Patent ID: 6618223
Filing Date: 2003-09-09
Classification: G11B,Y10T

Abstract:
An inductive write structure for use in a magnetic data recording system, comprising:a first pole constructed of a magnetic material and having a first end and a second end; a second pole having a first end and a second end, said second end of said second pole being connected with said second end of said first pole to define a back-gap region and said first end of said second pole being separated from said first end of said first pole by a write gap, said first end of said first pole and said first end of said second pole and said write gap comprising a pole tip region; an electrically conductive coil having a plurality of winds a portion of which passes between said first and second poles; and a first electrically insulating material disposed between said coil and said first pole and a second electrically insulating material disposed between said coil and said second pole, said first and second insulating materials electrically isolating said coil from said first and second poles; wherein said second pole comprises a high magnetic moment layer and a secondary layer, said high magnetic moment layer and said secondary layer having substantially the same width at said first end, said high magnetic moment layer comprising a laminate adjacent said second insulating material and extending into said write gap, said second pole high magnetic moment layer laminate comprising at least one lamina of a high magnetic moment material including FeXN, X being selected from the group consisting of Rh, Ta, Al, Ti, and Zr, and at least one lamina of a non-magnetic dielectric material, and said secondary layer comprising a soft magnetic material differing from said second pole high magnetic moment layer laminate.