Patent ID: 6958886

Claim:
A perpendicular magnetic recording head comprising an auxiliary magnetic pole layer, an insulating layer formed on said auxiliary magnetic pole layer, and a main magnetic pole layer formed on said insulating layer, wherein: magnetic data is recorded on a recording medium by a perpendicular magnetic field concentrated on said main magnetic pole layer when a recording magnetic field is applied to said auxiliary magnetic pole layer and said main magnetic pole layer from a coil layer embedded in said insulating layer; said main magnetic pole layer is formed on a high-flatness surface and has a front end surface positioned in an opposing surface of the head opposite to said recording medium, said front end surface being formed in a shape with a width size gradually increasing in a direction of track width as said front end surface departs farther away from said auxiliary magnetic pole layer, said front end surface having an upper edge, of which width size in the direction of track width is defined at a track width Tw; and a yoke layer is formed in a larger film thickness than said main magnetic pole layer and has a cross-sectional area in a cross-section cut parallel to said opposing surface larger than an area of the front end surface of said main magnetic pole layer, said yoke layer having a front end surface positioned inward of said opposing surface and being magnetically coupled to said main magnetic pole layer.