Patent ID: 11936367
Assignee: SKYWORKS SOLUTIONS, INC.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 14:
15. An acoustic wave filter comprising:
a temperature compensation layer;
a first acoustic wave resonator including a first interdigital transducer electrode having a central region and first and second edge regions on opposing sides of the central region, and a first velocity reduction cover extending over at least a portion of the central region of the first interdigital transducer electrode and over at least a portion of the temperature compensation layer, the first velocity reduction cover arranged to cause a velocity of an acoustic wave generated by the first acoustic wave resonator to be reduced, the first velocity reduction cover having a multilayer structure including a first sublayer at least partially located over the central region and disposed over the first and second edge regions, and a second sublayer that extends parallel to the first sublayer and is located only over the first and second edge regions of the first interdigital transducer electrode; and
a second acoustic wave resonator including a second interdigital transducer electrode and a second velocity reduction cover extending over at least a portion of a central region of the second interdigital transducer electrode and over at least a second portion of the temperature compensation layer, the second velocity reduction cover arranged to cause a velocity of an acoustic wave generated by the second acoustic wave resonator to be reduced, the first and second acoustic wave resonators being included in a plurality of acoustic wave resonators arranged to filter a radio frequency signal.