/Acoustic Wave Device With Multilayer Piezoelectric Substrate For Reduced Spurious Signals
Abstract

An acoustic wave resonator is disclosed. The acoustic wave resonator can include a plurality of interdigital transducer electrodes and a multilayer piezoelectric substrate (MPS) adjacent the plurality of interdigital transducer electrodes. The MPS includes a first substrate layer of a piezoelectric material, and a second substrate layer of silicon that is bonded to the first layer. The silicon has a cut direction and/or acoustic wave propagation direction that is different from those of a silicon substrate. The silicon substrate has a cut direction and a propagation direction property defined by the silicon cut angle and the propagation direction.

Full Text

What is claimed is:

An acoustic wave resonator is disclosed. The acoustic wave resonator can include a plurality of interdigital transducer electrodes and a multilayer piezoelectric substrate (MPS) adjacent the plurality of interdigital transducer electrodes. The MPS includes a first substrate layer of a piezoelectric material, and a second substrate layer of silicon that is bonded to the first layer. The silicon has a cut direction and/or acoustic wave propagation direction that is different from those of a silicon substrate. The silicon substrate has a cut direction and a propagation direction property defined by the silicon cut angle and the propagation direction.
Timeline
Filed
05/19/2026
Published
09/17/2026
Granted
Not Available
IPC Codes(4)
H03H 9/02:Details
H03H 9/10:Mounting in enclosures
H03H 9/145:for networks using surface acoustic waves