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:
Jun. 17, 2025
Filed:
Jun. 11, 2021
Canon Kabushiki Kaisha, Tokyo, JP;
Miki Ueda, Tokyo, JP;
Takanori Matsuda, Tokyo, JP;
Tatsuo Furuta, Tokyo, JP;
Hisato Yabuta, Tokyo, JP;
Akira Uebayashi, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A piezoelectric material having a large electromechanical coupling coefficient is provided. The material is manufactured by a method including the steps of: heating a piezoelectric material having a low-temperature side ferroelectric phase A and a high-temperature side ferroelectric phase B between which the phase of the piezoelectric material transitions according to a temperature change, from room temperature to a temperature range higher than Tat which temperature a change from the ferroelectric phase B to the ferroelectric phase A occurs in a temperature lowering process and lower than Tat which temperature a change from the ferroelectric phase A to the ferroelectric phase B occurs in a temperature rising process; starting application of an electric field to the piezoelectric material in a state where it is held within this temperature range; and continuing and finishing the electric field application at a temperature lower than T.