Electrode material for surface acoustic wave devices and surface acoustic wave device using the same
AssigneesHitachi Denshi Kabushiki Kaisha, Hitachi, Ltd.
InventorsHiroomi Kojima, Toyoji Tabuchi, Mitsutaka Hikita, Kazuhito Kurosawa, Atsushi Sumioka
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Abstract
A surface acoustic wave device has its inter--digital transducers made of a 3--metal alloyed material consisting of aluminum, copper and magnesium.
Claims7
An electrode material comprising three-metal alloyed material consisting of aluminum, copper and magnesium, wherein said three-metal alloyed material of aluminum, copper and magnesium has a composition Al-Cu-Mg (100-x-y, y, x) which meets:
- 0<y<3.5, 0<x<2.0 0<x+y.ltoreq.3.4.
An electrode material comprising three-metal alloyed material consisting of aluminum, copper and magnesium, wherein said three-metal of aluminum, copper and magnesium, wherein said three-metal alloyed material of aluminum, copper and magnesium has a composition Al-Cu-Mg (100-x-y, y, x) which meets:
- 1.8.ltoreq.y.ltoreq.2.2, 0.2.ltoreq.x .ltoreq.1.6, 0<x+y .ltoreq.3.4.
A surface acoustic wave device having a thin film stripe on a substrate which propagates a surface acoustic wave, wherein said thin film stripe is formed of three-metal alloyed material consisting of aluminum, copper and magnesium, wherein said three-metal alloyed material of aluminum, copper and magnesium has a composition Al-Cu-Mg (100-x-y, y, x) which meets:
- 0<y<3.5, 0<x<2.0, 0<x+y.ltoreq.3.4.
Dependencies are inferred from the claim text.