Patent ID: 8120233

Claim:
A tuning-fork type piezoelectric vibrating piece, comprising: a base having a proximal edge, a distal edge, and opposing side edges; a pair of vibrating arms extending in a longitudinal direction from the distal edge; respective excitation electrodes situated on the vibrating arms; extraction electrodes situated on the base and connected to respective excitation electrodes: and connecting terminals connected to respective extraction electrodes and comprising a eutectic alloy, wherein the excitation electrodes, extraction electrodes, and connecting terminals comprise (i) a first metal layer consisting of a metal selected from the group consisting of Cr, Ni, Ti, Al, and W, (ii) an oxide layer of an oxidized form of the metal of the first metal layer, (iii) a foundation layer consisting of a metal selected from the group consisting of Cr, Ni, Ti, Al, and W formed on the oxide layer, and (iv) a second metal layer consisting of a metal selected from the group consisting of Au and Ag formed on the foundation layer, wherein a portion of the second metal layer is removed at designated loci on the extraction electrodes so that the second metal layer on the excitation electrode and the second metal layer on the connecting terminals are not formed as one connected metal film.