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. 24, 2024
Filed:
Apr. 23, 2021
Nihon Dempa Kogyo Co., Ltd., Tokyo, JP;
Tetsuya Watanabe, Saitama, JP;
Takahiro Ohtsuka, Saitama, JP;
Kazuhiko Osawa, Saitama, JP;
Kazuhiro Hirota, Saitama, JP;
Yoshiro Teshima, Saitama, JP;
NIHON DEMPA KOGYO CO., LTD., Tokyo, JP;
Abstract
A piezoelectric device includes a conductive adhesive, a container, and an AT-cut crystal element. The AT-cut crystal element has at least one side surface intersecting with a Z'-axis of the crystallographic axis of the crystal constituted of three surfaces. When a dimension of a straight-line portion along the Z′-axis of a second side opposed to the first side is expressed as Wand a dimension along the Z′-axis of the AT-cut crystal element is expressed as W, W/Wis 0.91 or greater, and the straight-line portion has both sides constituting corner portions in approximately right angles with sides along an X-axis of the crystal of the AT-cut crystal element. The side of the first side is at a −X-side in an X-axis of the crystallographic axis of the crystal and a side of the second side is at a +X-side in the X-axis.