| 摘要 |
PURPOSE:To obtain satisfactory coercive force with the machined surface itself of a base plate forming a magnetic layer by forming the 1st magnetic layer in the form of a thin amorphous alloy film on the base plate then forming successively an insulating layer to serve as a magnetic gap, a conductor layer to serve as a coil and the 2nd magnetic layer thereon. CONSTITUTION:A ferrite block is cut to a desired thickness by an inside or outside circumferential slicer, by which a base plate 2 having <=0.6S surface roughness is obtd. The resulted plate 2 is washed and dried then a Co-base amorphous alloy such as a Co-Nb alloy or the like is deposited by a sputtering method, etc. to form the 1st thin magnetic film 9. A magnetic gap 5 is then formed by Al2O3, etc. and a conductor 6 to serve as a coil, an insulator 7 and the 2nd magnetic layer 8 are successively formed to manufacture a thin film magnetic head. Al2O3 or polyimide or the like is used for the insulator 7 and the 2nd magnetic layer is the same as the 1st magnetic layer 9 or an Fe-Si-Al alloy, etc. may be used for the same. The need for finishing the surface of the plate 1 to a specular surface is thus eliminated and the thin film magnetic head having <=0.5 Oe coercive force is obtd. at a low cost. |
