Patent ID: 7339765

Claim:
A slider for use in a magnetic disk unit, the slider comprising: a recording/reproducing element for recording and/or reproducing data on a disk medium; and an air bearing surface for facing a disk medium, said air bearing surface comprising an air-inflow end at one end and an air-outflow end at another end of the air bearing surface, comprising: a front step bearing surface; at least one front-rail surface which generates a positive pressure on the disk medium to float the slider; a negative-pressure cavity which generates a negative pressure to reduce the flying height of the slider; a rear-step bearing surface; at least one rear-rail surface which generates a positive pressure; and a recording/reproducing element surface on which the recording/reproducing element is provided, wherein a separating distance separates the recording/reproducing element surface from the rear-rail surface and the separating distance between the rear-rail surface and the recording/reproducing element is 5 to 10% of a distance from the air-inflow end to the air-outflow end.