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:
Sep. 17, 2002
Filed:
Aug. 17, 2000
Other;
Abstract
This invention provides a piezoelectric laminate body that limits, to a minimum, the difference of the quantity of displacement occurring in the boundary between an electrode center portion of a unit laminate body and its alternate electrode portions upon the application of an electric field, by improving a laminate structure of alternate electrode structure type unit laminate bodies. Each piezoelectric device sheet of the unit laminate bodies constituting this piezoelectric laminate body integrally includes a device sheet portion and each lug portion and is made of a piezoelectric ceramic material. An electrode layer is so formed as to extend to the surface of the device sheet portion and the surface of the lug portion Among the laminate sheets the electrode layer of a lower laminate sheet overlaps with the back of an upper laminate sheet Each unit laminate body is laminated serially in such a fashion that the positions of the uppermost unit laminate body to the lowermost unit laminate body are deviated at 90 degrees in a direction orthogonal to the laminating direction (FIG. 3).