Crystal oscillating element, crystal oscillation device, and method of manufacturing crystal oscillating element
US10862453B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 25, 2017 |
| Grant date | Dec 8, 2020 |
| Priority date | — |
| Expiry date | Aug 1, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H2003/022
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The oscillating element includes a crystal blank, a pair of excitation electrodes, and a pair of pad portions. The crystal blank includes a pair of major surfaces, at least partially configured by crystal planes, and side surfaces which connect outer edges of the pair of major surfaces. Further, it includes a mesa portion and an outer peripheral portion which surrounds the mesa portion and has a thickness between the pair of major surfaces thinner than that of the mesa portion. The excitation electrodes are individually located on the pair of major surfaces. The pair of pad portions are located on one of the pairs of major surfaces and are electrically connected with the excitation electrodes. At least a portion of an edge part which is in contact with a crystal plane includes a projecting portion, which does not exceed the height of the mesa portion from the outer peripheral portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.