Perpendicular magnetic recording head with a laminated pole

A laminated write pole structure comprised of a stack of layers formed on a substrate, comprising:

• (a) a plurality of “n” magnetic layers 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;
• (b) “n−2” non-magnetic spacers that are formed in alternating fashion with the “n−1” magnetic layers closest to the substrate such that there is a non-magnetic layer that separates neighboring magnetic layers except for the trailing magnetic layer and the nearest magnetic layer, said non-magnetic layers have a thickness that promotes an antiferromagnetic coupling or exchange decoupling between neighboring magnetic layers;
• and
• (c) a magnetic spacer formed between the trailing magnetic layer and the magnetic layer nearest to the trailing magnetic layer, said magnetic spacer promotes a direct magnetic coupling between the adjacent magnetic layers.

A method of forming a laminated write pole structure in a PMR write head, comprising:

• forming a stack of layers on a substrate, said stack of layers is comprised of:
• (a) a plurality of “n” magnetic layers 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
• (b) “n−1” non-magnetic spacers that are formed in alternating fashion with the magnetic layers 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.

A method of forming a laminated write pole structure in a PMR write head, comprising:

• forming a stack of layers on a substrate comprised of:
• (a) a plurality of “n” magnetic layers 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;
• (b) “n−2” non-magnetic spacers that are formed in alternating fashion with the “n−1” magnetic layers closest to the substrate such that there is a non-magnetic layer that separates neighboring magnetic layers except for the trailing magnetic layer and the nearest magnetic layer, said non-magnetic layers have a thickness that promotes an antiferromagnetic coupling or exchange decoupling between neighboring magnetic layers;
• and
• (c) a magnetic spacer formed between the trailing magnetic layer and the magnetic layer nearest to the trailing magnetic layer, said magnetic spacer promotes a direct magnetic coupling between said trailing magnetic layer and the nearest magnetic layer.