Ferrite-semiconductor resonator and filter
AssigneeMotorola, Inc.
InventorsMichael Dydyk, John M. Golio, Robert J. Higgins, Jr., Aristotelis Arvanitis
Life of this patent
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Abstract
A semiconductor substrate with electronic circuitry (e.g., a transmitter or receiver) formed thereon and including interconnects. A ferrite disk bonded to the substrate so as to interact with the interconnects, when the ferrite disk is activated by a substantially constant magnetic field thereacross, to provide frequency selectivity within the electronic circuitry. A permanent magnet positioned adjacent to the ferrite disk to provide a substantially constant magnetic field across the ferrite disk so that the magnetic field produces resonance in the ferrite disk.
Claims19
A ferrite-semiconductor resonator comprising:
- a semiconductor substrate;
- electronic circuitry formed on the semiconductor substrate and including interconnects;
- and
- a ferrite disk bonded to the semiconductor substrate by insulating material so as to be insulated from the electronic circuitry and to interact with the interconnects of the electronic circuitry, when the ferrite disk is activated by a substantially constant magnetic field thereacross, to provide frequency selectivity within the electronic circuitry.
A ferrite-semiconductor resonator comprising:
- a semiconductor substrate;
- electronic circuitry formed on the semiconductor substrate and including interconnects;
- a first layer of insulating material formed on the substrate;
- and
- a ferrite disk positioned on the first layer of insulating material and bonded to the semiconductor substrate by the layer of insulating material so as to interact with the interconnects of the electronic circuitry, when the ferrite disk is activated by a substantially constant magnetic field thereacross, to provide frequency selectivity within the electronic circuitry and a second layer of insulating material deposited thereover.
A ferrite-semiconductor resonator comprising:
- a semiconductor substrate having first and second major surfaces;
- electronic circuitry formed on the first major surface of the semiconductor substrate and including interconnects;
- an insulating layer formed over at least portions of the electronic circuitry and the interconnects;
- a ferrite disk bonded to the insulating layer so as to interact with the interconnects of the electronic circuitry, when the ferrite disk is activated by a substantially constant magnetic field thereacross, to provide frequency selectivity within the electronic circuitry;
- and
- a permanent magnet positioned adjacent to the ferrite disk, the permanent magnet including first and second flat members of magnetic material, at least one of which is permanently magnetized, with the first flat member being positioned in abutting engagement with and parallel to the second major surface of the substrate and the second flat member being positioned adjacent to and parallel with the ferrite disk to provide a substantially constant magnetic field across the ferrite disk, the magnetic field producing resonance in the ferrite disk.
Dependencies are inferred from the claim text.