| 摘要 |
PURPOSE:To ensure the uniform magnetic properties over a wide area, by vapor depositing a ferromagnetic layer on a high polymer molded product substrate while moving this substrate along a rotary supporter and then taking up the substrate when the temperature of the substrate is set at a level lower than the glass transition point after cooling the supporter. CONSTITUTION:A high polymer substrate 1 of a polyethylene telephthalate film within a vacuum vapor depositing device is rewound by a shaft 3 and then moved along a rotary supporter 2 having 2m diameter and flowing a refrigerant of 5 deg.C. Then Co and Ni is vapor deposited obliquely on the substrate 1 from an evaporating source 5 via a mask 6. Thus a ferromagnetic layer is formed on the substrate 1. In this case, the supporter 2 is cooled down at 5 deg.C which is lower than the glass transition point 69 deg.C of the film substrate 1. Therefore the substrate 1 is cooled continuously down to a level lower than 69 deg.C until it is separated from a roller 7 at a point D3. As a result, a creep or a distortion due to a local deformation is not produced. Thus the output stability is improved without generation of noises for a magnetic recording medium. |
