Surface mount type crystal oscillator
US7378780B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 9, 2006 |
| Grant date | May 27, 2008 |
| Priority date | — |
| Expiry date | Jan 13, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/15174
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.