Integrated circuit including sensor having injection molded magnetic material

摘要

An integrated circuit includes a magnetic field sensor and an injection molded magnetic material enclosing at least a portion of the magnetic field sensor.

主权项

1. An integrated circuit comprising:
a magnetic field sensor comprising a die including a magnetic field sensitive element; an injection molded magnetic material on a first side of the magnetic field sensor; and an injection molded plastic material on a second side of the magnetic field sensor opposite the first side, the injection molded plastic material directly contacting the second side of the magnetic field sensor, wherein the injection molded magnetic material includes a recessed portion centered with the die, the recessed portion including a first portion and a second portion, the second portion being wider than the first portion, and the first portion closer to the die than the second portion, wherein the width of the first portion is defined by first parallel sidewalls of the first portion, the first parallel sidewalls of the first portion perpendicular to a surface of the die that includes the magnetic field sensitive element, wherein the width of the second portion is defined by second parallel sidewalls of the second portion, the second parallel sidewalls of the second portion perpendicular to said surface of the die and separate from the first parallel sidewalls, and wherein the injection molded magnetic material includes third sidewalls extending between the first parallel sidewalls and the second parallel sidewalls, the third sidewalls only parallel to said surface of the die.