Production of magnetic recording medium

Abstract

PURPOSE: To improve the vapor deposition efficiency and productivity of the titled medium by forming a magnetic recording layer while irradiating either an X ray or a charged particle ray in the incident direction opened to an angle of ≥45° from the incident direction of the vapor flow wherein the maximum vapor depositing velocity is obtained by oblique vapor deposition. CONSTITUTION: A magnetic recording layer is formed while irradiating either an X ray or a charged particle ray in the direction opened to an angle of ≥45° from the incident direction of the vapor flow wherein the maximum vapor depositing velocity is obtained by oblique vapor deposition. The maximum vapor depositing velocity is obtained at the minimum incident angle of vapor on a polymeric film 8 as the substrate. At this time, an Ar ion beam is scanned in the width wise direction of the substrate, the angle θ is adjusted to ≥45° and the beam is regulated and irradiated on the part wherein the maximum vapor depositing velocity is obtained. The charged particle ray is irradiated so that the opening angle from the incident direction of the vapor flow wherein the maximum vapor depositing velocity is obtained in controlled to ≥45° and high coercive force Hc can be obtained even when the minimum incident angle is decreased. Consequently, the productivity is improved, the quality of the obtained magnetic recording layer is ameliorated and especially the still endurance is improved. COPYRIGHT: (C)1986,JPO&Japio

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Patent Citations (1)

    Publication numberPublication dateAssigneeTitle
    JP-S58161138-ASeptember 24, 1983Matsushita Electric Ind Co LtdManufacture of magnetic recording medium

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Cited By (2)

    Publication numberPublication dateAssigneeTitle
    JP-H02141926-AMay 31, 1990Matsushita Electric Ind Co LtdProduction of magnetic recording medium
    JP-H02141927-AMay 31, 1990Matsushita Electric Ind Co LtdProduction of magnetic recording medium