| 摘要 |
PURPOSE:To facilitate the control of a bias magnetic field and to stabilize the characteristics for a magneto-resistance effect type magnetic head, by setting a permanent magnet film and a conductor layer holding a thin film magneto- resistance effect element between them on a substrate. CONSTITUTION:An insulated layer 29 or SiO2, etc. is coated when necessary on a substrate 21, and at the same time an insulated permanent magnet film 22 of about 2,000-3,000Angstrom thickness is formed on the substrate 21 to generate a bias magnetic field. A thin film magneto-resistance effect element 23 is formed on the film 22 via an Fe-Ni alloy, etc. of about 300-500Angstrom . In addition, a conductor layer 24 for generation of bias magnetic field is formed on the element 23 with about 500-1,500Angstrom thickness via a Ta-Si group alloy, etc. A terminal conductor layer 30 is coated and led out from the upper parts of both ends of the layer 24. With use of such magnetic head, a magnetic field obtained by synthesizing a magnetic field generated from the layer 24 and a magnetic field produced from the film 22 flows to the element 23 to avoid the oxidation of the element 23. |
