Patent ID: 7808743

Claim:
A perpendicular magnetic write head, comprising: a main magnetic pole layer leading a magnetic flux to a write medium, the main magnetic pole layer having an internal stress of a specified direction; an auxiliary magnetic pole layer disposed on a trailing side of the main magnetic pole layer, the auxiliary magnetic pole layer being recessed from the main magnetic pole layer; a nonmagnetic layer disposed in a layer same as the auxiliary magnetic pole layer and in front of the auxiliary magnetic pole layer, the nonmagnetic layer having an internal stress of a direction same as that of the main magnetic pole layer; and a write shield layer disposed in a layer same as the auxiliary magnetic pole layer and in front of the auxiliary magnetic pole layer, the write shield layer being separated from the main magnetic pole layer with a gap layer in between, wherein the nonmagnetic layer is arranged to fill up a space between the auxiliary magnetic pole layer and the write shield layer.