Patent ID: 8305709

Claim:
A perpendicular magnetic head for writing information on a magnetic recording medium, comprising: an air bearing surface (ABS) facing toward the magnetic recording medium; a coil for generating a magnetic flux corresponding to the information to be written on the magnetic recording medium, the coil being buried in an insulating material; a magnetic pole layer having a magnetic pole surface disposed at the ABS, the magnetic pole layer permitting the magnetic flux generated by the coil to pass therethrough, and generating a magnetic field for writing the information on the magnetic recording medium; a magnetic shield layer having a magnetic shield surface disposed at the ABS, the magnetic shield layer connected to the magnetic pole layer at a position displaced from the ABS, the magnetic shield layer collecting the magnetic flux generated by the magnetic pole layer and returning the magnetic flux to the magnetic pole layer through a backgap; a gap layer made of a non-magnetic material and disposed between the magnetic pole layer and the magnetic shield layer; and a non-magnetic region formed of a non-magnetic material and disposed in the magnetic shield layer, the non-magnetic region being positioned behind the ABS with a certain distance rearwardly from the ABS, being disposed on a connecting line which connects the magnetic pole surface with the backgap so as to penetrate the magnetic shield layer to reach the insulating material burying the coil in a direction along which the magnetic recording medium travels, and having a determined width and depth, the determined width being less than a width of the magnetic shield layer to define respective magnetic flux side pathways.