Magnetic recording medium

Abstract

PURPOSE: To maintain initial good basic performances including S/N, reproduced waveform, drop-out, etc. for a long period of time by disposing a polymerized film contg. aspherical pulverous particles on a high-polymer film and providing a thin ferromagnetic metallic film as a magnetic recording layer thereon. CONSTITUTION: The glow discharge of styrene vapor is induced in a high-fre quency electric fleid while PE terephthalate is run and the polymerized film 2 of styrene is formed while the approximately hexagonal planar pulverous particle 3 are formed by evaporating Co therein. The film is subjected to diago nal vapor deposition of Co-Ni vapor flow 18 in the oxygen partial pressure while the film is run along a cooling can 16 in succession of the formation of the polymerized film to form magnetic recording layer 4. The film is there after taken up by a take-up shaft 8. The inside of a vacuum vessel 6 is restored to the atmospheric pressure upon completion of the longitudinal treatment. An alcohol soln. prepd. by dissolving a stearic acid is coated as a lubricating film by a coating machine and is dried to form a stearic acid film. The film is thereafter slit. COPYRIGHT: (C)1986,JPO&Japio

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Patent Citations (1)

    Publication numberPublication dateAssigneeTitle
    JP-S60251510-ADecember 12, 1985Fuji Photo Film Co LtdMagnetic recording medium

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Cited By (2)

    Publication numberPublication dateAssigneeTitle
    US-5023739-AJune 11, 1991Matsushita Electric Industrial Co., Ltd.Tape cassette with a trapping layer having a corrosiveness which is equal to or higher than that of the magnetic recording layer on the tape
    US-5235486-AAugust 10, 1993Matsushita Electric Industrial Co., Ltd.Tape cassette for adsorbing and trapping corrosive gases