Patent ID: 7301255

Claim:
A surface acoustic wave apparatus formed by mounting a surface acoustic wave element to a circuit board, wherein: said surface acoustic wave element includes a piezoelectric substrate, an electrode, formed on one main surface of said piezoelectric substrate, to be at a ground potential, and an IDT electrode formed on said one main surface of said piezoelectric substrate; said IDT electrode is an electrode comprising paired comb-teeth-shaped electrodes, each having plural electrode fingers, oppositely placed in such a manner that the electrode fingers of one comb-teeth-shaped electrode are positioned between the electrode fingers of the other comb-teeth-shaped electrode; either of said comb-teeth-shaped electrodes forming said IDT electrode is connected to said electrode to be at the ground potential via a resistor formed entirely on said one main surface of said piezoelectric substrate; and said resistor is made of a semiconductor.