Patent ID: 8941954
Filing Date: 2015-01-27
Classification: G01R,G11B,H01F

Abstract:
1. A magnetic read head, comprising: a sensor stack that includes a magnetic free layer structure and a magnetic pinned layer structure, the magnetic free layer structure having a back edge that extends from an air bearing surface to a first stripe height and having first and second laterally opposed sides the distance between which defines a track-width, and wherein the magnetic pinned layer structure has a back edge that extends significantly beyond the first stripe height and also extends laterally significantly beyond the first and second sides of the magnetic free layer; first and second soft magnetic bias structures extending laterally outward from the first and second sides of the free layer structure; and a leading magnetic shield and a trailing magnetic shield, the sensor stack being sandwiched between the leading magnetic shield and the trailing magnetic shield; wherein each of the first and second soft magnetic bias structures is magnetically coupled with the trailing magnetic shield.