Surface mount type crystal oscillator
US7522006B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 2006 |
| Grant date | Apr 21, 2009 |
| Priority date | — |
| Expiry date | Apr 16, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/0552
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.