JPS576436A - Magnetic recording medium - Google Patents

Abstract

PURPOSE:To obtain a magnetic recording medium which has a high coercive force stable range indispensable for high-density recording, and does not gather rust, by providing a magnetic layer consisting of Co, a magnetic material except Co, and an inorganic substance, on the surface of a basic material. CONSTITUTION:A basic material 9 such as a macromolecular molding substance, a nonmagnetic metal, etc. is fed from a basic material roll-out shaft 2 provided in a vacuum tank 1, and it is carried along the circumferential side of a cooling fan 5 through an intermediate roller 4. And, a vapor deposition material 6 consisting of Co, a magnetic material except Co (example; Fe), and inorganic materials of one kind or more (example; Mg, P, S), which has been put in a vapor deposition material housing vessel 7 is heated and evaporated by an electronic beam from an electronic beam generation source 9, its vapor flow 6' is made to stick onto the surface of the basic material 9, a magnetic layer is formed, and after that, it is wound round a basic material take-up shaft 3 through the intermediate roller 4. In this way, it can be attained to make a magnetic tape long per unit radius by a thin film magnetic layer.