Patent ID: 11863152
Assignee: MURATA MANUFACTURING CO., LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. An elastic wave device including a piezoelectric film, the elastic wave device comprising:
a high-acoustic-velocity supporting substrate in which an acoustic velocity of a bulk wave propagating therein is higher than an acoustic velocity of an elastic wave propagating in the piezoelectric film;
a low-acoustic-velocity film stacked on the high-acoustic-velocity supporting substrate, in which an acoustic velocity of a bulk wave propagating therein is lower than an acoustic velocity of a bulk wave propagating in the piezoelectric film;
the piezoelectric film stacked on the low-acoustic-velocity film; and
an IDT electrode disposed on a surface of the piezoelectric film; wherein
the piezoelectric film is composed of LiNbO3.