Patent ID: 6628478
Filing Date: 2003-09-30
Classification: G11B

Abstract:
A magnetic write head having an air bearing surface (ABS), comprising:ferromagnetic first and second pole piece layers that have a yoke portion located between a pole tip portion and a back gap portion; a nonmagnetic write gap layer located between the pole tip portions of the first and second pole piece layers; an insulation stack with at least one coil layer embedded therein located between the yoke portions of the first and second pole piece layers; the first and second pole piece layers being connected at their back gap portions; at least one of the first and second pole piece layers being a lamination of alternate ferromagnetic and nonmagnetic metal films; each nonmagnetic metal film causing an antiferromagnetic coupling between ferromagnetic films adjacent thereto so that the adjacent ferromagnetic films are antiparallel exchange coupled for at least partial flux closure therebetween; and said adjacent ferromagnetic films having a thickness differential of at least 10 Ã¥.