Patent ID: 7088548

Claim:
A perpendicular magnetic recording system comprising: a perpendicular magnetic recording medium having a soft magnetic underlayer and a magnetic head having a magnetic recording head and a magnetic read head, wherein said magnetic read head comprises an upper shield, a lower shield and a read element provided between said upper shield and said lower shield, wherein said magnetic recording head comprises a main pole for recording a magnetization reversal on said perpendicular magnetic recording medium, the perpendicular magnetic recording system satisfying T b1 <( B s1 ×T m ×T ww )/2( B s2 ×( T m +T ww )), wherein T b1 is the thickness of said soft magnetic underlayer, B s2 is the saturation flux density of the same, T m is the thickness of said main pole along a track direction in the vicinity of its floating surface, T ww is the track width of the same, B s1 is the saturation flux density of the same, and T ww is less than 0.5 μm.