Quartz crystal unit and holding structure for same
US7388320B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 12, 2005 |
| Grant date | Jun 17, 2008 |
| Priority date | — |
| Expiry date | Jul 12, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/177
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A crystal unit includes: a crystal blank in which a depression which function as a vibration region is formed; first and second excitation electrodes formed on both principle surfaces, respectively, of the crystal blank in the vibration region; first and second extending electrodes provided so as to extend from the first and second excitation electrodes, respectively, toward the outer periphery of the crystal blank; and a receptacle body. Bonding of the first extending electrode with eutectic alloy at one point of the outer periphery of the crystal blank electrically and mechanically connects the crystal blank to the receptacle body with the one point as the fixed end. The second extending electrode extends as far as the position of the fixed end and is electrically connected to the receptacle body by wire bonding at the position of the fixed end.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.