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:
Apr. 21, 2009
Filed:
Dec. 06, 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 comprises: a package body comprised of laminated ceramic including a flat central layer made up of a first layer and a second layer, and a first and a second frame layer; a crystal blank hermetically sealed in a first recess defined by the first layer and the first frame layer; an IC chip placed in a second recess defined by the central layer and second frame layer; and a shield electrode disposed on a laminated surface of the second layer with the first layer. First and second electrode through-holes are formed through the first layer and second layer, respectively, for electrically connecting the crystal blank to the IC chip. The first and second electrode through-holes are positioned in areas outside the mounting position of the IC chip on the second recess.