Patent ID: 6987644
Filing Date: 2006-01-17
Classification: G11B

Abstract:
1. A thin film magnetic head comprising a protuberance layer having a predetermined length in a height direction from a surface facing a recording medium and a back gap layer located at a predetermined distance in the height direction from a rear end surface in the height direction of the protuberance layer, each provided on a lower core layer extending in the height direction from a facing-surface side, a magnetic layer connecting between the protuberance layer and the back gap layer, and a coil layer wound in a toroidal shape around the magnetic layer, wherein a plurality of first coil pieces extending in a direction intersecting the magnetic layer are provided at predetermined spacings in the height direction in a space enclosed with the lower core layer, the protuberance layer, and the back gap layer, connection layers are provided while protruding from end portions in a track-width direction of each first coil piece, and the first coil pieces are covered with a coil insulating layer, wherein all of a top surface of the coil insulating layer, a top surface of the protuberance layer, a top surface of the back gap layer, and top surfaces of the connection layers are provided as the same flattened surface, wherein the magnetic layer is provided on the flattened surface of the coil insulating layer, the protuberance layer, and the back gap layer, wherein a plurality of second coil pieces crossing over the magnetic layer are provided on the magnetic layer with an insulating layer therebetween, and wherein end portions in the track-width direction of each second coil piece are electrically connected to the top surfaces of the connection layers exposed at the flattened surface, and end portions of the first coil pieces adjacent to each other are connected via the second coil pieces, so that the coil layer wound in the toroidal shape is provided.