasukazu Tokuhisa, Haruna-Machi, JP;
Hiroaki Uenishi, Haruna-Machi, JP;
Shigeo Ishii, Haruna-Machi, JP;
Yoshiyuki Watanabe, Haruna-Machi, JP;
Taiyo Yuden Co., Ltd., Tokyo, JP;
Abstract
Electrode layersA-C,A-C are formed on both main surfaces of each of piezoelectric layersA,B. Voltages of different polarities are respectively applied to the electrode layers next to each other on the same main surface and to the electrode layers opposing to each other via the piezoelectric layer. Projection formsare formed in respective edges of the second electrode layersB,B, each of which extends into the opposite area. Through-holes are formed in the piezoelectric layerA,B, in positions off a division line. The electrode layersA-C are connected together by the through-holesA,B and the projection form, to have an equal potential. Those are lead from the diaphragm to the outside, thus reducing the overall thickness.