Patent ID: 7485378
Filing Date: 2009-02-03
Classification: B32B,G11B,Y10T

Abstract:
1. A thin film magnetic head comprising: a lower magnetic core; a lower magnetic pole piece disposed at a top end of the lower magnetic core; an upper magnetic core; an upper magnetic pole piece disposed at a top end of the upper magnetic core; a magnetic gap disposed between the lower magnetic pole piece and the upper magnetic pole piece; and conductor coils covered with an insulator and disposed between the lower magnetic core and the upper magnetic core; wherein a magnetic film of one of the upper magnetic core and the upper magnetic pole piece includes: wherein in a case where the upper magnetic pole piece is the magnetic film, each first thin magnetic plating film is a 66 wt % Fe-33 wt % Co-1 wt % Ni film and each second thin magnetic plating film is a 56 wt % Co-19 wt % Ni-25 wt % Fe film.