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. 15, 2015
Filed:
Jul. 31, 2012
Yasuhiro Aida, Tokyo, JP;
Katsuyuki Kurachi, Tokyo, JP;
Hitoshi Sakuma, Tokyo, JP;
Kazuhiko Maejima, Tokyo, JP;
Yasuhiro Aida, Tokyo, JP;
Katsuyuki Kurachi, Tokyo, JP;
Hitoshi Sakuma, Tokyo, JP;
Kazuhiko Maejima, Tokyo, JP;
TDK CORPORATION, Tokyo, JP;
Abstract
A piezoelectric device according to the present invention is provided with a pair of electrode films, a piezoelectric film sandwiched in between the pair of electrode films, and a stress control film which is in direct contact with a surface of at least one of the pair of electrode films, on the side where the electrode film is not in contact with the piezoelectric film, and which has a linear expansion coefficient larger than those of the relevant electrode film and the piezoelectric film.