Patent ID: 6154346
Filing Date: 2000-11-28
Classification: B82Y,G11B,Y10T

Abstract:
A composite type thin film magnetic head of normal structure, in which a magnetoresistive type thin film magnetic head for reading is formed on a substrate and an inductive type thin film magnetic head for writing is stacked on the magnetoresistive type thin film magnetic head, comprising:a substrate having a recessed portion formed in one surface thereof;a first magnetic layer formed to extend on said surface of the substrate from an end surface forming an air bearing surface to at least a vicinity of an edge of said recessed portion, said first magnetic layer forming one shield for the magnetoresistive type thin film magnetic head;a second magnetic layer formed to extend over a part of an inner surface of the recessed portion such that the second magnetic layer is magnetically separated from the first magnetic layer, said second magnetic layer forming a part of one pole of the inductive type thin film magnetic head;a thin film coil of the inductive type thin film magnetic head, at least a part of said thin film coil being formed within said recessed portion in an electrically isolated manner by an insulating film;a magnetoresistive element arranged within a shield gap layer in an electrically and magnetically separated manner, said shield gap layer extending along a surface of said first magnetic layer opposite to the substrate;a third magnetic layer formed to extend on a surface of said shield gap layer opposite to the substrate, said third magnetic layer forming another shield for the magnetoresistive type thin film magnetic head and being coupled with said second magnetic layer formed within said recessed portion to constitute a rest of said one pole of the inductive type thin film magnetic head;a write gap layer extending at least along a surface of the third magnetic layer opposite to the substrate; anda fourth magnetic layer formed to extend on a surface of said write gap layer opposite to the substrate to be opposed to said third magnetic layer and being coupled with said second magnetic layer at a rear position remote from the air bearing surface.