| 摘要 |
<p>An electrode material for a surface acoustic wave device comprising laminates in at least two stages, each laminate being formed by laminating a second metal layer (5) on a first metal layer (4), wherein the first metal layer (4) uses a metal having a diffusion coefficient to Al which is smaller than a self-diffusion coefficient of Al, and the second metal layer (5) uses a ternary or higher Al alloy in which at least two kinds of metals - at least one kind of metal solid-dissolved to Al at room temperature and at least one kind of metal which segregates in an Al grain boundary or forms an intermetallic compound with Al at room temperature - are added, whereby a surface acoustic wave device excellent in power resistance, capable of using a conventional pattern forming technique, being thermally stable and preventing an insertion loss increase can be provided.</p> |
