Piezoelectric vibration element and piezoelectric vibration device
US10629799B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 7, 2017 |
| Grant date | Apr 21, 2020 |
| Priority date | — |
| Expiry date | Apr 20, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/132
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A crystal vibration element includes a plate shaped crystal blank including a pair of long sides and pair of short sides when viewed on a plane, and a pair of excitation electrodes superimposed on the two major surfaces of the crystal blank. When viewed on a plane, each of the pair of excitation electrodes includes a pair of short edges extending along a pair of short sides on inner sides of the pair of short sides, and a pair of long edges extending along a pair of long sides on inner sides of the pair of long sides. The pair of short edges are shaped as straight line parallel to the pair of short sides, while the pair of long edges are shaped outwardly bulging when viewed on a plane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.