Patent ID: 8559132

Claim:
A laminated write pole structure formed on a substrate and along an air bearing surface (ABS) and consisting of: (a) a plurality of “n” high moment magnetic layers wherein n is at least 4 with a composition (M) each having a thickness in a direction perpendicular to the substrate wherein a magnetic layer farthest from the substrate is defined as the trailing magnetic layer during a write operation and has a thickness greater than the thickness of any of the other “n−1” magnetic layers, the “n−1” magnetic layers have a progressively smaller thickness wherein the thickness of a magnetic layer decreases as the distance of the magnetic layer from the trailing magnetic layer increases and wherein the plurality of high moment magnetic layers guide magnetic flux to the ABS during a write operation; and (b) “n−1” non-magnetic spacers (S) that are formed in alternating fashion with the magnetic layers to give a [M/S] n M configuration such that there is a non-magnetic spacer that separates neighboring magnetic layers and has a thickness that promotes an antiferromagnetic coupling or exchange decoupling between neighboring magnetic layers.