Surface mount crystal unit and surface mount crystal oscillator
US7034441B2 · kind B2 · utility
18Cited by
7References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 12, 2003 |
| Grant date | Apr 25, 2006 |
| Priority date | — |
| Expiry date | Nov 12, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/1014
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A surface mount crystal unit comprising a crystal blank, a planar mounting substrate made of silicon and a cover having a shape with a recess and made of glass containing ions having high mobility. The mounting substrate and the cover are bonded by means of anode bonding and the crystal blank is hermetically sealed in a case made up of the mounting substrate and the cover. The mounting substrate has connection electrodes used for a connection with the crystal blank and external terminals to be used to surface-mount the crystal unit. The connection electrodes and external terminals are electrically connected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.