Patent ID: 6836957
Filing Date: 2005-01-04
Classification: B82Y,G11B,Y10T

Abstract:
1. A method for making a perpendicular magnetic recording head comprising the steps of: (a) forming an auxiliary magnetic pole layer on a first nonmagnetic insulating layer with a magnetic material; (b) forming a coupling layer on the auxiliary magnetic pole layer with a magnetic material behind an opposing face, opposing a recording medium, of the perpendicular magnetic recording head; (c) covering the first nonmagnetic insulating layer, the auxiliary magnetic pole layer, and the coupling layer with a second nonmagnetic insulating layer, and then forming a coil layer on the second nonmagnetic insulating layer in a region that does not include the coupling layer; (d) covering the second nonmagnetic insulating layer and the coil layer with an inorganic insulating layer, removing the second nonmagnetic insulating layer and the inorganic insulating layer on the coupling layer to expose the coupling layer and forming a plating base layer on the second nonmagnetic insulating layer over the inorganic insulating layer and the coupling layer; (e) forming a resist layer on the plating base layer, and forming a groove in the resist layer, the groove having a trimming pattern in a region in which a main magnetic pole layer is to be later such that an inner width of the groove in a track width direction gradually increases, from a bottom to a top of the resist layer, (f) forming the main magnetic pole layer in the groove by plating; (g) planarizing a top face of the main magnetic pole layer by milling in which milling particles enter at a tilt angle from a normal to the main magnetic pole layer; (h) removing the resist layer: and (i) forming a yoke layer on the inorganic insulating layer, the yoke layer magnetically coupling the main magnetic pole layer with the coupling layer.