Patent ID: 7372673
Filing Date: 2008-05-13
Classification: B82Y,G01R,G11B

Abstract:
1. A magnetoresistive effect transducer comprising: a substrate; a lower magnetic shield layer formed on said substrate; a pinning layer formed on said lower magnetic shield layer; a pinned layer formed on said pinning layer, said pinning layer providing an exchange coupling with said pinned layer; a non-magnetic layer formed on said pinned ferromagnetic layer, said non-magnetic layer being made of one of insulating material and conductive material; a patterned free layer formed on said non-magnetic layer; a patterned interface control layer formed on a top surface of said patterned free layer; a longitudinal bias layer formed on said patterned interface control layer, said patterned interface control layer controlling a bias magnetic field applied by said longitudinal bias layer to said free layer; an insulating layer formed on a portion of a top surface of said non-magnetic layer and on sides of said longitudinal bias layer, said interface control layer and said free layer; and an upper magnetic shield layer formed on said patterned longitudinal bias layer and said non-magnetic layer, a sense current flowing between said pinned layer and said fire layer through said non-magnetic layer.