Patent ID: 7818875
Filing Date: 2010-10-26
Classification: G11B,Y10T

Abstract:
1. A method of manufacturing a magnetic write head on a wafer, comprising: providing a wafer; depositing a first magnetic material on the wafer; depositing a non-magnetic gap layer on the first magnetic material; depositing a layer of photosensitive film over the non-magnetic gap layer; and photolithgraphically patterning the photosensitive film to form a desired pattern in the photosensitive film, the pattern including a trench formed in the photosensitive film, the photolithographic patterning of the photosensitive film being performed by a tool that includes a light source, a photo mask and a lens, and wherein; depositing a second magnetic material into the trench formed in the photosensitive film; removing the photosensitive film; and performing an ion mill on the first magnetic material, non-magnetic gap layer and the second magnetic, the ion mill impinging directly on an upper surface of the second magnetic material, the second magnetic material serving as a mask such that the ion mill removes a portion of the first magnetic material that is not beneath the second magnetic material, the ion mill being terminated before all of the first magnetic material has been removed, thereby forming a notch in the first magnetic material.