Integrated lateral short circuit for a beneficial...

Details Integrated lateral short circuit for a beneficial... Integrated lateral short circuit for a beneficial...

2011-01-18

2011-01-18

Lee, Kyung (Department: 2833)

Electrical resistors

Mechanically variable

Resistance value varied by removing or adding material

C338S03200R

Reexamination Certificate

active

07872564

ABSTRACT:
The invention relates to a magnetoresistive device formed to sense an externally applied magnetic field, and a related method. The magnetoresistive device includes a magnetoresistive stripe formed over an underlying, metallic layer that is patterned to produce electrically isolated conductive regions over a substrate, such as a silicon substrate. An insulating layer separates the patterned metallic layer from the magnetoresistive stripe. A plurality of conductive vias is formed to couple the isolated regions of the metallic layer to the magnetoresistive stripe. The conductive vias form local short circuits between the magnetoresistive stripe and the isolated regions of the metallic layer to alter the uniformity of a current flow therein, thereby improving the position and angular sensing accuracy of the magnetoresistive device. In an advantageous embodiment, the metallic layer is formed as electrically conductive stripes oriented at approximately a 45° angle with respect to an axis of the magnetoresistive device.

REFERENCES:
patent: 2003/0197503 (2003-10-01), Kawano et al.
patent: 2005/0275941 (2005-12-01), Liu et al.
patent: 2006/0202291 (2006-09-01), Kolb et al.
patent: 101 50 233 (2003-05-01), None
Schmeiβer, F., et al., “Rotational Speed Sensors KMI15/16,” Philips Semiconductors Application Note AN98087, Jan. 11, 1999, pp. 1-30, Philips Electronics N.V.

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