Patent ID: 7579931

Claim:
A surface acoustic wave filter element comprising: a piezoelectric substrate; and a plurality of inter-digital transducer(IDT) electrodes formed on said piezoelectric substrate, wherein at least one of said plurality of IDT electrodes is connected to a balanced type terminal and other IDT electrodes are connected to balanced type terminals or unbalanced type terminals, first wiring electrode means which is connected to said at least one IDT electrode and second wiring electrode means which is connected to said other IDT electrodes are disposed on planes different from each other, and one of said first and second wiring electrode means is connected to electrode fingers on one side of said one or other IDT electrodes through at least one of one or plural electrode pads, one or plural via holes, and one or plural bumps, said electrode pads and/or said bumps being provided on at least said piezoelectric substrate.