Patent ID: 7221530
Filing Date: 2007-05-22
Classification: G11B

Abstract:
1. A magnetic disk apparatus for a perpendicular magnetic recording system comprising: a magnetic disk having a reproducing head and a recording head, a perpendicular magnetic disk having a perpendicular magnetic recording layer, a substrate and a soft magnetic film formed between the perpendicular magnetic recording layer and substrate, wherein the recording head has a recording magnetic pole, the recording head has an air bearing surface, a leading face formed on an upstream side with respect to a rotating direction of the magnetic disk, a trailing face formed on a downstream side with respect to the rotating direction of the magnetic disk, a first side-face, asecond side-face opposite to the first side-face and a third face intersecting between the leading face and the first side-face, and a length measured along a radial direction from the third face to a crossing point between the trailing face and the second face is not more than a track pitch of said perpendicular magnetic disk.