| 摘要 |
PURPOSE:To prevent mutual diffusion from being caused between a magnetic thin film and glass by forming a nitrided layer at least a part of the surface of a magnetic thin film of 'Sendust(R)' contacting glass for welding core half bodies. CONSTITUTION:The 'Sendust(R)' is formed on a ferrite pipe 7 and then a groove 8 which prescribes track width and a winding window 9 are worked and gas nitriding is carried out in this state. Then, SiO2 for specifying a gap is sputtered on the 'Sendust(R)' film 2 and the pieces are made to abut on each other and welded with glass. Then, the united body is cut to specific size to obtain core half bodies, thus forming a magnetic head. No mutual diffusion between the glass and 'Sendust(R)' film is caused even when the glass welding is performed after the nitrided layer 10 is formed. In this case,the 'Sendust(R)' film is easily peeled off the ferrite at temperature above 650 deg.C, so the treatment temperature should be lower than 650 deg.C at the time of the surface treatment.
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