SURFACE ACOUSTIC WAVE DEVICE, AND COMMUNICATION FILTER USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a surface acoustic wave filter and a communication filter using the same, capable of forming a fine electrode having a relatively thin film thickness by using inexpensive material. SOLUTION: In the surface acoustic wave device formed an interdigital electrode 10 on a piezoelectric substrate, a main component of electrode material forming the interdigital electrode 10 is copper. COPYRIGHT: (C)2006,JPO&NCIPI