Quartz crystal vibrator using Ni-Ag or Cr-Ni-Ag electrode layers
US4259607A · kind A · utility
24Cited by
6References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 19, 1978 |
| Grant date | Mar 31, 1981 |
| Priority date | — |
| Expiry date | Jun 19, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/215
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A structure of an electrode film deposited on a tuning fork-type quartz crystal vibrator in which an electrode film on a tuning fork-type quartz crystal vibrator has a laminated structure obtained by forming, in the order mentioned, three overlapping layers, namely layers of chrome, nickel and silver, or two overlapping layers, namely layers of nickel and silver, on the surface of a tuning fork-shaped quartz crystal from the side nearest thereto, and in which the thickness of each layer of the electrode film is less than 300 A for the chrome layer, less than 500 A for the nickel layer, and less than 2000 A for the silver layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.