Patent ID: 7804662

Claim:
A method of fabricating a perpendicular recording head comprising: forming a main pole layer; depositing a first mask layer on the main pole layer; etching the main pole layer to form a main pole; depositing an alumina layer over the first mask layer and the main pole; removing a portion of the alumina layer such that a surface of the alumina layer intersects an edge of the first mask layer; depositing a second mask layer having a pair of openings on opposite sides of the first mask layer; etching the alumina layer through the pair of openings in the second mask layer so as to form a cavity on each side of the main pole and an upward extending ridge of the alumina layer on each side of the first mask layer; removing the first and second mask layers; depositing a write gap layer on the main pole; and depositing a magnetic layer, the magnetic layer filling the cavities and covering the write gap layer.