MAGNETIC-DISK GLASS SUBSTRATE AND MAGNETIC DISK
    2.
    发明申请
    MAGNETIC-DISK GLASS SUBSTRATE AND MAGNETIC DISK 有权
    磁条盘基板和磁盘

    公开(公告)号:US20150213826A1

    公开(公告)日:2015-07-30

    申请号:US14424261

    申请日:2013-06-28

    CPC classification number: G11B5/7315 G11B5/82

    Abstract: A magnetic-disk glass substrate of the present invention has an average value of squares of inclinations of 0.0025 or less and a frequency at which squares of inclinations are 0.004 or more of 15% or less, in a case where samples of inclinations on a main surface are obtained at intervals of 10 nm.

    Abstract translation: 在本发明的磁盘玻璃基板中,在主体上倾斜的样本的情况下,倾斜平方的平均值为0.0025以下,倾斜方格为0.004以上的频率为15%以下 以10nm的间隔获得表面。

    Magnetic disk substrate with offset portion on a main surface within a range of 92.0 to 97.0% in a radial direction from a center, magnetic disk with substrate and magnetic disk device
    5.
    发明授权
    Magnetic disk substrate with offset portion on a main surface within a range of 92.0 to 97.0% in a radial direction from a center, magnetic disk with substrate and magnetic disk device 有权
    在主表面上具有偏移部分的磁盘基板,从中心沿径向方向为92.0〜97.0%,具有基板的磁盘和磁盘装置

    公开(公告)号:US09183866B2

    公开(公告)日:2015-11-10

    申请号:US14551675

    申请日:2014-11-24

    CPC classification number: G11B5/7315 G11B5/82

    Abstract: A magnetic disk substrate having a flat main surface, an end face, and a chamfered face formed between the main surface and the end face. The substrate has an offset portion, present on the main surface within a range of 92.0 to 97.0% in a radial direction from a center of the substrate. A distance from the center of the substrate to the end face of the substrate in a radial direction is 100%, the offset portion being raised or lowered with respect to a virtual straight line connecting two points on the main surface, set at positions of 92.0% and 97.0%. A maximum distance from the virtual straight line to the offset portion in a direction perpendicular to the virtual straight line is a “maximum offset value.”

    Abstract translation: 一种磁盘基板,其具有平坦的主表面,端面和形成在主表面和端面之间的倒角面。 该基板具有偏离部分,该主体表面在距离基板中心的径向方向上在92.0至97.0%的范围内。 从基板的中心到基板的端面的径向方向的距离为100%,偏移部相对于连接主面上的两点的虚拟直线上升或下降,设定在92.0的位置 %和97.0%。 在与虚拟直线垂直的方向上从虚拟直线到偏移部分的最大距离为“最大偏移值”。

    Method for producing glass substrate for magnetic disk and method for manufacturing magnetic disk
    7.
    发明授权
    Method for producing glass substrate for magnetic disk and method for manufacturing magnetic disk 有权
    制造磁盘用玻璃基板的方法及磁盘制造方法

    公开(公告)号:US09038417B2

    公开(公告)日:2015-05-26

    申请号:US14275630

    申请日:2014-05-12

    CPC classification number: B24B7/241 C03C19/00 C03C23/0075 G11B5/8404

    Abstract: When mirror polishing is performed on a glass substrate by bringing a polishing pad into contact with the surface of the glass substrate while supplying a polishing liquid containing polishing grains to the substrate surface, the pH of the polishing liquid is maintained within a certain range or the agglomeration degree or dispersion degree of the polishing liquid is controlled. Consequently, an adequate mirror polishing rate can be maintained and there can be obtained a glass substrate having a good end shape.

    Abstract translation: 当在玻璃基板上进行镜面抛光时,通过使抛光垫与玻璃基板的表面接触,同时向衬底表面供给包含抛光颗粒的抛光液体,将抛光液的pH保持在一定范围内或 控制研磨液的附聚度或分散度。 因此,可以保持足够的镜面研磨速度,并且可以获得具有良好端部形状的玻璃基板。

Patent Agency Ranking