Patent ID: 6853518

Claim:
A magnetic head assembly, which has an air bearing surface (ABS), comprising: a spin valve sensor, nonmagnetic first and second read gap layers, ferromagnetic first and second shield layers; the spin valve sensor being located between the first and second read gap layers and the first and second read gap layers being located between the first and second shield layers; the spin valve sensor having a pinned layer which has a magnetic moment that is pinned by a pinning layer in a direction perpendicular to the ABS; ferromagnetic first and second pole piece layers and a nonmagnetic write gap layer wherein the second pole piece layer is separated from the first pole piece layer by the write gap layer at the ABS and is connected to the first pole piece layer at a back gap; each of the first and second shield layers and the first and second pole piece layers having a magnetic easy axis that is directed parallel to the ABS; an insulation stack with a coil layer embedded therein located between the first and second pole piece layers wherein the insulation stack includes at least one baked photoresist insulation layer that has been formed in part by heating at a preselected annealing temperature in the presence of a magnetic field that is directed perpendicular to said ABS; the insulation stack having been formed subsequent to said sensor and at least the first pole piece layer and/or second shield layer having not been subjected to annealing in the presence of a magnetic field directed parallel to said ABS before said heating of the layer of the insulation stack; and at least one of the first and second shield layers and the first and second pole piece layers comprising NiFeCo—O—N or NiFeCo—N.