公开(公告)号：US07875372B2

公开(公告)日：2011-01-25

申请号：US11985279

申请日：2007-11-13

Applicant: Toshinori Ono ,  Hiroyuki Matsumoto ,  Mitsuhiro Shoda ,  Hiroshi Kanai

Inventor： Toshinori Ono ,  Hiroyuki Matsumoto ,  Mitsuhiro Shoda ,  Hiroshi Kanai

IPC: G11B5/66

CPC classification number: G11B5/72 ,  C23C16/26 ,  C23C16/45523 ,  C23C28/321 ,  C23C28/322 ,  C23C28/343 ,  G11B5/1278 ,  G11B5/667 ,  G11B5/82 ,  G11B5/8408

Abstract: Embodiments of the present invention help to improve corrosion resistance and durability by providing a functional diamond like carbon (DLC) protective layer for a perpendicular magnetic recording medium using a granular magnetic layer. According to one embodiment, when a DLC protective layer that protects a granular magnetic layer of a perpendicular magnetic recording medium is formed using a CVD method, the thickness of a first layer on the granular magnetic layer is set to 7.5 to 25% of the total thickness of the protective layer and a hydrogen content of the first layer is set to 33 to 38%, the thickness of a second layer is set to 50 to 85% of the total thickness of the protective layer and a nitrogen content of the second layer is set to 3 to 7%, and the thickness of a third layer located at the outermost side of the protective layer is set to 7.5 to 25% of the total thickness of the protective layer and a hydrogen content of the third layer is set to 25% or less.

Abstract translation: 本发明的实施方式通过为使用粒状磁性层的垂直磁记录介质提供功能性金刚石碳（DLC）保护层，有助于提高耐腐蚀性和耐久性。 根据一个实施例，当使用CVD方法形成保护垂直磁记录介质的粒状磁性层的DLC保护层时，粒状磁性层上的第一层的厚度设定为总体的7.5〜25％ 保护层的厚度和第一层的氢含量设定为33〜38％，第二层的厚度设定为保护层的总厚度的50〜85％，第二层的氮含量 设定为3〜7％，将位于保护层最外侧的第3层的厚度设定为保护层的总厚度的7.5〜25％，将第3层的氢含量设定为 25％以下。

公开(公告)号：US07718282B2

公开(公告)日：2010-05-18

申请号：US11259921

申请日：2005-10-26

Applicant: Shigehiko Fujimaki ,  Toshinori Ono ,  Mitsuhiro Shoda

Inventor： Shigehiko Fujimaki ,  Toshinori Ono ,  Mitsuhiro Shoda

IPC: G11B5/66

CPC classification number: G11B5/667 ,  G11B5/65 ,  G11B5/8408 ,  G11B5/851

Abstract: A magnetic recording medium with a granular magnetic recording layer excellent in corrosion resistance is provided. In one embodiment, after formation of, on a non-magnetic substrate, an NiTa adhesion layer, a soft magnetic layer, a Ta intermediate layer, an Ru intermediate layer, and a Co alloy granular magnetic recording layer, hydrogen (H2) plasma processing is applied to the surface of the Co alloy granular magnetic recording layer. Then, a DLC protective film layer is formed and a lubricant layer is coated.

Abstract translation: 提供具有耐腐蚀性优良的粒状磁记录层的磁记录介质。 在一个实施例中，在非磁性基板上形成NiTa粘附层，软磁性层，Ta中间层，Ru中间层和Co合金粒状磁记录层之后，形成氢（H 2）等离子体处理 施加到Co合金粒状磁记录层的表面。 然后，形成DLC保护膜层并涂覆润滑剂层。

公开(公告)号：US20060121317A1

公开(公告)日：2006-06-08

申请号：US11288546

申请日：2005-11-28

Applicant: Yuichi Kokaku ,  Mitsuhiro Shoda ,  Hiroyuki Matsumoto ,  Mikio Suzuki ,  Takehiko Hamaguchi ,  Yuzuru Hosoe

Inventor： Yuichi Kokaku ,  Mitsuhiro Shoda ,  Hiroyuki Matsumoto ,  Mikio Suzuki ,  Takehiko Hamaguchi ,  Yuzuru Hosoe

IPC: B05D5/12

CPC classification number: G11B20/10009 ,  G11B5/4555 ,  G11B5/65 ,  G11B5/667 ,  G11B5/8404 ,  G11B20/1816

Abstract: The present invention restricts defect density on the magnetic disk based on predetermined polishing conditions by applying a magnetic field to the entire surface of a magnetic disk in a direction vertical thereto, rotating the magnetic disk, loading a magnetic head to the magnetic disk, reproducing signals from the magnetic disk, processing the reproduced signals by a waveform analyzer, counting pulse waveforms of 0.9 times or more a servo-bit length at ½ threshold value of an average output, and measuring the defect density on the magnetic disk giving an undesired effect on the I/O performance of the magnetic disk drive. In a case of a magnetic recording medium using a vertical magnetic recording system, even with fine defect of magnetic layer, a servo pattern cannot be judged correctly. This provides degradation of the I/O performance of increasing the time necessary for reading out large capacity data, lowering the performance of the entire magnetic disk drive.

Abstract translation: 本发明基于预定的抛光条件来限制磁盘上的缺陷密度，通过向垂直于其的方向的磁盘的整个表面施加磁场，旋转磁盘，将磁头加载到磁盘，再现信号 通过波形分析器对再生信号进行处理，对平均输出的1/2阈值的伺服位长度的0.9倍以上的脉冲波形进行计数，并测量磁盘上的缺陷密度，给出不期望的影响 磁盘驱动器的I / O性能。 在使用垂直磁记录系统的磁记录介质的情况下，即使磁性层的细小缺陷，也不能正确判断伺服图案。 这提供了I / O性能的劣化，从而增加了读取大容量数据所需的时间，降低了整个磁盘驱动器的性能。

公开(公告)号：US20060093864A1

公开(公告)日：2006-05-04

申请号：US11259921

申请日：2005-10-26

Applicant: Shigehiko Fujimaki ,  Toshinori Ono ,  Mitsuhiro Shoda

Inventor： Shigehiko Fujimaki ,  Toshinori Ono ,  Mitsuhiro Shoda

IPC: G11B5/66 ,  B05D5/12 ,  B29C71/04

CPC classification number: G11B5/667 ,  G11B5/65 ,  G11B5/8408 ,  G11B5/851

Abstract: A magnetic recording medium with a granular magnetic recording layer excellent in corrosion resistance is provided. In one embodiment, after formation of, on a non-magnetic substrate, an NiTa adhesion layer, a soft magnetic layer, a Ta intermediate layer, an Ru intermediate layer, and a Co alloy granular magnetic recording layer, hydrogen (H2) plasma processing is applied to the surface of the Co alloy granular magnetic recording layer. Then, a DLC protective film layer is formed and a lubricant layer is coated.

Abstract translation: 提供具有耐腐蚀性优良的粒状磁记录层的磁记录介质。 在一个实施例中，在非磁性基板上形成NiTa粘附层，软磁性层，Ta中间层，Ru中间层和Co合金粒状磁记录层之后，形成氢（H 2 O） 2 Co等离子体处理被施加到Co合金粒状磁记录层的表面。 然后，形成DLC保护膜层并涂覆润滑剂层。

公开(公告)号：US20050095461A1

公开(公告)日：2005-05-05

申请号：US10980179

申请日：2004-11-04

Applicant: Hiroyuki Matsumoto ,  Hiroshi Tani ,  Mitsuhiro Shoda ,  Koji Sonoda ,  Takayuki Nakakawaji ,  Mina Amo ,  Yutaka Ito

Inventor： Hiroyuki Matsumoto ,  Hiroshi Tani ,  Mitsuhiro Shoda ,  Koji Sonoda ,  Takayuki Nakakawaji ,  Mina Amo ,  Yutaka Ito

IPC: C10M105/74 ,  C10M107/38 ,  C10M107/48 ,  G11B5/012 ,  G11B33/14 ,  G11B5/82

CPC classification number: G11B33/148 ,  C10M105/74 ,  C10M107/38 ,  C10M107/48 ,  G11B5/012 ,  G11B33/1446 ,  Y10T428/24355 ,  Y10T428/24992 ,  Y10T428/265

Abstract: A magnetic disk to which is applied a first lubricating agent formed as (where p=0 or an integer of at least 1, q=0 or an integer of at least 1, and X=1-5), and over which is applied a second lubricating agent formed as HOCH2CF2(OC2F4)p(OCF2)qOCF2CH2OH (where p=0 or an integer of at least 1, q=0 or an integer of at least 1.

Abstract translation: 一种磁盘，其上形成为（其中p = 0或至少为1的整数，q = 0或至少为1的整数，X = 1-5）的第一润滑剂，并且在其上施加 形成为<？in-line-formula description =“In-line Formulas”end =“lead”→HOCH 2 CF 2的第二润滑剂（OC _{CH 2 OH <βin-line-formula description =“In-line Formulas”end =“tail”？>（其中p = 0或至少为1的整数，q = 0 或至少为1的整数。}

公开(公告)号：US06816341B2

公开(公告)日：2004-11-09

申请号：US10347912

申请日：2003-01-22

Applicant: Hiroyuki Matsumoto ,  Hiroshi Tani ,  Mitsuhiro Shoda ,  Koji Sonoda ,  Takayuki Nakakawaji ,  Mina Amo ,  Yutaka Ito

Inventor： Hiroyuki Matsumoto ,  Hiroshi Tani ,  Mitsuhiro Shoda ,  Koji Sonoda ,  Takayuki Nakakawaji ,  Mina Amo ,  Yutaka Ito

IPC: G11B582

CPC classification number: G11B33/148 ,  C10M105/74 ,  C10M107/38 ,  C10M107/48 ,  G11B5/012 ,  G11B33/1446 ,  Y10T428/24355 ,  Y10T428/24992 ,  Y10T428/265

Abstract: A recording element or a reproducing element in a head generates heat that decomposes lubricating agent adhered to a slider surface near the recording/reproducing element of the head. This decomposed lubricating agent leads to corrosion of the magnetic layer and the like of the magnetic disk. The lubricating agent undergoes volume expansion due to this corrosion, creating a protrusion on the magnetic disk surface to which the lubricating agent is adhered. The magnetic disk surface to which the lubricating agent is adhered comes into contact with the magnetic head, leading to friction with the protective layer, the magnetic layer, and the like. In the worst case, this can lead to secondary errors where data recorded on the magnetic layer is erased. To prevent such secondary errors, the present invention provides a hard disk drive including: a magnetic disk to which is applied a first lubricating agent formed as (where p=0 or an integer of at least 1, q=0 or an integer of at least 1, and X=1-5); and a mechanism for supplying a second lubricating agent to the magnetic disk having an average molecular weight of no more than 2,400 and no less than 600 and formed as HOCH2CF2(OC2F4)p(OCF2)qOCF2CH2OH (where p=0 or an integer of at least 1 and q=0 or an integer of at least 1).

Abstract translation: 头部中的记录元件或再现元件产生热量，其分解粘附到头部的记录/再现元件附近的滑块表面的润滑剂。 这种分解润滑剂导致磁盘的磁性层等的腐蚀。 润滑剂由于这种腐蚀而经历体积膨胀，在粘附有润滑剂的磁盘表面上产生突起。 粘附有润滑剂的磁盘表面与磁头接触，导致与保护层，磁性层等的摩擦。 在最坏的情况下，这可能导致二级错误，其中记录在磁性层上的数据被擦除。 为了防止这种二次错误，本发明提供一种硬盘驱动器，其包括：磁盘，其上施加有第一润滑剂，其形成为（其中p = 0或至少为1的整数，q = 0或整数at 至少1，X = 1-5）; 以及将第二润滑剂供给到平均分子量不大于2400且不小于600的磁盘的机构，其形成为（其中p = 0或至少为1的整数，q = 0或整数为 至少1）。

公开(公告)号：US08018673B2

公开(公告)日：2011-09-13

申请号：US12618685

申请日：2009-11-13

Applicant: Manabu Saikawa ,  Atsushi Takeichi ,  Yuki Hashimoto ,  Kenji Kuroki ,  Mitsuhiro Shoda

Inventor： Manabu Saikawa ,  Atsushi Takeichi ,  Yuki Hashimoto ,  Kenji Kuroki ,  Mitsuhiro Shoda

IPC: G11B21/02 ,  G11B27/36

CPC classification number: G11B5/6005 ,  G11B5/59633 ,  G11B5/59638 ,  G11B5/6064

Abstract: A disk drive. The disk drive includes a plurality of head-sliders, an actuator, a plurality of clearance adjustment sections, and a controller. Each head-slider includes a slider and a magnetic-recording head on the slider for accessing a disk for storing data. The plurality of head-sliders is secured to the actuator that is configured to move the plurality of head-sliders concurrently. Each clearance adjustment section corresponds to each head-slider of the plurality of head-sliders and adjusts a clearance of the corresponding head-slider. In addition, the controller is configured to position the actuator by servo control with a first head-slider selected from the plurality of head-sliders, to change a clearance of a second head-slider different from the first head-slider by controlling a clearance adjustment section of the second head-slider to bring the second head-slider into contact with a disk, and to detect the contact to measure the clearance of the second head-slider.

Abstract translation: 磁盘驱动器 磁盘驱动器包括多个磁头滑块，致动器，多个间隙调整部分和控制器。 每个头部滑动器包括滑动器和滑块上的磁记录头，用于访问用于存储数据的磁盘。 多个头部滑块被固定到致动器，其被构造成同时移动多个头部滑块。 每个间隙调节部分对应于多个头部滑块中的每个头部滑块，并且调整相应的头部 - 滑块的间隙。 此外，控制器被配置为通过伺服控制来定位致动器，其中第一头滑块选自多个头部滑块，以通过控制间隙来改变与第一头部滑块不同的第二头部滑块的间隙 调节部分，使第二磁头滑块与磁盘接触，并检测接触件以测量第二磁头滑块的间隙。

公开(公告)号：US20110069410A1

公开(公告)日：2011-03-24

申请号：US12537982

申请日：2009-08-07

Applicant: Hidekazu KASHIWASE ,  Hiroyuki SUZUKI ,  Mitsuhiro SHODA ,  Takayoshi OHTSU ,  Kiyoshi HASHIMOTO

Inventor： Hidekazu KASHIWASE ,  Hiroyuki SUZUKI ,  Mitsuhiro SHODA ,  Takayoshi OHTSU ,  Kiyoshi HASHIMOTO

IPC: G11B21/02 ,  G11B5/60

CPC classification number: G11B5/8404 ,  G11B5/3136 ,  G11B5/455 ,  G11B5/6064

Abstract: 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.

Abstract translation: 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：US20100123970A1

公开(公告)日：2010-05-20

申请号：US12618685

申请日：2009-11-13

Applicant: Manabu Saikawa ,  Atsushi Takeichi ,  Yuki Hashimoto ,  Kenji Kuroki ,  Mitsuhiro Shoda

Inventor： Manabu Saikawa ,  Atsushi Takeichi ,  Yuki Hashimoto ,  Kenji Kuroki ,  Mitsuhiro Shoda

IPC: G11B21/02 ,  G11B21/16

CPC classification number: G11B5/6005 ,  G11B5/59633 ,  G11B5/59638 ,  G11B5/6064

Abstract: A disk drive. The disk drive includes a plurality of head-sliders, an actuator, a plurality of clearance adjustment sections, and a controller. Each head-slider includes a slider and a magnetic-recording head on the slider for accessing a disk for storing data. The plurality of head-sliders is secured to the actuator that is configured to move the plurality of head-sliders concurrently. Each clearance adjustment section corresponds to each head-slider of the plurality of head-sliders and adjusts a clearance of the corresponding head-slider. In addition, the controller is configured to position the actuator by servo control with a first head-slider selected from the plurality of head-sliders, to change a clearance of a second head-slider different from the first head-slider by controlling a clearance adjustment section of the second head-slider to bring the second head-slider into contact with a disk, and to detect the contact to measure the clearance of the second head-slider.

Abstract translation: 磁盘驱动器 磁盘驱动器包括多个磁头滑块，致动器，多个间隙调整部分和控制器。 每个头部滑动器包括滑动器和滑块上的磁记录头，用于访问用于存储数据的磁盘。 多个头部滑块被固定到致动器，其被构造成同时移动多个头部滑块。 每个间隙调节部分对应于多个头部滑块中的每个头部滑块，并且调整相应的头部 - 滑块的间隙。 此外，控制器被配置为通过伺服控制来定位致动器，其中第一头滑块选自多个头部滑块，以通过控制间隙来改变与第一头部滑块不同的第二头部滑块的间隙 调节部分，使第二磁头滑块与磁盘接触，并检测接触件以测量第二磁头滑块的间隙。

公开(公告)号：US07042678B2

公开(公告)日：2006-05-09

申请号：US10602603

申请日：2003-06-25

Applicant: Ryuji Tsuchiyama ,  Hiroshi Tani ,  Mikio Tokuyama ,  Hidekazu Kohira ,  Masayuki Kurita ,  Mitsuhiro Shoda ,  Junguo Xu ,  Masaaki Matsumoto

Inventor： Ryuji Tsuchiyama ,  Hiroshi Tani ,  Mikio Tokuyama ,  Hidekazu Kohira ,  Masayuki Kurita ,  Mitsuhiro Shoda ,  Junguo Xu ,  Masaaki Matsumoto

IPC: G11B17/32

CPC classification number: G11B5/6005

Abstract: A magnetic head slider in which a leading pad is projected in a thicknesswise direction of the slider, in comparison with a trailing pad so as to reduce vibration caused by contact between a flat medium surface of a disc and the slider carrying thereon a magnetic head, to reduce variation in flying height caused by wavy unevenness of the medium surface, and to reduce variation in atmospheric pressure around the slider, thereby it is possible to enhance the recording density and the reliability of the magnetic head slider while reducing the costs thereof. Further, a magnetic disc unit using the above-mentioned magnetic head slider.

Abstract translation: 一种磁头滑动器，其中前导垫沿着滑块的厚度方向突出，与后垫相比，以减少由平坦的介质表面与承载磁头的滑块之间的接触引起的振动， 为了减少由于介质表面的波浪状不均匀性引起的飞行高度的变化，并且减小滑动件周围的大气压力的变化，从而可以提高磁头滑块的记录密度和可靠性，同时降低其成本。 此外，使用上述磁头滑块的磁盘单元。