Patent ID: 6134762
Filing Date: 2000-10-24
Classification: H03H,Y10T

Abstract:
A method for manufacturing a piezoelectric resonant part which includes a piezoelectric substrate having electrode patterns formed on opposing main surfaces of said piezoelectric substrate, said substrate being sandwiched between a pair of protective substrates, said electrode patterns including vibrating electrodes, said method comprising steps of:forming a respective first adhesive layer made of a first adhesive material on a main surface of each of said protective substrates;forming a respective second adhesive layer made of a second adhesive material directly which is harder than said first adhesive material on each of said first adhesive layers; andlaminating said protective substrates to said respective main surfaces of said piezoelectric substrate with said respective second adhesive layers abutting said respective main surfaces of said piezoelectric substrate,said first and second adhesive layers having openings formed therein which cooperate with each other to define vibration spaces in which said vibrating electrodes vibrate, a height of said vibration spaces as measured in a direction perpendicular to said main surfaces being defined by said openings in said adhesive layers only.