Patent ID: 6538845
Filing Date: 2003-03-25
Classification: G11B

Abstract:
A thin-film magnetic head comprising:a gap layer, a magnetic pole layer optionally provided on one face of the gap layer; a lower core layer; an upper core layer, the lower core layer and the upper core layer facing each other and being separated by the gap layer; and a coil layer for applying a recording magnetic field to the lower core layer and the upper core layer; wherein at least one of the lower core layer and the upper core layer comprises a soft magnetic layer and at least one high-specific-resistance layer formed on at least one of the upper face and the lower face of the soft magnetic layer, and the high-specific-resistance layer has a specific resistance which is higher than the specific resistance of the soft magnetic layer; wherein the soft magnetic layer has a saturation magnetic flux density Bs which is higher than the saturation magnetic flux density Bs of the high-specific-resistance layer; and wherein the soft magnetic layer and the high-specific-resistance layer comprise magnetic materials containing the same components including Fe in at least one of the upper core layer and the lower core layer, and the Fe content in the soft magnetic layer is higher than the Fe content in the high-specific-resistance layer.