Surface mount crystal oscillator
US7339309B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 13, 2005 |
| Grant date | Mar 4, 2008 |
| Priority date | — |
| Expiry date | Aug 22, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B5/32
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In a crystal oscillator having a crystal blank, and an IC chip having integrated therein an oscillation circuit, the crystal blank has a first excitation electrode disposed on its first principal surface, and an extension electrode extended from the first excitation electrode to a peripheral region of the crystal blank, and folded back to the second principal surface. A first and a second crystal connection terminal are disposed on a first principal surface of the IC chip, and the second crystal connection terminal extends to a central region on the first principal surface of the IC chip to constitute a second excitation electrode. The extension electrode is secured to the first crystal connection terminal through a bump, such that the second principal surface of the crystal blank opposes the first principal surface of the IC chip, thereby holding the crystal blank in parallel with the first principal surface of the IC chip. The crystal blank is excited by the first and the second excitation electrodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.