Patent ID: 7413636
Filing Date: 2008-08-19
Classification: B82Y,G01R,G11B

Abstract:
1. A method of fabricating a dual spin valve (SV) sensor which comprises the steps of: sputter deposting the multilayer dual SV sensor including a first spin valve (SV) stack, a second spin valve (SV) stack and a longitudinal bias stack disposed between the first and second SV stacks the first spin valve stack including a first magnetic free layer, and the second spin valve stack including a second magnetic free layer; wherein said depositing a longitudinal bias stack further comprises: annealing the dual SV sensor at a first temperature in a first magnetic field oriented in a transverse direction perpendicular to an air bearing surface; and annealing the dual SV sensor at a second temperature in a second magnetic field oriented in a longitudinal direction parallel to said air bearing surface, wherein said second temperature is less than said first temperature and said second magnetic field has a magnitude smaller than said first magnetic field.