Quartz crystal resonator and quartz crystal resonator unit
US11063573B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Dec 7, 2018 |
| Grant date | Jul 13, 2021 |
| Priority date | — |
| Expiry date | Feb 24, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/19
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A quartz crystal resonator that includes a substrate including a vibration portion, a frame portion that surrounds the vibration portion, and first to fourth coupling portions that couple the vibration portion and the frame portion to each other; and first and second excitation electrodes. An intersecting point of diagonal lines of a quadrangle formed by first to fourth connection portions is located on the positive side of the z axis relative to the x axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.