Patent ID: 11870421
Assignee: SKYWORKS SOLUTIONS, INC.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A surface acoustic wave resonator comprising:
a piezoelectric substrate;
interdigital transducer electrodes disposed on an upper surface of the piezoelectric substrate, the interdigital transducer electrodes including first bus bar electrode regions spaced apart from each other in a transverse direction perpendicular to a propagation direction of a surface acoustic wave to be excited, an overlapping region sandwiched between the first bus bar electrode regions, and gap regions defined between the respective first bus bar electrode regions and the overlapping region in the transverse direction, the interdigital transducer electrodes including first bus bar electrodes disposed within each of the first bus bar electrode regions, and electrode fingers extending from each of the first bus bar electrodes, the electrode fingers extending from one bus bar electrode being interleaved with the electrode fingers extending from the other first bus bar electrode within the overlapping region;
a second bus bar electrode disposed in parallel to a respective first bus bar electrode within each of the gap regions, each of the second bus bar electrodes extending intermittently and formed from conductive traces extending from only single sides of the electrode fingers;
a first dielectric film covering the interdigital transducer electrodes and the upper surface of the piezoelectric substrate for temperature compensation; and
a second dielectric film covering the first dielectric film.