Patent ID: 7016149
Filing Date: 2006-03-21
Classification: G11B

Abstract:
1. A recording magnetic head comprising: a lower magnetic pole layer; an upper magnetic pole layer opposing said lower magnetic pole layer; and a lower sub magnetic pole provided on said lower magnetic pole layer, wherein said lower sub magnetic pole has a cross-section thereof becoming narrower towards said upper magnetic pole layer, said cross-section being perpendicular to a thickness direction of the lower magnetic pole layer, and an extension of said cross-section in a direction perpendicular to a surface of a magnetic record medium is shorter at a first position than at a second position, said first position being closer to said upper magnetic pole layer than said second position, and wherein a length of a tip of said lower sub magnetic pole in the direction perpendicular to the surface of a magnetic record medium is longer than a length of a tip of said upper magnetic pole layer in the direction perpendicular to the surface of a magnetic record medium, said tip of said lower sub magnetic pole and said tip of said upper magnetic pole layer facing each other across a gap therebetween.