Patent ID: 8898874

Claim:
A method of fabricating a plurality of piezoelectric vibrating pieces from wafer, the method comprising: a film forming step of forming metal films respectively on both faces of the wafer, wherein the film forming step comprises forming a metal film overlap region where a number of layers of the metal films overlaps around a side face of the wafer and extending inwardly from an outer peripheral end of the wafer while forming the metal films on both faces of the water; a patterning step of removing the metal film overlap region by a constant distance inwardly from the outer peripheral end over an entire periphery thereof which encompasses the side face of the wafer, and thereafter, patterning the remaining metal film to an outer shape of the plurality of piezoelectric vibrating pieces; an outer shape forming step of forming outer shapes of the plurality of piezoelectric vibrating pieces at the wafer a size of which is reduced by an amount of the constant distance by selectively removing the wafer by wet etching by using as a mask, the remaining the patterned metal film; and a removing step of removing the remaining patterned metal film.