Patent ID: 6694604
Filing Date: 2004-02-24
Classification: G11B,Y10T

Abstract:
A method of making a magnetic write head that has an air bearing surface (ABS), a pole tip site adjacent the ABS where pole tip layers are located, a field adjacent the pole tip site and a back gap comprising:forming a bottom first pole piece layer in the pole tip site and in the field; forming a top first pole tip layer on the bottom first pole piece layer in the pole tip site and in the field; forming a write gap layer on the top first pole tip layer in the pole tip site and in the field; forming a zero throat height (ZTH) defining layer on the write gap layer in the field and in only a back portion of the pole tip site so as to leave a front portion of the write gap layer adjacent the ABS exposed and with the ZTH defining insulation having a front wall recessed from the ABS that is located adjacent a zero throat height (ZTH) site of the magnetic head; forming a bottom second pole tip layer on the ZTH defining layer and on the exposed portion of the write gap layer; forming a mask on the bottom second pole tip layer in the pole tip site for defining the top first pole tip layer and the bottom second pole tip layer that are located in said pole site at said ZTH site and that extend forward toward the ABS and rearward toward the back gap from the ZTH site; ion milling the layers until the bottom second pole tip layer, the ZTH defining layer, the write gap layer and the top first pole tip layer are milled away except under the mask; removing the mask leaving the top first pole tip layer on the bottom first pole piece layer, the write gap layer on the top first pole tip layer that is adjacent the ABS, the ZTH defining layer on the write gap layer with an edge recessed from the ABS that defines the ZTH and the bottom second pole tip layer on the ZTH defining layer and the write gap layer; and forming a top second pole piece layer on the bottom second pole tip layer and connecting the top second pole piece layer to the bottom first pole piece layer at a back gap.