Patent ID: 6801411
Filing Date: 2004-10-05
Classification: B82Y,G01R,G11B

Abstract:
A dual-stripe current-pinned spin valve magnetoresistive read sensor, comprising:a first free layer having a first free thickness; a second free layer having a second free thickness; a single insulation layer formed of electrically insulating material and disposed between the first and second free layers; a first spacer layer formed of a conductive material, the first free layer being disposed between the insulation layer and the first spacer layer; a first pinned layer having a first pinned thickness, the first spacer layer being disposed between the first free layer and the first pinned layer; a second spacer layer formed of a conductive material, the second free layer being disposed between the insulation layer and the second spacer layer; a second pinned layer having a second pinned thickness, the second spacer layer being disposed between the second free layer and the second pinned layer; a first lead set electrically connected to the first spacer layer by a first hard bias structure and configured to pass a first biasing current through the first spacer layer in a direction; and a second lead set electrically insulated from the first lead set and electrically connected to the second spacer layer by a second hard bias structure and configured to pass a second biasing current in the direction wherein the first free thickness and the second free thickness are in the range of about 40 angstroms to about 100 angstroms.