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. 20, 2022
Filed:
Mar. 01, 2018
Canon Kabushiki Kaisha, Tokyo, JP;
Akira Uebayashi, Tokyo, JP;
Tatsuo Furuta, Machida, JP;
Kanako Oshima, Tokyo, JP;
Takayuki Watanabe, Yokohama, JP;
Jumpei Hayashi, Yokohama, JP;
Satoshi Fujita, Utsunomiya, JP;
Yuki Iitsuka, Yaita, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
Provided is a method of manufacturing a piezoelectric element in which, at a time when the piezoelectric element is manufactured, a piezoelectric material is prevented from being exposed to a temperature higher than a Curie temperature thereof to be depolarized, to thereby significantly decrease piezoelectric properties. The method of manufacturing a piezoelectric element includes a first step of arranging a plurality of electrodes on a piezoelectric material, electrically short-circuiting two or more electrodes of the plurality of electrodes, and subjecting the piezoelectric material to heat treatment, and a second step of, after the first step, electrically opening the short circuit of the two or more electrodes at a time when a temperature of the piezoelectric material decreases to less than a temperature of the piezoelectric material at a time of the heat treatment.