Electricity: conductors and insulators – Boxes and housings – With electrical device
Reexamination Certificate
2007-01-23
2007-01-23
Ngo, Hung V. (Department: 2831)
Electricity: conductors and insulators
Boxes and housings
With electrical device
C324S11700H, C324S11700H, C324S251000
Reexamination Certificate
active
11144970
ABSTRACT:
An integrated circuit current sensor includes a lead frame having at least two leads coupled to provide a current conductor portion, and substrate having a first surface in which is disposed one or more magnetic field transducers, with the first surface being proximate the current conductor portion and a second surface distal from the current conductor portion. In one particular embodiment, the substrate is disposed having the first surface of the substrate above the current conductor portion and the second surface of the substrate above the first surface. In this particular embodiment, the substrate is oriented upside-down in the integrated circuit relative to a conventional orientation. A current conductor portion can be deposited proximate to a surface of the substrate and proximate to the one or more magnetic field sensors. With this arrangement, a current sensor is provided for which the one or more magnetic field transducers are very close to the current conductor portion, resulting in a current sensor having improved sensitivity. An insulating layer can be disposed between the current conductor portion and the substrate.
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Dickinson Richard
Doogue Michael C.
Friedrich Andreas P.
Gagnon Jay
Taylor William P.
Allegro Microsystems Inc.
Daly, Crowley & Mofford & Durkee, LLP
Ngo Hung V.
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