Surface acoustic wave apparatus and communications device
US7301255B2 · kind B2 · utility
6Cited by
10References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 26, 2004 |
| Grant date | Nov 27, 2007 |
| Priority date | — |
| Expiry date | Apr 4, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2224/16225
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In a surface acoustic wave element 10, in which IDT electrodes 31 and 32, a grounding electrode 37, etc. are formed one main surface of a piezoelectric substrate 20, resistors 40 made of a semiconductor are provided to connection electrodes 38 that interconnect the respective electrodes. By forcing the charges generated in the IDT electrodes to move via the resistors 40, it is possible to provide a compact, highly reliable surface acoustic wave apparatus capable of preventing an electrostatic discharge damage in the IDT electrodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.