| 摘要 |
PURPOSE:To eliminate saturation of a core by making the shape of a thin film magnetic core larger than the width of a track. CONSTITUTION:A pair of grooves 12 having semicircular sectional form are formed on a magnetic substrate 11 to make the distance between them track width T, and non-magnetic material 13 is filled in the two grooves. A composite body of insulating material such as glass, SiO2 etc. and metals can be used as the non-magnetic material 13. After forming an insulating film of SiO2 etc., a wound conductor 14 and a layer insulating film 15 of SiO2 etc. a thin film magnetic head is constituted by forming an upper magnetic film 16 made of, for instance, sendust to stretch over non-magnetic material 13 in the two grooves 12. In this thin film magnetic head 17, the upper magnetic film 16 has core value larger than the track width T in the upper part of depth part. |
