Patent ID: 7209322
Filing Date: 2007-04-24
Classification: B82Y,G11B

Abstract:
1. A thin film magnetic head comprising: a lower core layer extending from a surface facing a recording medium in a height direction; a magnetic layer connected directly or indirectly to the lower core layer at a predetermined distance from the surface facing the recording medium; and a coil layer toroidally wound around the magnetic layer; wherein a plurality of first coil pieces extending in a direction crossing the magnetic layer is disposed on the lower core layer with predetermined intervals in the height direction, the first coil pieces being covered with a coil insulating layer on which the magnetic layer is formed; a plurality of second coil pieces crossing the magnetic layer is disposed on the magnetic layer with an insulating layer provided therebetween so that ends of each second coil piece face the ends of each first coil piece in a thickness direction; the insulating layer comprises a first insulating sub-layer of an inorganic insulating material formed on a top of the magnetic layer, and second insulating sub-layers of an organic insulating material formed on both sides of the first insulating sub-layer in a track width direction within a region extending in the height direction and including a formation region of the second coil pieces; and the second insulating sub-layers are formed on both sides of the first insulating sub-layer to have a space larger than at least a track width in the track width direction, and extend beyond both end surfaces of the magnetic layer in the track width direction so as to be interposed between the second coil pieces and both end surfaces of the magnetic layer, wherein the second insulating sub-layers have joint surfaces with the second coil pieces between the second coil pieces and both end surfaces of the magnetic layer, the joint surfaces being inclined toward the first coil piece side away from at least both end surfaces of the magnetic layer.