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. 21, 2017
Filed:
Dec. 22, 2011
Mikio Shimada, Tokyo, JP;
Toshiaki Aiba, Fujisawa, JP;
Toshihiro Ifuku, Yokohama, JP;
Takanori Matsuda, Chofu, JP;
Takayuki Watanabe, Yokohama, JP;
Mikio Shimada, Tokyo, JP;
Toshiaki Aiba, Fujisawa, JP;
Toshihiro Ifuku, Yokohama, JP;
Takanori Matsuda, Chofu, JP;
Takayuki Watanabe, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A piezoelectric element having an improved piezoelectric constant is provided, and a liquid discharge head, an ultrasonic motor, and a dust removing device, each of which uses the above piezoelectric element, are also provided. A piezoelectric element at least includes a pair of electrodes and a piezoelectric material provided in contact with the pair of electrodes, the piezoelectric material is formed of an aggregate of crystal grains containing barium titanate as a primary component, and among the crystal grains of the aggregate, crystal grains at least in contact with the electrodes have dislocation layers in the grains. A liquid discharge head, an ultrasonic motor, and a dust removing device each use the above piezoelectric element.