利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

27 条记录 (耗时 0.018 秒)

    Magnetic disk drive having a function for using a thermal protrusion amount for flying height management and an inspection device having such a function
    2.
    发明授权
    Magnetic disk drive having a function for using a thermal protrusion amount for flying height management and an inspection device having such a function 失效
    具有使用用于飞行高度管理的热突起量的功能的磁盘驱动器和具有这种功能的检查装置

    公开(公告)号：US07330324B2

    公开(公告)日：2008-02-12

    申请号：US10890073

    申请日：2004-07-12

    申请人： Akira Morinaga ,  Yoji Maruyama ,  Hiroshi Ide ,  Norifumi Miyamoto

    发明人： Akira Morinaga ,  Yoji Maruyama ,  Hiroshi Ide ,  Norifumi Miyamoto

    IPC分类号： G11B5/02

    CPC分类号： G11B5/6005 ,  G11B5/3136 ,  G11B5/607

    摘要： A write head's material having a great thermal expansion coefficient expands due to Joule heat resulting from a write current and a temperature rise dependent on high-frequency core loss, thereby causing the head's flying surface to protrude toward a magnetic disk. This phenomenon is called TPR (thermal protrusion). It is essential that the flying height be accurately determined and managed in consideration of TPR. A magnetic disk drive for actual use or a magnetic disk drive that is in a testing process but similar to the one for actual use is used to measure TPR amount changes resulting from a write operation, store the resulting measured data in a memory or on the magnetic disk, and perform flying height management with the stored measured data. Further, flying height management is performed as needed in conjunction with a SMART function. The present invention makes it possible to perform high-reliability flying height management.

    摘要翻译： 具有大的热膨胀系数的写头材料由于写入电流引起的焦耳热和依赖于高频磁芯损耗的温度升高而扩大，从而使磁头的飞行表面朝向磁盘突出。 这种现象称为TPR（热突起）。 考虑到TPR，飞行高度必须准确确定和管​​理至关重要。 用于实际使用的磁盘驱动器或处于测试过程中但类似于实际使用的磁盘驱动器用于测量由写入操作导致的TPR量变化，将得到的测量数据存储在存储器中或在 磁盘，并使用存储的测量数据执行飞行高度管理。 此外，根据需要结合SMART功能执行飞行高度管理。 本发明能够进行高可靠性的飞行高度管理。

    Optical recording and reproducing device
    4.
    发明授权
    Optical recording and reproducing device 失效
    光学记录和再现设备

    公开(公告)号：US4811328A

    公开(公告)日：1989-03-07

    申请号：US803611

    申请日：1985-12-02

    申请人： Tetsuo Ito ,  Hiroshi Sasaki ,  Yoshio Sato ,  Satoshi Shimada ,  Norifumi Miyamoto ,  Nobuyoshi Tsuboi ,  Hideki Nihei ,  Hiroaki Koyanagi

    发明人： Tetsuo Ito ,  Hiroshi Sasaki ,  Yoshio Sato ,  Satoshi Shimada ,  Norifumi Miyamoto ,  Nobuyoshi Tsuboi ,  Hideki Nihei ,  Hiroaki Koyanagi

    IPC分类号： G11B7/00 ,  G11B7/0055 ,  G11B7/125 ,  G11B7/135 ,  G11B7/30

    CPC分类号： G11B7/1395

    摘要： A laser light flux is divided and synthesized so that its light intensity distribution is changed from a Gaussian distribution to a non-Gaussian distribution. When a laser light flux having a Gaussian distribution is irradiated onto a dividing prism, it is divided into a left part and a right part which are refracted right and left inversely from each other. When the right and left parts are incident on a synthesizing prism, they are refracted again and travel to be overlapped with each other on a recording medium. The light intensity distribution on a segment at the apex of the synthesizing prism is weaker at the central part and stronger at the peripheral part. This is because the light fluxes resulting from the division are inverted in their position so that the central part of the Gaussian distribution is separated left and right while the peripheral part with a weaker light intensity is centered.

    摘要翻译： 激光光束被分割和合成，使其光强分布从高斯分布变为非高斯分布。 当具有高斯分布的激光束被照射到分割棱镜上时，它被分成左右折射，左右折射。 当左右部分入射到合成棱镜上时，它们被再次折射并在记录介质上相互重叠。 合成棱镜顶点的光束强度分布在中心部分较弱，周边部分强度分布较强。 这是因为由分割产生的光束在其位置反转，使得高斯分布的中心部分左右分离，而具有较弱光强度的周边部分居中。

    Magnetic head tester and method of manufacturing magnetic disk drive
    7.
    发明申请
    Magnetic head tester and method of manufacturing magnetic disk drive 失效
    磁头测试仪和制造磁盘驱动器的方法

    公开(公告)号：US20070046286A1

    公开(公告)日：2007-03-01

    申请号：US11515268

    申请日：2006-09-01

    申请人： Hiroshi Umezaki ,  Norifumi Miyamoto ,  Kazuhiko Washizu ,  Takehiko Hamaguchi ,  Kenji Itoh

    发明人： Hiroshi Umezaki ,  Norifumi Miyamoto ,  Kazuhiko Washizu ,  Takehiko Hamaguchi ,  Kenji Itoh

    IPC分类号： G01R33/12

    CPC分类号： G11B5/012 ,  G11B5/455 ,  G11B5/4555 ,  G11B2005/001

    摘要： Embodiments of the invention provide an inexpensive magnetic head tester employing component parts of a production HDD and capable of exercising functions very close to those of a production HDD. In one embodiment, a magnetic head tester employs the VCM actuator and the control circuit of a production HDD and has a lightweight, simple HGA fixing mechanism mounted on an actuator arm. The HGA fixing mechanism fixes an HGA to the actuator arm by a method using a very light holding spring mounted on the arm, a method of mechanically clamping an HGA by using air pressure, or a method of fixing an HGA to the arm by elastically deforming a rubber clamping member by air pressure. Servo control is achieved by the actuator of a production VCM. An end part of the VCM actuator is stopped by a stopping mechanism and is held by a holding spring to prevent the runaway of the VCM actuator. Servo control is performed by balancing the driving force of the VCM and the resilience of the spring.

    摘要翻译： 本发明的实施例提供了一种廉价的磁头测试仪，其使用生产HDD的组件并且能够执行与生产HDD的功能非常接近的功能。 在一个实施例中，磁头测试仪使用VCM致动器和制造HDD的控制电路，并且具有安装在致动器臂上的重量轻，简单的HGA固定机构。 HGA固定机构通过使用安装在臂上的非常轻的保持弹簧的方法将HGA固定到致动器臂，使用空气压力机械地夹持HGA的方法，或通过弹性变形将HGA固定到臂的方法 通过空气压力的橡胶夹紧构件。 通过生产VCM的执行器实现伺服控制。 VCM致动器的端部由止动机构阻止，并由保持弹簧保持，以防止VCM致动器的失控。 通过平衡VCM的驱动力和弹簧的弹性来进行伺服控制。