Patent ID: 8059366

Claim:
A laminated write pole structure having a trapezoidal shape along an air bearing surface (ABS) and comprised of a stack of layers formed on a substrate, comprising: (a) a plurality of â€œnâ€ high moment magnetic layers 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 magnetic layers and wherein the plurality of high moment magnetic layers guide magnetic flux to the ABS during the write operation; and (b) â€œnâˆ’1â€ 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.