Patent ID: 6545388
Filing Date: 2003-04-08
Classification: H03H,Y10T

Abstract:
A surface acoustic wave device comprising:a piezoelectric substrate; at least one interdigital transducer electrode disposed on the piezoelectric substrate, the interdigital transducer electrode having a multi-layer film structure including: (a) at least one high specific gravity metal component containing layer having a film-thickness of at least about 10 nm and including as a major component a metal having a specific gravity of at least about 15; and (b) at least one low specific gravity metal component containing layer having a film-thickness of at least about 10 nm and including as a major component a metal having a specific gravity of up to about 10 and a bulk resistivity, at 20Â° C., of up to about 10Ã—10âˆ’8 &OHgr;Â·m.