| 摘要 |
PURPOSE:To improve both performances of resolving power and recording and reproducing efficiency by providing a magnetical structural region where the magnetic permeability decreases gradually toward the side face of a thin film head core having a rectangular section and is nearly zero on the side face to said core. CONSTITUTION:A td layer consisting of a Co-Zr amorphous film is formed on a smooth ceramic substrate and the magnetical structural region where the magnetic permeability thereof decreases gradually toward one side face of the core and is nearly zero on the side face is formed thereto. Such region is formed by a method consisting in specifying Zr at 33% so as to contain Bs at a zero ratio at the point near the substrate and decreasing successively the ratio of Zr. In general, the performance is higher as the head is thicker in terms of the recording and reproducing efficiency but both performances of the resolving power and recording and reproducing efficiency are improved by using the rectangular thin film head core as described above, providing the prescribed magnetism deterioration region thereto and providing the characteristic of the high edge sensitivity on one side. |
