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:
May. 27, 2008
Filed:
Nov. 09, 2006
Hiroaki Mizumura, Sayama, JP;
Kouichi Moriya, Sayama, JP;
Hiroaki Mizumura, Sayama, JP;
Kouichi Moriya, Sayama, JP;
Nihon Dempa Kogyo Co., Ltd., Tokyo, JP;
Abstract
A surface mount type crystal oscillator includes: a container body composed of a laminated ceramic including a plate-shaped center layer, and first and second frame layers stacked on opposite surfaces of the center layer respectively; a crystal blank hermetically sealed in a first recess formed by the first frame layer and the center layer; an IC chip accommodated in a second recess formed by the second frame layer and the center layer; and a test terminal provided on the outer side surface of the container body and used to test the crystal blank. The center layer has at least a first layer and a second layers, and the test terminal is electrically connected to a crystal retaining terminal provided on the bottom surface of the first recess in order to retain the crystal blank through a conductive path provided on an interface between the first and second layers.