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:
Mar. 26, 2013
Filed:
Dec. 16, 2009
Ryoichi Ichikawa, Saitama, JP;
Ryoichi Ichikawa, Saitama, JP;
Nihon Dempa Kogyo Co. Ltd., Tokyo, JP;
Abstract
Piezoelectric devices are disclosed that include a chip plate sandwiched between a lid plate and a base plate. The chip plate includes a tuning-fork type piezoelectric vibrating piece surrounded by an outer frame. The lid plate includes a concavity on its inner major surface, and the base plate includes a concavity on its inner major surface. The lid plate, chip plate, and base plate are bonded together to form a package containing the piezoelectric vibrating piece. The tuning-fork type piezoelectric vibrating piece includes a base having an X-direction width and at least pair of vibrating arms extending from the base in a Y-direction. The tuning-fork type piezoelectric vibrating piece is coupled to the outer frame by supporting arms extending in the Y-direction outboard of the vibrating arms. The concavity of the lid plate includes at least one base-movement 'buffer' extending in the X-direction at a location corresponding to the base of the vibrating piece. The concavity of the base plate includes at least one base-movement buffer extending in the X-direction at a location corresponding to the base.