Patent ID: 8531092
Filing Date: 2013-09-10
Classification: H01L,H03H

Abstract:
1. A surface-mountable piezoelectric device, comprising: a piezoelectric vibrating piece that vibrates at a predetermined frequency; and a package comprising at least a cover and a base-substrate formed of glass or piezoelectric material, the piezoelectric vibrating piece being sealed within the package, wherein the base-substrate and cover have respective inner and outer main surfaces with respective peripheral regions; at least one inner main surface comprises a respective frame-shaped metallic film extending around the respective peripheral region, the frame-shaped metallic film being used for sealing the base-substrate and cover together using a eutectic material to form the package; the outer main surface of the base-substrate including at least one mounting terminal; and at least one of the frame-shaped metallic film and mounting terminal comprises a layer of chromium formed on a surface of the glass or piezoelectric material, a layer of NiW alloy formed on the layer of chromium, and a layer of gold formed on the layer of NiW alloy.