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US 10,587,242 B2Granted
Acoustic wave filter and method for manufacturing the same
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorWon Kyu Jeung
Life of this patent
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Abstract
An acoustic wave filter includes a substrate, a first resonator disposed on the substrate, a second resonator disposed on the substrate to be spaced apart from the first resonator, a connector electrically connecting the first and second resonators, and a variable capacitor formed in the connector to tune a pass band frequency of the acoustic wave filter.
Claims17
An acoustic wave filter comprising:
- a substrate;
- a first resonator disposed on the substrate;
- a second resonator disposed on the substrate and spaced apart from the first resonator;
- and
- a variable capacitor comprising a first electrode electrically connected to the first resonator, and a second electrode electrically connected to the second resonator,
- wherein the first electrode comprises a first plate, and first extensions extending from the first plate, the first extensions being spaced apart from each other,
- wherein the second electrode comprises a second plate, and second extensions extending from the second plate, the second extensions being spaced apart from each other, and disposed in spaces formed by the first extensions, such that the first extensions and second extensions are alternately disposed, and
- wherein spaces between the first extensions and the second extensions are filled with a dielectric material.
5 more elements
An acoustic wave filter comprising:
- a first resonator disposed on a substrate;
- a second resonator disposed on the substrate and spaced apart from the first resonator;
- and
- a variable capacitor comprising a first electrode electrically connected to the first resonator, and a second electrode electrically connected to the second resonator,
- wherein the first electrode comprises a first plate, and first extensions extending from the first plate, the first extensions being spaced apart from each other,
- wherein the second electrode comprises a second plate, and second extensions extending from the second plate, the second extensions being spaced apart from each other, and disposed in spaces formed by the first extensions, such that the first extensions and second extensions are alternately disposed, and
- wherein a height of the first extensions, measured from a bottom surface of the first extensions to a top surface of the first extensions, is greater than a width of the first extensions, measured from one side surface to another side surface of the first extensions.
4 more elements
A method for manufacturing an acoustic wave filter, the method comprising:
- forming a first connector and a second connector on a substrate;
- forming a variable capacitor including a first electrode disposed in the first connector and a second electrode disposed in the second connector;
- forming a first resonator and a second resonator on the substrate to be connected to the first connector and the second connector, respectively, and be disposed on two terminals of the variable capacitor;
- and
- tuning a pass band frequency of the acoustic wave filter by applying a voltage to the variable capacitor,
- wherein the first electrode comprises a first plate having first extensions extending therefrom, the first extensions being spaced apart from each other,
- wherein the second electrode comprises a second plate having second extensions extending therefrom, the second extensions being spaced apart from each other,
- wherein the second extensions are disposed in spaces formed by the first extensions, such that the first extensions and the second extensions are alternately disposed, and
- wherein spaces between the first extensions and the second extensions are filled with a dielectric material.
6 more elements
Dependencies are inferred from the claim text.