Back to results
US 2018/0323769 A1Published application
Acoustic wave resonator, acoustic wave filter, multiplexer, communication apparatus, and method designing acoustic wave resonator
AssigneeKYOCERA Corporation
InventorDaisuke YAMAMOTO
Life of this patent
Estimating the term…
Abstract
An acoustic wave resonator includes a piezoelectric substrate and an IDT electrode on the top surface of the piezoelectric substrate. Between a resonance frequency and anti-resonance frequency due to a surface acoustic wave, one to four of at least one of resonance frequencies or anti-resonance frequencies due to bulk waves are located.
Claims16
An acoustic wave resonator comprising:
- a piezoelectric substrate and
- an IDT electrode on a top surface of the piezoelectric substrate, wherein
- between a resonance frequency and anti-resonance frequency due to a surface acoustic wave, one to four of at least one of resonance frequencies or anti-resonance frequencies due to bulk waves are located.
An acoustic wave filter comprising:
- a piezoelectric substrate,
- a support substrate bonded to a bottom surface of the piezoelectric substrate, and
- a plurality of IDT electrodes on a top surface of the piezoelectric substrate, wherein
- the plurality of IDT electrodes comprises
- a first IDT electrode and
- a second IDT electrode which is different in thickness from the first IDT electrode.
3 more elements
A method designing an acoustic wave resonator comprising:
- an electrode thickness setting step of specifying a thickness of electrode fingers of an IDT electrode whereby in a case where a pitch of the electrode fingers is a predetermined initial value, a resonance frequency and an anti-resonance frequency due to a surface acoustic wave are located on the two sides of at least one of a resonance frequency and anti-resonance frequency due to a bulk wave and
- a step of specifying the pitch of the electrode fingers by which the above one frequency coincides with a predetermined target frequency by the thickness of the electrode fingers specified in the electrode thickness setting step.
Dependencies are inferred from the claim text.