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. 06, 2001
Filed:
May. 19, 2000
Murata Manufacturing Co., Ltd., Kyoto, JP;
Abstract
A piezoelectric device includes a piezoelectric substrate having a piezoelectric driving unit and provided with outer coating substrates laminated on major surfaces thereof via adhesive layers, and external electrodes provided on the outer surfaces of a layered body included in the piezoelectric device. In the piezoelectric device, each of the adhesive layers includes a first layer of an adhesive having a Shore D hardness after curing of not more than approximately 60, and disposed so as not to be exposed in a region of lateral side surfaces of the layered body provided with the external electrodes, a second layer of an adhesive having a Shore D hardness of at least approximately 60, and a third layer of an adhesive having a Shore D hardness of at least approximately 60 and having a viscosity before curing of at least approximately 3.0×10,mPas at a temperature of 25° C. The third layer is disposed between the periphery of the first layer and the region of the lateral side surfaces of the layered body provided with the external electrodes.