Patent ID: 6432316
Filing Date: 2002-08-13
Classification: G11B,Y10T

Abstract:
A method of manufacturing a thin film magnetic head by sequentially forming at least a lower core layer, a non-magnetic layer and an upper core layer having an upper layer pole defining the track width and subsequently forming a magnetic gap between said lower core layer and said upper layer pole, said method comprising:an upper layer pole forming step of forming a lower core layer and a non-magnetic layer on a substrate and forming an upper layer pole thereon with a profile wider than the designed track width; a first etching step of forming a first mask covering one of the lateral sides of said upper layer pole along the track and etching the other lateral side exposed from the mask; and a second etching step of forming a second mask covering the lateral side etched in said first etching step and etching the lateral side opposite to it; said upper layer pole being made to have the intended track width.