Abstract: A thin film magnetic head comprises a non-magnetic oxide substrate 11 and a soft magnetic thin film 12 of an Fe-Si-Al alloy or the like laminated on the substrate 11. A reaction prevention film 40 of magnesia or an oxide material containing magnesia is formed in the interface between the substrate and soft magnetic thin film. The film 40 has a function of preventing the reaction between the substrate 11 and the thin film 12 to preclude magnetic property deterioration of the soft magnetic thin film and also reproduced output reduction and further preclude increase of the residual stress in the interface between the substrate and soft magnetic thin film, thus permitting excellent magnetic properties to be obtained.

Abstract: A continuous magnetic tape cassette for use in a magnetic tape recording and/or reproducing apparatus. The cassette comprises a casing for housing a magnetic tape, which has two ends connected together continuously forming one endless loop. A hub is rotatably mounted within the casing for rotationally engaging a driving shaft. A conveyor assembly is frictionally coupled to the hub, for imparting motion to the magnetic tape. The conveyor assembly comprises a plurality of guide rollers rotatably disposed about an outer circumference of the hub and an endless belt entrained about the plurality of guide rollers for frictionally coupling a rotation of the hub to the magnetic tape. A lever arm assembly is coaxially disposed about the hub and is connected to the endless belt which imparts the motion to the lever arm assembly. The lever arm assembly comprises a lever arm and a plurality of lever arm pinch rollers rotatably disposed on a distal end of the lever arm for guiding the magnetic tape about the hub.