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    • 6. 发明授权
    • Magnetic tape medium
    • 磁带介质
    • US07341798B2
    • 2008-03-11
    • US11132791
    • 2005-05-19
    • Noriyuki Hirai
    • Noriyuki Hirai
    • G11B5/716
    • G11B5/584
    • A magnetic recording medium is provided that can ensure stable recording and reproducing characteristics with little off-track even when a track density in the direction of width of the tape is very high and 50 lines/mm or more, an off-track margin is 5 μm or smaller, and a variation that is permitted at maximum as a dimensional variation in the direction of width of the tape itself due to environmental factors such as the change of temperature and humidity, the change of tension, a creep, etc. is small as low as 0.10% or less. Assuming that Young's modulus in the direction of width of a non-magnetic substrate is X and Young's modulus in the direction of width of the back layer is Y, X is 850 kg/mm2 or more, or when X is less than 850 kg/mm2, X×Y is 6×105 or more, and assuming that Young's modulus in the direction of width of a layer including a magnetic layer is Z, Y/Z is not larger than 6.0.
    • 提供一种磁记录介质,即使当磁带宽度方向上的磁道密度非常高和50行/ mm以上时,也可以保证具有很小偏离磁道的稳定的记录和再现特性,偏离磁道边距为5 由于环境因素如温度和湿度的变化,张力的变化,蠕变等,最大限度地允许作为带本身的宽度方向的尺寸变化的变化是小的 低至0.10%以下。 假设非磁性基板的宽度方向的杨氏模量为X,背面层的宽度方向的杨氏模量为Y,X为850kg / mm 2以上,或 当X小于850kg / mm 2时,XxY为6×10 5以上,假定包含磁性层的层的宽度方向的杨氏模量为 Z,Y / Z不大于6.0。