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:
Jun. 07, 2016
Filed:
Nov. 01, 2013
Nihon Dempa Kogyo Co., Ltd., Tokyo, JP;
NIHON DEMPA KOGYO CO., LTD., Tokyo, JP;
Abstract
A piezoelectric device includes a piezoelectric vibrating piece, a lid portion, and a base portion. The piezoelectric vibrating piece includes: a vibrating portion; a framing portion surrounding the vibrating portion; an excitation electrode in the vibrating portion; and an extraction electrode electrically connected to the excitation electrode in the framing portion. The lid portion is bonded to a front surface of the piezoelectric vibrating piece via a bonding material. The base portion includes an external electrode bonded to a back surface of the piezoelectric vibrating piece via a bonding material and electrically connected to the extraction electrode. The excitation electrode and the extraction electrode each include: a foundation film formed of metal to be rendered passive; and a first metal film and a second metal film laminated to the foundation film. The foundation film has a film thickness of 1.0 nm to 8.0 nm.