Patent ID: 8400732

Claim:
A perpendicular magnetic write head comprising: a magnetic pole generating a magnetic field for writing; a nonmagnetic layer surrounding all sides of the magnetic pole, except one side, a thickness of the nonmagnetic layer being constant in any position of the nonmagnetic layer; a gap layer disposed on the one side of the magnetic pole; a couple of side shields disposed on the gap layer and sides of the nonmagnetic layer in a write track width direction; a leading shield disposed on the side shields and the nonmagnetic layer such that the side shields and the nonmagnetic layer are sandwiched between the gap layer and the leading shield; and a trailing shield disposed on the gap layer such that the gap layer, the side shields, and the nonmagnetic layer are sandwiched between the trailing shield and the leading shield, the side shields and the trailing shield being completely separated by the gap layer, such that the side shields and the trailing shield are not connected with each other.