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. 10, 2015
Filed:
Mar. 29, 2013
Kyocera Corporation, Kyoto-shi, Kyoto, JP;
Shuzo Iwashita, Kyoto, JP;
Kyocera Corporation, Kyoto, JP;
Abstract
A head has a base and a piezoelectric element which is superimposed on and fastened to the base in a thickness direction. The piezoelectric element has a plate-shaped piezoelectric body, and a common electrode and a individual electrode arranged so as to sandwich the piezoelectric body in the thickness direction. The base has a higher thermal expansion coefficient than the piezoelectric body (the piezoelectric element). The piezoelectric body has a tetragonal principal crystal phase, in which the degree of orientation of the c-axis toward one side in the thickness direction (positive side in z direction) in the region sandwiched by the common electrode and the individual electrode is 44% or more and 56% or less in terms of the Lotgering factor and in which the residual stress in the surface direction is 0 MPa or more and 35 MPa or less in the direction of compression.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile