Patent ID: 8445185
Filing Date: 2013-05-21
Classification: G04R,H03H,Y10T

Abstract:
1. A method for preparing piezoelectric reeds, comprising: (a) providing a wafer substantially consistent in thickness across the wafer; (b) inspecting a reusable photomask to find if there is any defect therein, wherein the photomask comprises sections with different opacities patterned to draw a series of geometric representations representative of the piezoelectric reeds; (c) changing a geometry of one of the representations in the photomask in which a defect is found, to a degree sufficient for a piezoelectric reed resulting from the changed geometric representation to behave electrically differently from other reeds resulting from unchanged geometric representations; and (d) placing the photomask in contact with the wafer and irradiating the wafer through the photomask.