Elastic wave device
US10741745B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 17, 2017 |
| Grant date | Aug 11, 2020 |
| Priority date | — |
| Expiry date | Nov 27, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N30/883
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An elastic wave device includes a piezoelectric substrate with first and second main surfaces internally facing each other, an elastic-wave element that includes an interdigital transducer electrode provided on or in the first main surface of the piezoelectric substrate, and a first protective film that is provided on the first main surface of the piezoelectric substrate so as to cover the IDT electrode. The IDT electrode includes a main electrode layer made of a metal having a density higher than that of the first protective film. The piezoelectric substrate has a thickness of about 0.35 mm or smaller, and irregularities are located on the second main surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.