Surface acoustic wave grating
US4151492A · kind A · utility
3Cited by
2References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 16, 1978 |
| Grant date | Apr 24, 1979 |
| Priority date | — |
| Expiry date | Jan 16, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/02685
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A reflective grating for a surface acoustic wave device is formed of interleaved sets of contiguous metal strips deposited on the surface of the device. The metal in one set of the strips has a density greater than that of the acoustic propagating medium of the device while the metal of the second set of strips has a density essentially equal to that of the acoustic propagating medium of the device. Typically, a piezoelectric material such as a crystal of quartz or a crystal of lithium niobate is utilized as the base material of the device with the grating being formed of an overlay of alternating strips of gold and aluminum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.