| 摘要 |
To enhance a heat dissipation property and achieve stabilization of a resonance characteristic in an elastic wave resonator including an IDT electrode weighted so as to have a plurality of apodization local maximum value portions, the elastic wave resonator includes an IDT electrode located on a piezoelectric substrate, the IDT electrode is apodization-weighted so that a plurality of local maximum values occur in apodization in an elastic wave propagation direction, heat dissipation electrodes are provided in at least one apodization local minimum value portion occurring in the elastic wave propagation direction in the IDT electrode, and when it is assumed that direction dimension widths of the heat dissipation electrodes in the elastic wave propagation direction are A and the dimension of about ½ of a wave length of a propagating elastic wave is B, B<A is satisfied. |
