Patent ID: 6700300
Filing Date: 2004-03-02
Classification: H03H

Abstract:
A surface acoustic wave device comprising a piezoelectric substrate and inter-digital electrodes formed on the piezoelectric substrate, wherein:the piezoelectric substrate has a crystal structure of the Ca3Ga2Ge4O14 type and is represented by the chemical formula, Ca3TaGa3Si2O14; and a cut angle of the piezoelectric substrate cut out of the single crystal and a direction of propagation of surface acoustic waves on the piezoelectric substrate represented in terms of Euler's angles (&phgr;, &thgr;, &psgr;) are found in an area represented by âˆ’2.5Â°&lE;&phgr;&lE;2.5Â°, 30Â°&lE;&thgr;&lE;90Â°, and âˆ’65Â°&lE;&psgr;&lE;65Â°.