| 摘要 |
A surface acoustic wave device includes an electrode and a dielectric layer laminated on a piezoelectric substrate, in which the electrode includes a first electrode film containing Pt, Au, Ag, or Cu and a second electrode film containing Al, the normalized film thickness h/λ of the first electrode film is about 0.005 or more and at most about 0.015 in the case of Pt, the normalized film thickness h/λ of the Al film is about 0.06 or more and at most about 0.185, and the normalized film thickness h/λ of the dielectric layer is about 0.2 or less. |
