Crystal oscillator piece and method for manufacturing the same
US8460561B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 12, 2008 |
| Grant date | Jun 11, 2013 |
| Priority date | — |
| Expiry date | Mar 2, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/42
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The present invention provides a crystal oscillator piece in which the cross section of its vibrating tine, while not symmetrical in shape, has a principal axis that is oriented parallel to an X axis to suppress the generation of leakage vibration, and a method for manufacturing such a crystal oscillator piece. More specifically, the invention provides a crystal oscillator piece includes a vibrating tine having an upper surface, a lower surface having a larger width than the upper surface, a first side face, and a second side face, and a balance adjusting groove formed in the vibrating tine, wherein the first and second side faces are formed in sloping fashion so that the width of the vibrating tine gradually increases from the upper surface toward the lower surface, and the balance adjusting groove is formed in accordance with the sloping of the first and second side faces so that at least one of two dynamically perpendicular principal axes passing through a centroid on a cross section taken perpendicularly to a longitudinal direction of the vibrating tine becomes substantially parallel to the upper surface or the lower surface. The invention also provides a method for manufacturi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.