Patent ID: 6629342
Filing Date: 2003-10-07
Classification: H03H,Y10T

Abstract:
A method for producing an AT-cut quartz resonator comprising the steps of:forming metallic films on entire surfaces of two principal surfaces of an AT-cut quartz substrate; measuring a temperature-frequency characteristic of said quartz substrate on which said metallic films are formed; calculating an error in a cutting angle of said AT-cut quartz substrate based upon a result of said measuring; coating positive photoresists on entire surfaces of said metallic films of said AT-cut quartz substrate; setting apertures of masks, based upon said obtained error in said cutting angle, so that said apertures are slightly displaced apart in opposite directions along the Z-axis of quartz crystal pursuant to a calculated value that is obtained by calculating an error in a cutting angle of said AT-cut quartz substrate; exposing said positive photoresists through said masks; removing exposed portions of said positive photoresists; performing an etching treatment on said AT-cut quartz substrate so as to remove said metallic films except for unexposed positive photoresists; and removing said unexposed positive photoresists.