Patent ID: 6927942

Claim:
A magnetic disk device comprising: a magnetic disk; and a magnetic head slider provided with a plurality of air bearing surfaces for floating over the magnetic disk when the magnetic disk is rotated, and a loading point that receives a load onto the rotating magnetic disk, wherein the slider occasionally comes into contact with the magnetic disk, wherein a leading slope angle of one of the plurality of air bearing surfaces in front of the loading point in the traveling direction of the slider from an end closest to the magnetic disk with the surface of the magnetic disk is smaller than a trailing slope angle from the closest end with the surface of the magnetic disk, wherein at least two of said plurality of air bearing surfaces are not located on the same plane, wherein a difference-in-stage is formed on said one of the plurality of air bearing surfaces in the vicinity of a leading edge located in front of said loading point in the traveling direction of the slider, wherein said leading slope angle determined by the difference-in-stage with the surface of the magnetic disk is 20 to 150 μrad, and wherein at least a part of the width in lateral direction for the traveling direction of the head slider of the difference-in-stage on each bearing surface the 150 μm or more.