Patent ID: 7392577
Filing Date: 2008-07-01
Classification: G11B,Y10T

Abstract:
1. A method for manufacturing a perpendicular magnetic recording head which includes: a first magnetic portion including a primary magnetic pole with a track width, the primary magnetic pole being disposed at a surface opposing a recording medium; a second magnetic portion with a width larger than the track width, separated from the first magnetic portion by a gap in a region and directly or indirectly coupled with the first magnetic portion in a region away in a height direction from the surface opposing the recording medium; a coil layer disposed in the gap, wound around the first magnetic portion, and in which the first magnetic portion generates a magnetic field to record magnetic data onto the recording medium, the method comprising: (a) forming the first magnetic portion of a magnetic material; (b) flattening at least a top surface of the primary magnetic pole; (c) providing a nonmagnetic material layer at least over the primary magnetic pole from the top surface to sides of the primary magnetic pole; wherein step (c) comprises: (d) forming a shield layer at least over the primary magnetic pole and at the sides of the primary magnetic pole in a single piece with the nonmagnetic material layer therebetween, wherein the nonmagnetic material layer is formed so that a thickness thereof in the width direction on the side surfaces of the primary magnetic pole is larger than a thickness thereof on the top surface of the primary magnetic pole.