US 12,706,586 B2 · Electroacoustic resonator

Abstract

An electroacoustic resonator comprises a substrate with a piezoelectric material and an interdigital electrode structure on a top side of the substrate. The electrode structure comprises a first electrode and a second electrode each with a busbar and a plurality of fingers. The region of the top side between the two busbars is subdivided into two barrier regions, two trap regions and one track region, the trap regions being located between the two barrier regions and the track region being located between the two trap regions. At least some fingers each comprise one barrier portion, two trap portions and one track portion. The barrier portion is associated with the barrier region closest to the busbar assigned to the finger, the trap portions are each associated with one of the trap regions and the track portion is associated with the track region.

Claims18

Dependent claims

An electroacoustic resonator, comprising:

a piezoelectric substrate;
a first electrode including a first busbar, wherein the first electrode is part of an electrode structure formed on the piezoelectric substrate;
and
a first plurality of fingers including at least one stub finger coupled to the first electrode in a first barrier region of the electrode structure and at least one finger coupled to the first electrode and extending to a first trap region of the electrode structure, wherein a width of the at least one stub finger in the first barrier region is less than a width of the at least one finger in the first barrier region.

1 more element

An electroacoustic resonator, comprising:

a piezoelectric substrate;
and
an interdigital electrode disposed on or above the piezoelectric substrate and comprising:
a first busbar;
a second busbar;
a first plurality of fingers extending from the first busbar towards the second busbar;
a second plurality of fingers extending from the second busbar towards the first busbar and interdigitated with the first plurality of fingers;
and
a first plurality of stub fingers extending from the first busbar, each of the first plurality of stub fingers extending towards a corresponding finger of at least a portion of the second plurality of fingers, wherein a gap exists between an end of each of the first plurality of stub fingers and the corresponding finger of the at least the portion of the second plurality of fingers, and wherein a width of each of the first plurality of stub fingers is less than a width of each finger of the first plurality of fingers between the first busbar and the gap.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application

18/796,105Filed 6 Aug 2024 · continuation

Priority

DE 10 2019 120 942.02 Aug 2019

Published

US 2025/0062742 A120 Feb 2025

Granted

11 Aug 2026

Term ends

Not estimatedThe source records don’t support an estimate.

Classification8 codes

H03H 9/02992
Of surface acoustic wave devices: details of bus bars, contact pads or other electrical connections for finger electrodes
H03H 9/1457
Transducers of particular shape or position: transducers having different finger widths
H03H 9/14532
Distributed tap: series weighting; Transverse weighting
H03H 9/15
Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators: constructional features of resonators consisting…

Family

Application17/597,467Parent of this continuation · filed 14 Jul 2020

PCT/EP2020/069907Parent of this continuation · filed 14 Jul 2020

US 2025/0062742 A1Pre-grant publication · published 20 Feb 2025

US 12,074,582 B2Parent of this continuation

US 2022/0286106 A1Published application

US 12,706,586 B2This patent

From the US filing history. Foreign family members aren’t listed.

Electroacoustic resonator

Life of this patent

Electroacoustic resonator

Life of this patent

Abstract

Claims18