| 摘要 |
PURPOSE:To impress efficiently a current magnetic field on a magnetic resistance element as a bias magnetic field through a soft magnetic substance thin film by bringing the side parts of the magnetic resistance element and the soft magnetic substance thin film opposite to the surface to be opposed to a medium in contact with or approximately in contact with each other. CONSTITUTION:A lower shield layer 2 consisting of 'Permalloy(R)' or an amorphous magnetic substance is laminated on a substrate 1 and a magnetic resistance element 4 consisting of an Ni-Fe film or an Ni-Co film both having a magneto-resistance effect is provided thereon through an insulating layer 3. Furthermore, a soft magnetic substance thin film 5 is furnished so as to be overlapped on the magnetic resistance element through the insulating layer 3 as a bias magnetic field impressing means. The side parts A of both magnetic resistance element 4 and soft magnetic substance thin film 5 opposite to the surface 7 to be opposed to a magnetic medium are brought into contact with each other and an upper shield layer 6 consisting of the same material as the lower shield layer 2 is further laminated on the soft magnetic substance thin film 5 through the insulating layer 3. Moreover, a conductor layer for passing an electric current through the magnetic resistance element is provided on both ends of the element. The soft magnetic substance thin film is made of 'Permalloy(R)' or an amorphous magnetic substance.
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