Patent ID: 9274184
Filing Date: 2016-03-01
CPC Classification: B82Y,G01R,G11B,H01F

Claim Text:
1. A method of fabricating a magnetic sensor, comprising: depositing a plurality of magneto-resistive (MR) device layers; patterning said MR device layers to form a MR stripe having a first bottom surface, a top layer that is a magnetically free layer having a first top surface, a first thickness, an aspect ratio of at least depositing and patterning a layer of soft magnetic material to form a pair of flux absorbing stripes each having a second edge facing the center plane, a second top surface, a second bottom surface, and a second thickness, a product of flux absorbing stripe magnetization times the second thickness is greater than a product of free layer magnetization times the first thickness; and positioning said flux absorbing stripes so that the second edge of a first flux absorbing stripe is offset from one of the opposing first edges of the free layer along a second direction that is orthogonal to the center plane, and the second edge of a second flux absorbing stripe is offset from another of the opposing first edges of the free layer along the second direction, and with adjacent pairs of opposing first edges and second edges aligned parallel to each other such that a portion of the free layer and MR stripe is aligned above each second top surface, or a portion of the free layer and MR stripe is aligned below each second bottom surface.