Patent ID: 11942922
Assignee: MURATA MANUFACTURING CO., LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An acoustic resonator device comprising:
a substrate;
a lithium niobate plate having front and back surfaces, the back surface facing the substrate, a portion of the lithium niobate plate forming a diaphragm that is over a cavity of the acoustic resonator device; and
an interdigital transducer (IDT) at the lithium niobate plate such that interleaved fingers of the IDT are on the diaphragm, the IDT and the lithium niobate plate configured such that a radio frequency signal applied to the IDT excites a primary shear acoustic mode in the diaphragm;
wherein Euler angles of the lithium niobate plate are [0°, β, 0°], where β is greater than or equal to 40° and less than or equal to 70°
wherein a first pitch/mark zone of the interleaved fingers has a pitch between a pair of adjacent interleaved fingers equal to a first pitch value P1 and a mark of at least one of the interleaved fingers equal to a first mark value M1; and
wherein a second pitch/mark zone of the interleaved fingers has a pitch between a pair of adjacent interleaved fingers equal to a second pitch value P2 not equal to P1 and a mark of at least one of the interleaved fingers equal to a second mark value M2 not equal to M1.