Patent ID: 6437668
Filing Date: 2002-08-20
Classification: H03H

Abstract:
A surface acoustic wave device comprising:a piezoelectric substrate made of a piezoelectric material; and at least one IDT including electrode fingers and disposed on said piezoelectric substrate, the at least one IDT being made of at least one of a metal and an alloy having a higher specific weight than that of the piezoelectric material of said piezoelectric substrate so as to excite Shear Horizontal (SH) waves; wherein a ratio of a width of at least one of the electrode fingers defining said IDT relative to a sum of the width of the at least one of the electrode fingers and a space between adjacent ones of the electrode fingers is from about 0.55 to about 0.85; and said piezoelectric substrate is a quartz substrate having Euler angles of approximately (0Â°, 121Â° to 136Â°, and 87Â° to 93Â°).