| 摘要 |
PURPOSE:To eliminate the asymmetry of a reproduced waveform, by arranging conductors to two gaps formed by two shield layers and a magnetoresistance effect element and making a bias current to flow in the opposite direction. CONSTITUTION:An insulating layer (SiO2) 8A, conductor (Al, Au, etc.) 3a, insulating layer 8B, magnetoresistance effect (MR) element (Fe-Ni alloy) 2, conductor 3B, and shield layer 4 are successively formed on a shield plate 1 made of a high-magnetic-permeability material by sputtering, evaporation, etc. When the distances, namely the length of the gaps between the MR element 2 and the shield layer 1 and between the MR element 2 and the shield layer 4 are made equal and a bias magnetic field is impressed upon the MR element 2 by making an electric current to flow to the conductors 3a and 3b in the opposite direction, the asymmetry of a reproduced waveform can be eliminated. |
