ELASTIC WAVE DEVICE AND PRODUCTION METHOD FOR SAME

摘要

Provided are an elastic wave device and a production method for the elastic wave device wherein layers do not easily separate during a dicing step. An elastic wave device 1 that is provided with: a piezoelectric body layer 2 that has a first main surface 2a and a second main surface 2b that is on the reverse side from the first main surface 2a; an acoustic reflection layer 5 that is laminated upon the first main surface 2a of the piezoelectric body layer 2; an excitation electrode that is provided to the piezoelectric body layer 2; and a support layer 6. As seen in plan view from the side of the second main surface 2b of the piezoelectric body layer 2, the acoustic reflection layer 5 is positioned so as to overlap at least the excitation electrode. At least as seen in plan view from the side of the second main surface 2b of the piezoelectric body layer 2, the support layer 6 is provided so as to surround the acoustic reflection layer 5.