Patent ID: 6654203
Filing Date: 2003-11-25
Classification: G11B

Abstract:
A thin-film magnetic head comprising:a medium facing surface that faces toward a recording medium; a first magnetic layer and a second magnetic layer magnetically coupled to each other and including magnetic pole portions that are opposed to each other and placed in regions of the magnetic layers on a side of the medium facing surface, each of the magnetic layers including at least one layer; a gap layer provided between the magnetic pole portions of the first and second magnetic layers; and a thin-film coil at least a part of which is placed between the first and second magnetic layers and insulated from the first and second magnetic layers, wherein: at least one of the first and second magnetic layers includes a conductive base film and a layer including the magnetic pole portion; and the base film includes a first layer made of a magnetic material having a saturation magnetic flux density of 1.8 T or more, and a second layer provided between the first layer and the layer including the magnetic pole portion and made of a magnetic material different from the material of the first layer.