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    • 1. 发明授权
    • Magnetic disk apparatus employing liquid bearing type or physical
contact type magnetic head slider
    • 采用液体轴承型或物理接触式磁头滑块的磁盘装置
    • US5835305A
    • 1998-11-10
    • US353983
    • 1994-12-06
    • Tetsuya HamaguchiYoshihiro ShiroishiYukio KatoMasaaki MatsumotoHiromitsu TokisueTakayuki NakakawajiShuji Imazeki
    • Tetsuya HamaguchiYoshihiro ShiroishiYukio KatoMasaaki MatsumotoHiromitsu TokisueTakayuki NakakawajiShuji Imazeki
    • G11B5/60G11B5/58
    • G11B5/581
    • A magnetic storage apparatus includes a substantially non-flexible magnetic recording medium, a magnetic head slider having a reading/writing element mounted therein and liquid lubricant provided on the surface of the magnetic recording medium. The liquid lubricant is a liquid in a Newtonian range having a viscosity which is substantially constant irrespective of a shear rate or a liquid having the property that the actual viscosity is increased with increase of the shear rate. The magnetic head slider maintains a gap between the slider and the magnetic recording medium to perform reading and writing while being moved on the liquid lubricant intermittently or continuously in a contact manner with the liquid lubricant. There is provided a device for maintaining a constant flying height even if a movement speed is varied, which flying height is represented by the size of the gap. Thus, the magnetic storage apparatus of the liquid bearing system or the contact system has only very small forces such as liquid drag force and friction force or sticking force and is capable of performing stable slider movement, performing high-speed seeking operation with high reliability and performing high-density recording.
    • 磁性存储装置包括基本上非柔性的磁记录介质,具有安装在其中的读/写元件的磁头滑块和设置在磁记录介质表面上的液体润滑剂。 液体润滑剂是牛顿范围内的液体,其粘度基本上恒定,与剪切速率无关,或液体具有实际粘度随着剪切速率的增加而增加的性质。 磁头滑动器在滑动器和磁记录介质之间保持间隙,以便以与液体润滑剂接触的方式间歇地或连续地在液体润滑剂上移动来进行读写。 提供了一种用于保持恒定飞行高度的装置,即使移动速度变化,飞行高度由间隙的大小表示。 因此,液体轴承系统或接触系统的磁存储装置仅具有非常小的力,例如液体拖曳力和摩擦力或粘着力,并且能够执行稳定的滑块移动,以高可靠性执行高速寻找操作, 执行高密度录音。
    • 4. 发明授权
    • Magnetic disk and magnetic recording/reproduction apparatus
    • 磁盘和磁记录/再现装置
    • US06296917B1
    • 2001-10-02
    • US09051711
    • 1998-04-17
    • Takayuki NakakawajiMitsuyoshi ShoujiTomoe TakamuraHiroshi SasakiShuji ImazekiYutaka Ito
    • Takayuki NakakawajiMitsuyoshi ShoujiTomoe TakamuraHiroshi SasakiShuji ImazekiYutaka Ito
    • G11B5725
    • G11B5/725Y10S428/90Y10T428/24355Y10T428/30Y10T428/3154Y10T428/31544
    • A lubricating film is provided for a magnetic disk having a data region and a CSS region formed on its surface. The lubricating film ensures low stiction and good resistance to contact sliding in the data region and also ensures good CSS durability in the CSS region. Therefore, it is possible to provide a magnetic disk and a magnetic recording/reproducing device which do not cause problems with sliding between the magnetic head and the magnetic disk while the apparatus is running normally and even when the apparatus stops accidentally. The lubricating film formed in the data region of the magnetic disk is firmly fixed to the surface of the magnetic disk and is hardly liable to stiction. In addition, it is thick enough to ensure good durability even in the case of contact sliding. The lubricating film formed in the CSS region is composed of a lubricant which is firmly fixed to the surface of the magnetic disk and another lubricant which is weakly fixed to the surface of the magnetic disk; therefore, it is superior in CSS durability. This contributes to the highly reliable magnetic disk and magnetic recording/reproducing device.
    • 为具有形成在其表面上的数据区域和CSS区域的磁盘提供润滑膜。 润滑膜确保数据区域的低粘滞性和良好的接触滑动性,并且还确保CSS区域中的良好的CSS耐久性。 因此,可以提供一种磁盘和磁记录/再现装置,当装置运行正常并且即使装置意外停止时也不会在磁头和磁盘之间滑动的问题。 形成在磁盘的数据区域中的润滑膜牢固地固定在磁盘的表面上,并且几乎不易于凝固。 此外,即使在接触滑动的情况下,其足够厚以确保良好的耐久性。 形成在CSS区域中的润滑膜由固定在磁盘表面上的润滑剂和与磁盘表面弱固定的另一种润滑剂构成。 因此,CSS耐用性优越。 这有助于高度可靠的磁盘和磁记录/再现装置。
    • 8. 发明申请
    • THERMALLY ASSISTED MAGNETIC RECORDING DISK DRIVE
    • 热辅助磁记录盘驱动
    • US20100195240A1
    • 2010-08-05
    • US12696635
    • 2010-01-29
    • Takayuki NakakawajiMina Amo
    • Takayuki NakakawajiMina Amo
    • G11B5/02
    • G11B5/40G11B5/725G11B25/043G11B33/144G11B2005/0021
    • A thermally assisted magnetic recording disk drive, comprises: a magnetic recording medium, on a surface of non-magnetic substrate of which are formed an under layer, a vertical magnetic recording layer, a protective layer and a lubricant layer, sequentially; a recording/reproducing head having a magnetic pole, which is configured to apply a magnetic field onto the magnetic recording medium, and a heating means, which is configured to heat an area being applied with a magnetic field by means of a near-field light; a mechanism, which is configured to rotate the magnetic recording medium; a mechanism, which is configured to position the recording/reproducing head; and a circuit, which is configured to process a recording/reproducing signal, and further comprising, a plate-like structure, which supplies a lubricant onto a surface of the magnetic recording medium and thereby having a function of cooling the surface of the magnetic recording medium.
    • 一种热辅助磁记录盘驱动器,包括:磁记录介质,其非磁性基板的表面形成下层,垂直磁记录层,保护层和润滑剂层; 具有磁极的记录/再现头,其被配置为向磁记录介质施加磁场;以及加热装置,其被配置为通过近场光加热施加磁场的区域 ; 被配置为旋转磁记录介质的机构; 被配置为定位记录/再现头的机构; 以及被配置为处理记录/再现信号的电路,还包括板状结构,其将润滑剂供应到磁记录介质的表面上,从而具有冷却磁记录表面的功能 中。
    • 9. 发明授权
    • Lubricant, magnetic disk and magnetic disk apparatus
    • 润滑剂,磁盘和磁盘装置
    • US06555197B1
    • 2003-04-29
    • US09561216
    • 2000-04-28
    • Mina IshidaTakayuki NakakawajiYutaka ItoHiroyuki MatsumotoHiroshi TaniHeigo Ishihara
    • Mina IshidaTakayuki NakakawajiYutaka ItoHiroyuki MatsumotoHiroshi TaniHeigo Ishihara
    • G11B5725
    • G11B5/725G11B5/71G11B33/148Y10T428/3154
    • A lubricant which does not splash easily and has an improved property of slidableness, and a magnetic disk using the lubricant are provided. A magnetic disk apparatus featuring a prolonged service life of a stable operation and an excellent record reproduction property is provided by installing the above magnetic disk. The lubricant of the invention contains perfluoropolyether expressed by the following general formula, in which a component of its molecular weights less than 1000 is smaller than 10 wt. %, a component of its molecular weights not less than 7000 is smaller than 15 wt. %, a ratio between a weight average molecular weight and a numeric average molecular weight is 1.5 or less, and a substitution ratio of its terminal functional group is not less than 90%: R1—CF2O—[—(CF2CF2O )—m—(CF2O)—n—]—CF2—R2  (1), where R1 and R2 are univalent organic groups, m and n are positive integers. Further for the magnetic disk which rotates at a speed of 10000 rpm or more, a lubricant containing a perfluoropolyether expressed by the following general formula is used, in which its numeric average molecular weight is not less than 5500, a component of molecular weights less than 3000 is 15 wt. % or less, a ratio between its weight average molecular weight and its numeric average molecular weight is 1.5 or less, and a substitution ratio of its terminal functional group is not less than 90%: HOCH2—CF2O—[—CF2CF2O]—m—[CF2O]—n—CF2—CH2OH  (2), where m and n are positive integers.
    • 提供不容易飞溅并且具有改善的滑动性的润滑剂和使用润滑剂的磁盘。 通过安装上述磁盘来提供具有延长的稳定操作的使用寿命和良好的记录再现性能的磁盘装置。 本发明的润滑剂包含由以下通式表示的全氟聚醚,其中分子量小于1000的组分小于10重量%。 %,其分子量不小于7000的组分小于15重量%。 %,重均分子量与数均分子量之比为1.5以下,其末端官能团的取代率为90%以上:其中,R1和R2为单价有机基团,m和n为 正整数。 此外,对于以10000rpm以上的速度旋转的磁盘,使用含有由以下通式表示的全氟聚醚的润滑剂,其数均分子量不小于5500,分子量小于 3000是15wt。 %以下,其重均分子量与数均分子量之比为1.5以下,其末端官能团的取代率为90%以上:m和n为正整数。