Patent ID: 6344954
Filing Date: 2002-02-05
Classification: B82Y,G11B

Abstract:
A magneto-resistive tunnel junction head having a tunnel multilayered film composed of a tunnel barrier layer, and a ferromagnetic free layer and a ferromagnetic pinned layer formed to sandwich the tunnel barrier layer therebetween,wherein said ferromagnetic free layer comprises, in an integral fashion, a free layer main portion substantially constituting a part of said tunnel multilayered film, a front flux guide portion extending on a front side of said free layer main portion, and a back flux guide portion extending on a back side of said free layer main portion, wherein said front flux guide portion constitutes a part of an ABS (Air Bearing Surface), and wherein a width-direction length Lm of said free layer main portion is set greater than a width-direction length Lf of said front flux guide portion and a width-direction length Lb of said back flux guide portion.