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US 5,883,567 AGranted
Packaged integrated circuit with magnetic flux concentrator
AssigneeAnalog Devices, Inc.
InventorPaul V. Mullins, Jr.
Life of this patent
Estimating the term…
Abstract
A flux concentrator made of a high permeability material is enclosed in a semiconductor package with a magnetic sensing integrated circuit to improve the uniformity and magnitude of the magnetic field sensed by the sensor.
Claims13
An apparatus comprising:
- a paddle;
- an integrated circuit die mounted on the paddle;
- a flux concentrator made of a material with permeability of at least about 8000 Gauss/oersted at a flux density B=20 Gauss and positioned at least close to the paddle;
- and
- a semiconductor package enclosing the integrated circuit die and the paddle and at least partially enclosing the flux concentrator together in a single packaged device.
2 more elements
A sensing assembly comprising:
- a magnetic field source;
- a circuit board positioned near the magnetic field source;
- and
- a packaged chip including:
- leads extending away from the chip and electrically coupled to the circuit board,
- an integrated die including a sensor for sensing a magnetic field,
- wire bonds electrically coupling the integrated die and the leads,
- a flux concentrator made of a high permeability material and disposed at least close to the integrated sensor die, wherein the high permeability material has a permeability of at least 8000 Gauss/oersted at a flux density B=20 Gauss, and
- a package material enclosing the integrated sensor die and at least partially enclosing the flux concentrator.
6 more elements
Dependencies are inferred from the claim text.