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:
Jan. 23, 2018
Filed:
Nov. 28, 2014
Kyocera Corporation, Kyoto-shi, Kyoto, JP;
Makoto Higashibeppu, Kirishima, JP;
Shuuhei Tabata, Kirishima, JP;
Tomonori Eguchi, Kagoshima, JP;
Izuru Sato, Kirishima, JP;
KYOCERA Corporation, Kyoto-Shi, Kyoto, JP;
Abstract
The present invention aims at providing a piezoelectric element with less characteristic variations with time, and a liquid discharge head and a recording device each using the piezoelectric element. The piezoelectric elementof the present invention is the piezoelectric body(piezoelectric ceramic layer) containing a potassium sodium niobate composition as a primary component. The piezoelectric body extends in a planar direction. A compressive stress is applied in the planar direction. A phase transition point between a tetragonal crystal system and an orthorhombic crystal system is −20° C. or below.