Patent ID: 7124498

Claim:
A method of manufacturing a magnetic head having a lower core layer made of a magnetic material, an upper core layer which is made of a magnetic material and opposes the lower core layer with a gap layer interposed therebetween which is made of non-magnetic material and a coil layer which induces a recording magnetic field to the lower core layer and the upper core layer, comprising: (a) forming the gap layer on the lower core layer and forming the upper core layer on the gap layer; (b) cutting the upper core layer and the gap layer so as to have a track width; (c) forming a non-magnetic material layer at the side, a top surface of the upper core layer, and a side of the gap layer, the non-magnetic material layer at the side of the upper core layer and the gap layer having a taper region of which a film thickness in the track width direction is gradually reduced toward the lower core layer, and contacting a lower periphery of the taper region with a top surface of the lower core layer thereupon; (d) cutting the top surface of the lower core layer extending from the lower periphery of the taper region to both sides to form slopes inclined in a direction separated from the upper core layer and cutting the lower core layer in a lower direction to form a protrusion having the track width; and (e) removing a material layer composed of the same material as the lower core layer adhered to the outside of the non-magnetic material layer, when cutting the lower core layer in the step (d), wherein the steps (a) to (e) are carried out in that order.