Electrostatically sealed piezoelectric device
US4639631A · kind A · utility
38Cited by
14References
43Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 1, 1985 |
| Grant date | Jan 27, 1987 |
| Priority date | — |
| Expiry date | Jul 1, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/1021
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A piezoelectric device package consists of a base and a cover which are sealed together to hermetically seal a piezoelectric device such as a quartz crystal therebetween. A recess in the cover receives the quartz crystal. Feedthrough holes in the base, or the cover, or both, which have electrostatic seals formed over them provide a means for making electrical connections with the quartz wafer while still maintaining the hermetic seal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.