| 摘要 |
A surface acoustic wave element 1 includes a substrate 2, an intermediate layer and a piezoelectric layer 4 laminated on the substrate 2, an IDT 5 disposed on the piezoelectric layer 4, a pair of reflectors 6 and 7 arranged on both sides of the IDT 5, and a protective layer 8 provided so as to cover the IDT 5 and the reflectors 6 and 7. The IDT 5, that is each of the electrode 5a and 5b, has a plurality of electrode fingers 51 juxtaposed with a prescribed spacing and the reflectors 6 and 7 have respectively a plurality of reflecting bodies 61 and 71. Further, the pitch Pr of the reflecting body of each reflector 6 and 7 is set to be smaller than the pitch Pt of the electrode finger of the IDT 5 and the ratio Pr/Pt is preferably set to be in the range of 0.7 to 0.9995. According to the surface acoustic wave element 1, the impedance characteristic and the insertion loss can be improved. Furthermore, electronic equipment having such surface acoustic wave element is provided.
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