| 摘要 |
PROBLEM TO BE SOLVED: To improve reflectivity of a reflector and to obtain the small reflector by suppressing reflected waves losses due to mode conversion in bulk waves, etc. SOLUTION: A surface acoustic wave device is provided having a piezoelectric baseboard 10, an interdigital transducer (1a and 1b) formed on the piezoelectric baseboard 10 and the reflector consisting of multiple metal strip electrodes (2a, 2c, 3a and 3d) which are formed on the baseboard 10; and the device is constituted, such that the film thickness of a metal strip constituting the reflector is made thicker, the larger the reflectivity becomes, going away from the interdigital transducer.
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