Surface acoustic wave filter and surface acoustic wave filter apparatus
US6750592B2 · kind B2 · utility
3Cited by
12References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 6, 2001 |
| Grant date | Jun 15, 2004 |
| Priority date | — |
| Expiry date | Mar 5, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/1071
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a surface acoustic wave filter in which a plurality of pairs of comb electrode patterns are formed on an upper surface of a chip substrate made of a piezoelectric material. The surface acoustic wave filter includes a high-resistance pattern formed to surround a peripheral portion of the chip substrate on an upper surface side thereof, and a plurality of patterns formed to connect the high-resistance pattern to the respective comb electrode patterns.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.