公开(公告)号：US07876530B2

公开(公告)日：2011-01-25

申请号：US12387164

申请日：2009-04-28

申请人： Tatsuya Hinoue ,  Yotsuo Yahisa ,  Tomoo Yamamoto ,  Jo Inagaki ,  Hiroyuki Suzuki ,  Masae Suzuki, legal representative ,  Hidekazu Kashiwase

发明人： Tatsuya Hinoue ,  Yotsuo Yahisa ,  Tomoo Yamamoto ,  Jo Inagaki ,  Hiroyuki Suzuki ,  Hidekazu Kashiwase

IPC分类号： G11B5/66 ,  B32B3/02

CPC分类号： G11B5/65 ,  G11B5/656 ,  G11B5/66 ,  H01F10/16 ,  H01F10/265

摘要： In one embodiment, a magnetic recording medium comprises an underlying film, a magnetic film and a protective film formed in this order on a substrate. The magnetic film is a cobalt-base alloy film containing chromium and has a plurality of magnetic layers stacked without interposition of any non-magnetic layer. The plural magnetic layers comprise first, second and third magnetic layers. The first magnetic layer is disposed between the underlying film and the second magnetic layer. The second magnetic layer is disposed between the first magnetic layer and the third magnetic layer. The third magnetic layer is disposed between the second magnetic layer and the protective film. The concentration of chromium contained in the first magnetic layer is lower than that of chromium contained in the second magnetic layer. The thickness of the first magnetic layer is smaller than that of the second magnetic layer. The magnetic layers which overlie the first magnetic layer further contain platinum and boron. The concentration of chromium contained in the third magnetic layer is lower than that of chromium contained in the second magnetic layer.

摘要翻译： 在一个实施例中，磁记录介质包括在衬底上依次形成的下面的膜，磁性膜和保护膜。 磁性膜是含有铬的钴基合金膜，并且具有堆叠而不插入任何非磁性层的多个磁性层。 多个磁性层包括第一，第二和第三磁性层。 第一磁性层设置在下面的膜和第二磁性层之间。 第二磁性层设置在第一磁性层和第三磁性层之间。 第三磁性层设置在第二磁性层和保护膜之间。 第一磁性层中含有的铬的浓度低于第二磁性层中含有的铬的浓度。 第一磁性层的厚度小于第二磁性层的厚度。 覆盖在第一磁性层上的磁性层还含有铂和硼。 第三磁性层中含有的铬的浓度低于第二磁性层中含有的铬的浓度。

公开(公告)号：US08221192B2

公开(公告)日：2012-07-17

申请号：US12537982

申请日：2009-08-07

申请人： Hidekazu Kashiwase ,  Hiroyuki Suzuki ,  Masae Suzuki, legal representative ,  Mitsuhiro Shoda ,  Takayoshi Ohtsu ,  Kiyoshi Hashimoto

发明人： Hidekazu Kashiwase ,  Hiroyuki Suzuki ,  Mitsuhiro Shoda ,  Takayoshi Ohtsu ,  Kiyoshi Hashimoto

IPC分类号： B24B49/00

CPC分类号： G11B5/8404 ,  G11B5/3136 ,  G11B5/455 ,  G11B5/6064

摘要： A magnetic-recording-disk test-head. The magnetic-recording-disk test-head includes a slider, a test pad and a slider-surface-shape control mechanism. The slider includes a leading edge and a trailing edge. The test pad is disposed at a trailing-edge side of the slider and is configured to remove and to detect asperities on a magnetic-recording disk. The slider-surface-shape control mechanism is configured to change a shape of an air-bearing surface of the slider and is disposed at a leading-edge side of the slider.

摘要翻译： 磁记录盘测试头。 磁记录盘测试头包括滑块，测试垫和滑块表面形状控制机构。 滑块包括前缘和后缘。 测试垫设置在滑块的后缘侧，并且被配置为移除并检测磁记录盘上的凹凸。 滑块表面形状控制机构构造为改变滑块的空气轴承表面的形状并且设置在滑块的前缘侧。

公开(公告)号：US08169728B2

公开(公告)日：2012-05-01

申请号：US12630728

申请日：2009-12-03

申请人： Hiroaki Nemoto ,  Hiroyuki Suzuki ,  Masae Suzuki, legal representative ,  Miki Hara ,  Yoshio Suzuki

发明人： Hiroaki Nemoto ,  Hiroyuki Suzuki ,  Miki Hara ,  Yoshio Suzuki

IPC分类号： G11B5/09 ,  G11B5/596 ,  G11B5/82

CPC分类号： G11B5/82 ,  B82Y10/00 ,  G11B5/59616 ,  G11B5/743 ,  G11B5/855

摘要： To avoid the occurrence of a recording error by suppressing the influence that a magneto-static interaction acting between the pattern dots exerts on a recording process and expand a margin for recording synchronization timing lag or tracking misregistration on the pattern dot. Each pattern dot has a structure in which a plurality of parts having different magnetization reversal fields are bonded with exchange interaction in the in-plane direction of a medium, substrate. The positional relationship between the parts having different magnetization reversal fields is substantially coincident between the adjacent pattern dots, which are arranged to have a gradient of magnetization reversal field in a track direction or track transverse direction. Further, the recording is performed by adapting a gradient of recording magnetic field to the gradient of magnetization reversal field. Other methods and systems are described as well.

摘要翻译： 通过抑制作用在图形点之间的磁静电相互作用在记录处理上并且扩大用于记录同步定时滞后或跟踪图案点上的重合失调的余量的影响，避免了记录错误的发生。 每个图案点具有其中具有不同磁化反转场的多个部分在介质，衬底的面内方向上以交换相互作用结合的结构。 具有不同的磁化反转场的部分之间的位置关系在相邻的图形点之间基本一致，相邻的图形点被布置成在轨道方向或轨道横向方向上具有磁化反转场的梯度。 此外，通过使记录磁场的梯度适应于磁化反转场的梯度来进行记录。 还描述了其他方法和系统。