Patent ID: 7882617
Filing Date: 2011-02-08
Classification: G11B,Y10T

Abstract:
1. A method for manufacturing a magnetic head, comprising: forming a read head on a substrate; forming a lower magnetic pole piece on said read head; forming a main magnetic pole piece on said lower magnetic pole piece; and forming a protective film on a surface of said main magnetic pole piece for protecting said main magnetic pole piece, wherein said protective film is formed while applying a bias to said substrate, wherein an air bearing surface of said main magnetic pole piece facing a magnetic disk has a tapered shape in which a length of said air bearing surface in a track width direction decreases with decreasing distance from said substrate, and is narrower than an overall width of the lower magnetic pole piece, wherein said protective film fully covers the tapered shape of the main magnetic pole piece, wherein a thickness of said protective film is constant along a perpendicular between the surface of said main magnetic pole piece and an outer surface of the said protective film such that said protective film conforms to the surface of said main magnetic pole piece.