Electrode piezoelectric devices including surface wave devices
US4472652A · kind A · utility
24Cited by
2References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 30, 1979 |
| Grant date | Sep 18, 1984 |
| Priority date | — |
| Expiry date | Apr 30, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/42
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A piezoelectric device comprising a housing that contains a piezoelectric body bearing aluminum film electrodes. The exposed surfaces of the electrodes bear a passivating layer of amorphous aluminum oxide formed by heating the electrodes at a temperature between 250.degree. and 550.degree. C. in an atmosphere containing free oxygen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.