Patent ID: 6538847
Filing Date: 2003-03-25
Classification: B82Y,G11B

Abstract:
A magnetic head comprising:a lower magnetic core, a non-magnetic gap layer formed on the lower magnetic core, an insulating layer formed on the non-magnetic gap layer, a coil formed on the insulating layer, a coil insulating layer covering the coil, and an upper magnetic core formed on the non-magnetic gap layer, the insulating layer and the coil insulating layer, the coil surrounding a magnetic path made of both the lower and upper magnetic cores, the upper magnetic core comprising an upper magnetic core front portion and an upper magnetic core rear portion, the upper magnetic core front portion beginning from a medium facing surface of the magnetic head and extending on the non-magnetic gap layer and on the insulating layer, the upper magnetic core rear portion having a front tip that is remote from the medium facing surface having a recess and is exposed at a bottom of the recess, contacting an upper surface of the upper magnetic core front portion and being formed beginning from the front tip and extending over the coil insulating layer, the upper magnetic core front portion having an apex on a boundary of the upper magnetic core front portion with the insulating layer closest to the medium facing surface on the non-magnetic gap layer and sandwiching the non-magnetic gap layer with the lower magnetic core on the medium facing surface side of the apex and the non-magnetic gap layer and the insulating layer with the lower magnetic core on the rear side of the apex, the upper magnetic core front portion having both side walls parallel to each other in the track width direction close to the medium facing surface and on the insulating layer a sector which width in the track width direction increases from the parallel width, the front tip and the upper magnetic core rear portion on the upper magnetic core front portion being located on the medium facing surface side of the apex of the upper magnetic core front portion.