A slider is formed of an air bearing surface coated with a wear limiting coating
that substantially limits surface wear of the air bearing surface encountered in
proximity recording. The wear limiting coating is comprised of a wear inhibiting
layer formed on the air bearing surface and a sacrificial layer formed on the wear
inhibiting layer. The two coatings of the wear limiting coating have different
mechanical properties so that the sacrificial layer is burnished, exposing the
wear inhibiting layer. This design substantially limits the surface wear of the
air bearing surface typically encountered in proximity recording, resulting in
less debris accumulation, which could otherwise adversely affect the performance
of the proximity recording head. This self-limiting burnishing action overcomes
the flying height variation due to manufacturing tolerances and provides extremely
small and uniform magnetic spacing, which greatly enhances the proximity recording.
Moreover, the burnishing action also achieves an improved flying stability and
a reduction in the altitude sensitivity.