Patent ID: 6614620
Filing Date: 2003-09-02
Classification: G11B,Y10S

Abstract:
A thin film magnetic head comprising:a lower magnetic pole extending rearward from a front end exposed at a medium-opposed surface and defining a flat upper surface; a non-magnetic auxiliary layer designed to swell from the flat upper surface of the lower magnetic pole at a position retracted from the medium-opposed surface; a non-magnetic gap layer extending over the flat upper surface of the lower magnetic pole by a constant thickness in a range between the medium-opposed surface and the non-magnetic auxiliary layer; and an upper magnetic pole extending over the non-magnetic gap layer and the non-magnetic auxiliary layer, said upper magnetic pole including a tip portion extending by a constant width rearward from the medium-opposed surface and a rear portion connected to a rear end of the tip portion, said rear portion having a width larger than the constant width, wherein a neck height of the upper magnetic pole is set smaller than a gap depth, the gap depth corresponding to a distance between the medium opposed surface and the non-magnetic auxiliary layer, the neck height corresponding to a distance between the medium-opposed surface and the rear end of the tip portion.