Patent ID: 8149538

Claim:
A magnetic head for perpendicular recording comprising: a slider comprising a facing surface opposed to the recording medium; and a head section on the slider, configured to perform information processing for the recording medium, wherein the head section comprises a main pole configured to apply a recording magnetic field perpendicular to the recording medium, a recording coil configured to excite the main pole, a write and shield pole opposed to a trailing side of the main pole across a write gap, and side shields on opposite sides of the main pole transversely relative to a track to face side faces of the main pole and magnetically separated from the main pole, wherein a part of a side face of each side shield opposed to each corresponding side face of the main pole which is located at the shortest distance from a leading end of each side face of the main pole, on the facing surface, comprises a permeability lower than that of another part of the side shield.