Magnetic field sensor integrated circuit with integral ferromagnetic material

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United States of America Patent

PATENT NO 11828819
APP PUB NO 20230057390A1
SERIAL NO

18046222

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Abstract

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A magnetic field sensor includes a lead frame, a passive component, semiconductor die supporting a magnetic field sensing element and attached to the lead frame, a non-conductive mold material enclosing the die and at least a portion of the lead frame, and a ferromagnetic mold material secured to a portion of the non-conductive mold material. The lead frame has a recessed region and the passive component is positioned in the recessed region. The ferromagnetic mold material may comprise a soft ferromagnetic material to form a concentrator or a hard ferromagnetic material to form a bias magnet.

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Patent Owner(s)

Patent OwnerAddress
ALLEGRO MICROSYSTEMS LLC955 PERIMETER ROAD MANCHESTER NH 03103-3353

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Burdette, Eric Reddick, US 14 291
David, Paul A Bow, US 55 489
Doogue, Michael C Bedford, US 85 4730
Friedrich, Andreas P Metz-Tessy, FR 76 1649
Lo, Marie-Adelaide Chene-Bougeries, CH 4 67
Shoemaker, Eric G Windham, US 11 105
Taylor, William P Amherst, US 182 5961
Vig, Ravi Concord, US 73 4448

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