Patent ID: 7003875
Filing Date: 2006-02-28
Classification: H03H,Y10T

Abstract:
1. A method for manufacturing a piezo-resonator for obtaining a signal having a specified resonant frequency by using a lower electrode formed on a substrate and an upper electrode formed on a side opposite to said lower electrode with a piezoelectric film being interposed between said lower electrode and said upper electrode, said method comprising: forming an upper electrode layer on said piezoelectric film; coating said upper electrode layer with a resist and performing patterning on said resist so as to have a shape of said upper electrode; masking the patterned resist and removing said upper electrode layer other than masked portions and forming two or more first upper electrodes; removing said resist; coating said first upper electrodes with a second resist and performing patterning on said second resist so that said first upper electrodes are partially exposed; etching the exposed first upper electrodes by a specified thickness to form a second upper electrode; and removing said second resist.