Patent ID: 8405284
Filing Date: 2013-03-26
Classification: H01L,H03H

Abstract:
1. A piezoelectric device, comprising: a lid plate comprising a concavity on its inner major surface; a chip plate comprising a tuning-fork type piezoelectric vibrating piece and an outer frame surrounding the tuning-fork type piezoelectric vibrating piece; and a base plate comprising a concavity on its inner major surface, wherein the chip plate is sandwiched between and bonded to the lid plate and base plate to form a package containing the piezoelectric vibrating piece inside the package; wherein the tuning-fork type piezoelectric vibrating piece has an X-direction width and a Y-direction length and comprises a base and at least pair of vibrating arms extending in the Y-direction from the base; the tuning-fork type piezoelectric vibrating piece is coupled to the outer frame by a pair of supporting arms extending outboard of the vibrating arms in the Y-direction between the base and the outer frame and connected to the outer frame by respective connecting portions; the lid plate includes a respective base-movement buffer situated in the concavity at a Y-coordinate corresponding to a Y-coordinate of the base; and the base plate includes a respective base-movement buffer situated in the concavity at a Y-coordinate corresponding to a Y-coordinate of the base.