Patent ID: 6762911
Filing Date: 2004-07-13
Classification: G11B,Y10T

Abstract:
A combination type thin film magnetic head comprising a substrate, an inductive type thin film magnetic head element and a magnetoresistive type thin film magnetic head element which are formed one on the other such that these magnetic head elements are supported by the substrate and air bearing surface is defined; wherein said inductive type thin film magnetic head element includes;a first pole made of a magnetic material which extends inwardly from said air bearing surface; a write gap film made of a non-magnetic material and formed on one surface of said first pole to extend inwardly from said air bearing surface over at least a distance of a pole chip; a bottom track pole made of a magnetic material and formed on a surface of said write gap film opposite to a surface which is brought into contact with said first pole to extend inwardly from said air bearing surface over at longest said distance of the pole chip; a first non-magnetic material film formed to extend inwardly over a given distance such that the first magnetic material film includes an outer end wall which defines a throat height zero reference position together with an inner end surface of the bottom track pole opposite to the air bearing surface and the first magnetic material film has a flat surface which is coplanar with a second surface of the bottom track pole opposite to a first surface which is brought into contact with said write gap film; an top track pole formed on said flat coplanar surface of the bottom track pole and first non-magnetic material film to extend inwardly from said air bearing surface to at least the inner end surface of the first non-magnetic material film such that said top track pole includes a track chip portion which exposes to the air bearing surface and a contact portion having a width larger than the track chip portion; a second non-magnetic material film formed such that aligned side walls of the bottom track pole, first non-magnetic material film and top track pole are surrounded by said second non-magnetic material film and the second non-magnetic material film has a flat coplanar surface together with a second surface of the top track pole opposite to a first surface which is brought into contact with the flat coplanar surface of the bottom track pole and first non-magnetic material film; a thin film coil formed in an electrically isolated manner inwardly with respect to an end surface of the second non-magnetic material film which is brought into contact with the aligned end surfaces of the first non-magnetic material film and the contact portion of the top track pole; and a second pole made of a magnetic material such that the second pole has one end which is magnetically coupled with the contact portion of the top pole and the other end which is magnetically coupled with the first pole at a back-gap remote from the air bearing surface, said second pole surrounding a part of the thin film coil together with first pole.