Barber pole structure for magnetoresistive sensors and...

Electricity: measuring and testing – Magnetic – Magnetometers

Reexamination Certificate

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C428S692100, C428S682000

Reexamination Certificate

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06850057

ABSTRACT:
A method of making a magnetorestrictive sensor involves the deposition of a magnetorestrictive strip over a substrate, the deposition of an insulating layer over the magnetorestrictive strip, the etching of barber pole windows through the insulating layer, the deposition of a conductive material over the insulating layer and into the barber windows, and the etching away of the conductive material between the barber pole windows so as to form barber poles. In this manner, the formation of the barber poles is controlled by the windows formed in the insulating layer.

REFERENCES:
patent: 4847584 (1989-07-01), Pant
patent: 5719494 (1998-02-01), Dettmann et al.
patent: 197 40 408 (1998-03-01), None
patent: 403219682 (1991-09-01), None
J.E. Lenz et al., “A High-Sensitivity Magnetoresistive Sensor”, Honeywell Systems and Research Center, no date.
M. Endoh et al., “Highly Sensitive Thin Film Magnetoresistive Sensor With Good Linearity”, pp. 210-214, no date.
Article by Bharat B. Pant with Honeywell Solid State Electronics Division), Title: Magnetoresistive Sensors found in the Scientific Honeywell, Fall 1987, pp. 29-34.

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