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    • 1. 发明申请
    • Magnetic recording medium
    • 磁记录介质
    • US20050214583A1
    • 2005-09-29
    • US11082865
    • 2005-03-18
    • Kuniyasu ItoKazuhiro Hattori
    • Kuniyasu ItoKazuhiro Hattori
    • G11B5/65G11B5/60G11B5/64G11B5/66G11B5/725G11B5/82G11B5/855
    • G11B5/82G11B5/65G11B5/855
    • A magnetic recording medium having a recording layer formed in a concavo-convex pattern, which can allow a head to have stable flying characteristics. The recording layer is formed in a concavo-convex pattern, and concave portions of the concavo-convex pattern of the recording layer are filled with a non-magnetic material. The relationship of S≦3.6×R holds, when R represents a concavo-convex ratio obtained by dividing an area of convex portions in a surface by an area of the concave portions in the surface, and S represents a difference in height between a concavity and a convexity of the surface. In the magnetic recording medium, an arithmetical mean deviation of the assessed profile of the surface is limited to 0.3 nm or more.
    • 具有形成为凹凸图案的记录层的磁记录介质,其能够使头具有稳定的飞行特性。 记录层形成为凹凸图案,记录层的凹凸图案的凹部填充有非磁性材料。 当S <= 3.6×R的关系成立时,当R表示通过将表面中的凸部的面积除以表面中的凹部的面积而获得的凹凸比,并且S表示凹部之间的高度差 和表面的凸面。 在磁记录介质中,表面评估轮廓的算术平均偏差限制在0.3nm以上。
    • 2. 发明授权
    • Magnetic recording medium
    • 磁记录介质
    • US07615292B2
    • 2009-11-10
    • US11082865
    • 2005-03-18
    • Kuniyasu ItoKazuhiro Hattori
    • Kuniyasu ItoKazuhiro Hattori
    • G11B5/65G11B5/71B32B17/08
    • G11B5/82G11B5/65G11B5/855
    • A magnetic recording medium having a recording layer formed in a concavo-convex pattern, which can allow a head to have stable flying characteristics. The recording layer is formed in a concavo-convex pattern, and concave portions of the concavo-convex pattern of the recording layer are filled with a non-magnetic material. The relationship of S≦3.6×R holds, when R represents a concavo-convex ratio obtained by dividing an area of convex portions in a surface by an area of the concave portions in the surface, and S represents a difference in height between a concavity and a convexity of the surface. In the magnetic recording medium, an arithmetical mean deviation of the assessed profile of the surface is limited to 0.3 nm or more.
    • 具有形成为凹凸图案的记录层的磁记录介质,其能够使头具有稳定的飞行特性。 记录层形成为凹凸图案,记录层的凹凸图案的凹部填充有非磁性材料。 当S <= 3.6×R的关系成立时,当R表示通过将表面中的凸部的面积除以表面中的凹部的面积而获得的凹凸比,并且S表示凹部之间的高度差 和表面的凸面。 在磁记录介质中,表面评估轮廓的算术平均偏差限制在0.3nm以上。
    • 7. 发明授权
    • Method for manufacturing a magnetic recording medium
    • 磁记录介质的制造方法
    • US07247251B2
    • 2007-07-24
    • US11050769
    • 2005-02-07
    • Kazuhiro HattoriShuichi OkawaTakahiro SuwaMikiharu Hibi
    • Kazuhiro HattoriShuichi OkawaTakahiro SuwaMikiharu Hibi
    • H01F1/00
    • G11B5/855H01F41/32
    • A method for manufacturing a magnetic recording medium is provided, which can efficiently manufacture a magnetic recording medium that includes a recording layer formed in a concavo-convex pattern, has a sufficiently flat surface, and provides good recording and reproduction precision. The method includes: a non-magnetic material filling step of depositing a non-magnetic material over a recording layer formed in a predetermined concavo-convex pattern over a substrate, thereby filling a concave portion of the concavo-convex pattern with the non-magnetic material; and a flattening step of removing the excess part of the non-magnetic material above the recording layer by ion beam etching to flatten the surfaces of the non-magnetic layer and the recording layer.
    • 提供了一种用于制造磁记录介质的方法,其可以有效地制造包括以凹凸图案形成的记录层的磁记录介质,具有足够平坦的表面,并且提供良好的记录和再现精度。 该方法包括:非磁性材料填充步骤,将非磁性材料沉积在基板上以预定的凹凸图案形成的记录层上,从而用非磁性填充凹凸图案的凹部 材料; 以及通过离子束蚀刻去除记录层上方的非磁性材料的剩余部分的平坦化步骤,以使非磁性层和记录层的表面变平。