| 摘要 |
PROBLEM TO BE SOLVED: To provide a surface acoustic wave element with superior heat radiation for heat generated at an input of a high power signal. SOLUTION: In the surface acoustic wave element, an IDT electrode 2, reflective devices 9 arranged on both sides of the propagation direction of the surface acoustic wave of the IDT electrode 2, and a ring conductor 17 connected to the reflective devices 9 and surrounding the IDT electrode 2 and the reflective devices 9 are provided on a piezo-electric substrate 1. In this case a heat radiation path from the IDT electrode 2, which generates heats by the input of a high power signal is arranged at a conductive part for connecting the piezo-electric substrate 1 and a wiring board mounting the piezo-electric substrate 1 and at the ring conductor 17 through the reflective device 9, so the heat radiation becomes superior. As a result, electric power resistance and reliability are enhanced. COPYRIGHT: (C)2006,JPO&NCIPI
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