| 摘要 |
In order to provide a surface acoustic wave element which is excellent in various kinds of characteristics (especially temperature characteristic), and electronic equipment having such surface acoustic wave element, a surface acoustic wave element (1) comprises, as a substrate (2), a quartz-rotator Y plate whose Euler angle is expressed as (0, &thetas;, psi ), and IDT 3 and reflectors (4) and (5) provided on this substrate 2. The IDT 3 is formed of Al as its main ingredient, and arranged so that an angle psi , which the propagation direction of a surface acoustic wave and the X-axis of the quartz-rotator Y plate make, may become 90 +/- 10 DEG , and a normalized film-thickness H/ lambda of IDT 3, and the cut angle &thetas; are set as to satisfy the following Relation A. (Relation A) <DF>&thetas;min <= &thetas; <= &thetas;max (where, &thetas; = 129 through 144 DEG ) &thetas;min = 857.06(H/ lambda )<2> + 23.656(H/ lambda ) + 123.68 &thetas;max = 2502.4(H/ lambda )<2> + 73.1(H/ lambda ) + 121.7 </DF> <IMAGE> |
