Patent ID: 6317289
Filing Date: 2001-11-13
Classification: B82Y,G11B,Y10T

Abstract:
A thin film magnetic head comprising:a first magnetic layer having a pole portion;a second magnetic layer having a pole portion whose end surface constitutes an air bearing surface together with said pole portion of the first magnetic layer, said pole portion of the second magnetic layer extending from the air bearing surface to a position near a reference position of throat height zero and having a width defining a width of a record track on a magnetic record medium to be opposed to the air bearing surface;a third magnetic layer which is brought into contact with said second magnetic layer on a side opposite to said first magnetic layer and is magnetically coupled with said first magnetic layer at a rear position remote from the air bearing surface;a write gap layer interposed between said pole portion of the first magnetic layer and said pole portion of the second magnetic layer at least at the air bearing surface;a thin film coil having a portion which is supported by an insulating material in an electrically isolated manner between said first magnetic layer and said third magnetic layer; anda substrate supporting said first, second and third magnetic layers, write gap layer and thin film coil;wherein the pole portion of said second magnetic layer extends from the air bearing surface to a position near the throat height zero position and a connecting portion extends from said pole portion of said second magnetic layer inwardly and in a direction toward the center of the head and opposite to said air bearing surface, and said third magnetic layer is brought into contact with at least a surface and side walls of said connecting portion of the second magnetic layer.