Patent ID: 7130154

Claim:
A magnetic head slider comprising a magnetic head core provided in a plate-shaped slider body so that the slider flies and moves above a magnetic disk to write or read magnetic information on a medium; wherein a plurality of rails is formed for producing buoyant force on either side edge portion of the medium-facing surface of the slider body on the magnetic disk side so as to extend from the air flow inlet side to the air flow outlet side, at least two side rails on either side edge portion are provided in the direction from the air flow inlet side to the air flow outlet side of the slider body, wherein first two side rails of the at least two side rails are provided on the air flow inlet side, each of the first two side rails having a first pad formed on a portion of surface thereof, wherein second two side rails of the at least two side rails are provided on the air flow outlet side, each of the second two side rails having a second pad formed on a portion of surface thereof, wherein a first protrusion is provided on the medium-facing surface of the first side rail not provided with the pad, and wherein the first protrusion has a film hardness of 22 GPa or more.