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. 08, 2022
Filed:
Oct. 10, 2019
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventors:
Akira Uebayashi, Tokyo, JP;
Miki Ueda, Tokyo, JP;
Takanori Matsuda, Chofu, JP;
Makoto Kubota, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 41/107 (2006.01); H01L 41/04 (2006.01); H01L 41/187 (2006.01); H01L 41/083 (2006.01); H01L 41/053 (2006.01);
U.S. Cl.
CPC ...
H01L 41/107 (2013.01); H01L 41/044 (2013.01); H01L 41/0533 (2013.01); H01L 41/083 (2013.01); H01L 41/1871 (2013.01); H01L 41/1873 (2013.01);
Abstract
A piezoelectric transformer comprises at least a laminate of a first member, a first piezoelectric element, a second piezoelectric element and a second member sequentially stacked one on the other in the above-listed order and a pressurizing mechanism for squeezing the first member and the second member together in the stacking direction. The ratio of the electromechanical coupling coefficient krelative to the electromechanical coupling coefficient k(k/k) of the first piezoelectric element and the second piezoelectric element is not less than 2.0.