Patent ID: 6172848
Filing Date: 2001-01-09
Classification: G11B,Y10T

Abstract:
A magnetic write head that has a front air bearing surface (ABS) and a back gap comprising:first and second pole pieces;the first pole piece having a bottom first pole piece layer and a top first pole tip layer with the top first pole tip layer being on the bottom first pole piece layer and the second pole piece having a bottom second pole tip layer and a top second pole piece layer with the top second pole piece layer being on the bottom second pole tip layer;the bottom first pole piece layer and the top second pole piece layer being connected at the back gap and extending toward the ABS;an insulation stack with at least one coil layer embedded therein;the insulation stack being located between the bottom first pole piece layer and the top second pole piece layer in a position between the ABS and the back gap;the top first pole tip layer and the bottom second pole tip layer being located entirely between the ABS and the coil layer;a write gap layer;the write gap layer being located between the top first pole tip layer and the bottom second pole tip layer and separating the top first pole tip layer and the bottom second pole tip layer from one another at the ABS;a zero throat height (ZTH) defining layer on said write gap layer between the top first pole tip layer and the bottom second pole tip layer and recessed from the ABS toward the back gap so as to further separate the top first pole tip layer and the bottom second pole tip layer from one another at a location recessed from the ABS toward the back gap to define a zero throat height of the head where the first and second pole pieces first commence to separate from one another after the ABS.