Patent ID: 7810226
Filing Date: 2010-10-12
Classification: G11B,Y10T

Abstract:
1. A manufacturing method of a thin-film magnetic head comprising steps of: forming a main magnetic pole film on a first nonmagnetic layer formed on or above an element formation surface of a substrate; forming a photoresist pattern film used as a mask on said main magnetic pole film; forming a first pattern having a width W forming a non-magnetic mask film made of a nonmagnetic material having a smaller etching rate than said main magnetic pole film so as to cover said first pattern; forming a second pattern having a width W thereafter or at the same time of said forming said second pattern, forming: side surfaces, having a bevel angle, of said main magnetic pole layer; and a lowest surface of the main magnetic pole layer having a width W forming a second non-magnetic film so as to cover said second pattern that has been undercut; and forming a main magnetic pole layer surrounded by said second non-magnetic film by polishing said second non-magnetic film and an upper portion of said main magnetic pole film.