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1. 发明申请

US20030218461A1 Magnetic recording medium inspection method 失效
标题翻译：磁记录介质检查方法
公开(公告)号：US20030218461A1
公开(公告)日：2003-11-27
申请号：US10386637
申请日：2003-03-12
申请人： FUJITSU LIMITED
发明人： Toru Yokohata , Takahiro Imamura , Toshiya Fujita , Yojiro Ochiai , Masahiro Ozeki , Naoki Satake
IPC分类号： G01V003/00
CPC分类号： G11B5/6005 , G01R33/1207 , G11B5/00 , G11B5/012 , G11B2005/001
摘要： A magnetic recording medium inspection method for detecting a small protrusion that constitutes a defect on a surface of a magnetic recording medium, the method comprising the steps of flying a glide inspection head at a predetermined height over a surface of the moving magnetic recording medium; detecting a contact duration time during which the glide head is in contact with the protrusion on the surface of the magnetic recording medium using a contact detection sensor attached to the glide inspection head; and determining the small protrusion based on the contact duration time.
摘要翻译：一种用于检测构成磁记录介质表面上的缺陷的小突起的磁记录介质检查方法，所述方法包括以下步骤：使移动磁记录介质的表面上的预定高度的滑动检查头飞行; 使用附接到所述滑行检查头的接触检测传感器来检测所述滑动头与所述磁记录介质的表面上的突起接触的接触持续时间; 以及基于所述接触持续时间确定所述小突起。

2. 发明申请

US20010033452A1 Head assembly employing microactuator in recording medium drive 失效
标题翻译：头部组件在记录介质驱动中使用微致动器
公开(公告)号：US20010033452A1
公开(公告)日：2001-10-25
申请号：US09738163
申请日：2000-12-15
申请人： FUJITSU LIMITED
发明人： Shinji Koganezawa , Takahiro Imamura
IPC分类号： G11B005/56 , G11B005/596
CPC分类号： G11B5/5556 , G11B5/5552 , H05K1/023
摘要： A head suspension supporting a head at the tip end is allowed to swing at the tip end of a carriage in a recording disk drive. A microactuator is interposed between the head suspension and the carriage. A resistor is connected to the microactuator in serial. The microactuator is allowed to function as a capacitance. A combination of the microactuator and the resistor enables establishment of a so-called low pass filter. A high frequency noise involuntarily introduced in the driving voltage for the microactuator can be eliminated or removed from the driving voltage. Elimination of the high frequency noise enables a reliable prevention of the mechanical or physical resonance or vibration in the head suspension. A tracking action of the head related to a target recording track can reliably be stabilized.
摘要翻译：允许在尖端处支撑头部的头悬架在记录盘驱动器中的托架的尖端处摆动。微型致动器插入在头部悬架和托架之间。电阻串联连接到微致动器。允许微致动器用作电容。微致动器和电阻器的组合使得能够建立所谓的低通滤波器。可以从驱动电压中消除或去除微致动器的驱动电压中不自主地引入的高频噪声。消除高频噪声使得可以可靠地防止头部悬架中的机械或物理共振或振动。能够可靠地稳定与目标记录轨道相关的头部的跟踪动作。

3. 发明申请

US20020101693A1 Magnetoresistive effect type of head, manufacturing method of magnetoresistive effect type of head, and information reproducing system 失效
标题翻译：磁阻效应类型的头，磁阻效应类型的头的制造方法和信息再现系统
公开(公告)号：US20020101693A1
公开(公告)日：2002-08-01
申请号：US10007888
申请日：2001-11-13
申请人： FUJITSU LIMITED
发明人： Junichi Hashimoto , Michiaki Kanamine , Takahiro Imamura , Kenichi Aoshima
IPC分类号： G11B005/39
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/3113 , G11B5/3903 , G11B2005/3996
摘要： An object of the present invention is to provide a magnetoresistive effect type of head for preferably reproducing information recorded on a recording medium with high recording density suppressing generation of Barkhausen noise. The magnetoresistive effect type of head has a magnetoresistive effect element offering a resistive change according to intensity of an external magnetic field, for detecting a magnitude of a resistance of the magnetoresistive effect element to detect intensity of a magnetic field. The magnetoresistive effect element consists of a flat multi-layer film in which a free magnetic layer changing in a direction of a magnetization in accordance with the external magnetic field is set up to a lowest layer. The magnetoresistive effect type of head comprises a non-magnetic substrate, an insulating layer contacting with a center portion of a lower surface at a substrate side of said free magnetic layer, a pair of electrode layers for conducting a current through said magnetoresistive effect element, said pair of electrode layers being formed at a position interposing said insulating layer therebetween contacting with both edge portions of the lower surface at the substrate side of said free magnetic layer, and being formed with a same surface height as a surface height of said insulating layer, and a pair of magnetic wall control layers for suppressing a movement of a magnetic wall of said free magnetic layer, said pair of magnetic wall control layers being formed to extend interposing said magnetoresistive effect element therebetween.
摘要翻译：本发明的目的是提供一种用于优选地再现记录在具有抑制巴克豪森噪声产生的高记录密度的记录介质上的信息的磁阻效应类型的磁头。磁阻效应类型的磁头具有根据外部磁场的强度提供电阻变化的磁阻效应元件，用于检测磁阻效应元件的电阻的大小以检测磁场的强度。磁阻效应元件由平坦的多层膜构成，其中沿着外部磁场的磁化方向上的自由磁性层被设置到最低层。磁阻效应型头部包括非磁性基板，与所述自由磁性层的基板侧的下表面的中心部分接触的绝缘层，用于传导通过所述磁阻效应元件的电流的一对电极层，所述一对电极层形成在与所述自由磁性层的基板侧的下表面的两个边缘部分接触的绝缘层之间的位置处，并且形成与所述绝缘层的表面高度相同的表面高度以及用于抑制所述自由磁性层的磁壁的运动的一对磁性壁控制层，所述一对磁性壁控制层形成为在其间插入所述磁阻效应元件。

4. 发明申请

US20040032693A1 Head slider having microactuator 失效
标题翻译：头滑块具有微致动器
公开(公告)号：US20040032693A1
公开(公告)日：2004-02-19
申请号：US10643267
申请日：2003-08-19
申请人： FUJITSU LIMITED
发明人： Takahiro Imamura , Yukihiro Uematsu , Hitoshi Kanai , Shinji Koganezawa , Ryosuke Koishi , Takeaki Shimanouchi
IPC分类号： G11B005/60
CPC分类号： G11B5/5552 , G11B5/6082
摘要： A pair of slits are defined in a slider body of a head slider so as to extend from a trailing end surface to the leading end on the slider body. A movable block is established in the slider body between the slits. The slits ensure the extent of movement for the movable block. Elongated plates enable a relative displacement between the movable block and a stationary block. A head element is mounted on a trailing end surface of the movable block. The thickness of a non-magnetic layer corresponds to the gap length of the head element. The gap length of the head element can easily be controlled based on deposition of the non-magnetic layer. The thickness of the non-magnetic layer can be reduced in a relatively facilitated manner, so that the gap length of the head element can easily be minimized.
摘要翻译：一个狭缝被限定在头部滑动件的滑块体中，以便从滑动件主体的后端表面延伸到前端。在滑块体之间在狭缝之间建立可动块。狭缝确保可移动块的移动程度。细长的板使得可移动块和固定块之间的相对位移。头元件安装在可移动块的后端表面上。非磁性层的厚度对应于头元件的间隙长度。基于非磁性层的沉积可以容易地控制头元件的间隙长度。可以以相对便利的方式减小非磁性层的厚度，使得头元件的间隙长度可以容易地最小化。

5. 发明申请

US20030095361A1 Head slider having piezoelectric actuator 失效
标题翻译：具有压电致动器的头滑块
公开(公告)号：US20030095361A1
公开(公告)日：2003-05-22
申请号：US10101009
申请日：2002-03-19
申请人： FUJITSU LIMITED
发明人： Takeaki Shimanouchi , Ryousuke Koishi , Takahiro Imamura
IPC分类号： G11B005/56
CPC分类号： G11B5/54 , G11B5/6005
摘要： A head slider includes a front rail having an air bearing surface and a step surface lower than the air bearing surface, provided on a disk faced surface in the vicinity of an air inflow end, a transducer provided in the vicinity of an air outflow end, and a groove for generating a negative pressure by expanding air once compressed by the front rail. The head slider further includes a piezoelectric actuator mounted on a head slider back surface on the opposite side of the disk faced surface excluding the vicinity of the air outflow end. By the piezoelectric actuator, the front rail and the neighboring portion are deformed in the direction toward the recording medium or away from the recording medium, and the positive pressure generated at the air bearing surface is regulated, whereby the floating amount of the head slider can be regulated.
摘要翻译：磁头滑块包括设置在空气流入端附近的盘面上的空气轴承表面和比空气轴承表面低的台阶表面的前轨，设置在空气流出端附近的换能器，以及用于通过由前轨压缩而膨胀的空气来产生负压的槽。磁头滑动器还包括安装在除了空气流出端附近的磁盘面对面的相对侧的磁头滑块后表面上的压电致动器。通过压电致动器，前轨和相邻部分在朝向记录介质的方向或远离记录介质的方向上变形，并且调节在空气轴承表面处产生的正压，由此头滑动器的浮动量被监管。

6. 发明申请

US20010008476A1 Method of measuring coefficient of friction and head slider for magnetic medium drive 有权
标题翻译：测量磁介质驱动摩擦系数和磁头滑块的方法
公开(公告)号：US20010008476A1
公开(公告)日：2001-07-19
申请号：US09790098
申请日：2001-02-21
申请人： FUJITSU LIMITED
发明人： Takahiro Imamura
IPC分类号： G11B005/48 , G11B021/16
CPC分类号： G01N19/02 , G11B5/60 , G11B21/16 , G11B33/10
摘要： An adsorptive tangential force is measured at the moment when a slider has contacted or touched a receiving surface. The adsorptive tangential force is induced solely by the adsorption transmitted from the receiving surface to the slider. An overall tangential force transmitted from the receiving surface to the slider is measured when the slider is kept urged against the receiving surface. The coefficient of dynamic friction is calculated based on the differential between the thus measured overall and adsorptive tangential forces. The effect of the adsorption can be eliminated from the calculated coefficient of dynamic friction. It is possible to derive the coefficient of dynamic friction at a still higher accuracy.
摘要翻译：当滑块接触或接触接收表面时，测量吸附切向力。吸附切向力仅通过从接收表面传递到滑块的吸附而诱发。当滑块被保持推靠在接收表面上时，测量从接收表面传递到滑块的整体切向力。基于由此测量的整体和吸附切向力之间的差异来计算动摩擦系数。可以从计算的动摩擦系数中消除吸附的影响。可以以更高的精度导出动摩擦系数。

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