Patent ID: 7646568
Filing Date: 2010-01-12
Classification: B82Y,G01R,G11B,Y10T

Abstract:
1. A process to manufacture a magnetic read head, comprising: providing a lower magnetic shield layer having an upper surface and then cleaning said upper surface; depositing a layer of tantalum, between about 5 and 20 Angstroms thick, on said cleaned surface; depositing a layer of Ru, between about 5 and 20 Angstroms thick, on said layer of tantalum whereby said tantalum and Ru layers together form a seed layer; depositing a layer of IrMn, between about 40 and 80 Angstroms thick, on said seed layer; on said IrMn layer, depositing an AP2 layer, whereby there is an exchange bias between said IrMn and AP2 layers; depositing a layer of AFM coupling material on said AP2 layer; depositing an AP1 layer on said layer of AFM coupling material; depositing a spacer layer on said AP1, said spacer layer being a non-magnetic conductor constrained to contact said free layer through pores in a nano-oxide layer, whereby said magnetic read head is a CCP CPP device having a GMR ratio of at least 10% with a R.A product of about 0.2 ohm.m depositing a free layer on said spacer layer; and forming a capping layer on said free layer.