Quartz crystal vibrator, oscillator and electronic apparatus
US7589458B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 27, 2009 |
| Grant date | Sep 15, 2009 |
| Priority date | — |
| Expiry date | Jan 27, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/0002
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
To provide a quartz crystal vibrator, an oscillator and an electronic apparatus capable of preventing a bonding electrode from being corroded and easily maintaining soundness of the bonding electrode over a long period of time, a quartz crystal vibrator is provided with a quartz crystal vibrating plate formed by surrounding a quartz crystal vibrating piece by a frame-like portion, a hermetically closed vessel including a lid member and a base member in a plate-like shape for interposing the quartz crystal vibrating plate in a thickness direction, bonding electrodes provided between the lid member and the quartz crystal vibrating plate and between the base member and the quartz crystal vibrating plate and electrically connected to an inner electrode, and a protecting film for protecting the bonding electrode, provided with a recess portion recessed to an inner side of the hermetically closed vessel from an outer edge portion between the lid member and the quartz crystal vibrating plate and an outer edge portion between the base member and the quartz crystal vibrating plate, the protecting film is provided at the recess portion and the bonding electrode is disposed on the inner side …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.