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    • 5. 发明授权
    • System and method for adjusting head-to-disk spacing in a disk drive
    • 用于调整磁盘驱动器中磁盘间距的系统和方法
    • US07310195B1
    • 2007-12-18
    • US11101113
    • 2005-04-07
    • Erhard SchreckFrancis P. CrimiAndrew LeFebvreDuc BanhThao Anh NguyenBrian StromBruce C. Schardt
    • Erhard SchreckFrancis P. CrimiAndrew LeFebvreDuc BanhThao Anh NguyenBrian StromBruce C. Schardt
    • G11B21/02G11B5/596G11B5/58
    • G11B5/6005
    • A disk drive includes a drive housing, a storage disk, a slider and a drive circuitry. The storage disk has an inner and an outer diameter. The slider includes a read/write head and a slider mover that receives power from the drive circuitry to position the read/write head at a predetermined head-to-disk spacing during radial movement of the slider relative to the storage disk. The drive circuitry can direct a varying level of power to the slider mover during radial movement of the slider. In addition, the drive circuitry can increase the power to the slider mover as the read/write head nears a target track in order to decrease the head-to-disk spacing at the appropriate time. The drive circuitry can adjust the power to the slider mover so that the head-to-disk spacing remains within a predetermined range as the slider moves radially relative to the storage disk. The drive circuitry can also direct power to the slider mover so that the head-to-disk spacing is substantially the same at the start of a seek operation and when the read/write head arrives at a target track. The drive circuitry can also direct power to the slider mover based at least partially on the temperature of a portion of the slider.
    • 磁盘驱动器包括驱动器壳体,存储盘,滑块和驱动电路。 存储盘具有内径和外径。 滑动器包括读/写头和滑块移动器,其在驱动器相对于存储盘的径向移动期间从驱动电路接收功率以将读/写头定位在预定的头到盘间隔。 驱动电路可以在滑块的径向运动期间将变化的功率级别引导到滑块移动器。 此外,当读/写头靠近目标轨道时,驱动电路可以增加滑块移动器的功率,以便在适当的时间减小头对盘间距。 驱动电路可以调节滑块移动器的功率,使得当滑块相对于存储盘径向移动时,磁头到磁盘间隔保持在预定范围内。 驱动电路还可以将电力引导到滑块移动器,使得在寻道操作开始时和当读/写头到达目标轨道时,磁头到磁盘的间距基本相同。 驱动电路还可以至少部分地基于滑块的一部分的温度将功率引导到滑块移动器。
    • 6. 发明授权
    • Magnetic disk stack having laser-bump identifiers on magnetic disks
    • 磁盘堆在磁盘上具有激光凸点标识符
    • US6118632A
    • 2000-09-12
    • US800097
    • 1997-02-12
    • Thomas Robert AlbrechtPeter Michael BaumgartThao Anh NguyenKurt Allen RubinAndrew Ching Tam
    • Thomas Robert AlbrechtPeter Michael BaumgartThao Anh NguyenKurt Allen RubinAndrew Ching Tam
    • G11B5/00G11B5/012G11B5/016G11B5/09G11B5/65G11B5/73G11B5/738G11B5/82G11B5/84G11B11/10G11B13/00G11B20/10G11B27/11G11B27/24
    • G11B5/012G11B27/11G11B27/24G11B5/82G11B2005/001G11B2220/20G11B2220/65
    • A magnetic disk with nonmagnetic information encoded under, in or above the magnetic layer of the disk is described along with the disk drive using the magnetic disks. The information may be stored as a series of laser-written marks (e.g., bumps, oxidized spots or spots with altered reflectivity) upon the surface(s) of each disk of the disk stack. The set of marks may be a series of laser bumps which serve a dual purpose as a landing zone or contact start/stop (CSS) zone for the slider and as encoded identifying information. During the manufacturing process for disk drives containing the disks, each disk's identifier can be read using outboard equipment such as an HRF tester or by means contained in the drive itself. Each disk identifier can then be stored magnetically in a special region of the hard disk reserved for use by the drive and/or within the flash memory of the hard drive. The drive can then communicate the identifier(s) to a host computer using the conventional communication hardware and firmware. In this way selected information such as the origin, batch number, date of manufacture, serial number, etc. of any disk can be obtained when needed as, for example, as part of failure analysis.
    • 与使用磁盘的磁盘驱动器一起描述在磁盘的磁性层下面或上方编码的具有非磁性信息的磁盘。 信息可以作为一系列激光写入的标记(例如,具有改变的反射率的凸起,氧化点或斑点)存储在盘堆叠的每个盘的表面上。 该组标记可以是一系列激光凸块,其作为滑块的着陆区域或接触开始/停止(CSS)区域和作为编码的识别信息的双重目的。 在包含磁盘的磁盘驱动器的制造过程中,可以使用诸如HRF测试仪之类的外部设备或驱动器本身包含的方式读取每个磁盘的标识符。 然后可以将磁盘的每个标识符磁性地存储在硬盘的特殊区域中,以供驱动器使用和/或在硬盘驱动器的闪存中使用。 然后,驱动器可以使用传统的通信硬件和固件将标识符传送到主计算机。 以这种方式,当需要时,例如作为故障分析的一部分,可以获得任何盘的原点,批号,制造日期,序列号等所选择的信息。
    • 10. 发明授权
    • Calibration disk with disk bumps for calibrating PZT sliders
    • 校准盘,用于校准PZT滑块
    • US5689057A
    • 1997-11-18
    • US607753
    • 1996-02-27
    • Peter Michael BaumgartKarl A. FlechsigMichael Franklin LeeWing P. LeungUllal Vasant NayakThao Anh NguyenTimothy Christopher O'SullivanAndrew Ching Tam
    • Peter Michael BaumgartKarl A. FlechsigMichael Franklin LeeWing P. LeungUllal Vasant NayakThao Anh NguyenTimothy Christopher O'SullivanAndrew Ching Tam
    • B23K26/08G11B5/82G11B5/84G11B7/00G11B7/08G11B33/10G01B5/28
    • B82Y15/00B23K26/0823B82Y10/00G11B33/10G11B5/82G11B5/8404G11B5/8408Y10T29/49995
    • Crater shaped bumps are made on a calibration disk which can be used for calibrating a PZT slider, the PZT slider in turn being used for detecting predetermined asperities on a production run magnetic disk. The crater shaped bumps emulate predetermined asperities of production run magnetic disks and especially asperities which are undesirable and would cause the production run disk to be discarded after testing by the PZT slider. Crater shaped bumps which emulate undesirable asperities on current production runs of magnetic disks have a diameter in the range of 10 to 25 .mu.m and a peripheral ridge with a height h.sub.r above a nominal surface of the calibration disk in the range of 75 to 120 nm. Close tolerance crater shaped bumps with this configuration can be made by impinging two or more pulses of laser energy on the same location of a calibration disk. By increasing the number of pulses the height of the peripheral ridge progressively increases. By employing multiple pulses, the height of the peripheral ridge is increased while the diameter of the crater shaped bump stays substantially constant. Further, by employing multiple pulses diameters and heights of crater shaped bumps can be produced with close tolerances within a diameter range of 5 to 20 .mu.m and a height range of 2 to 120 nm. Different arrangements of the crater shaped bumps on a calibration disk are provided for increasing the range of calibration of the PZT slider.
    • 在可用于校准PZT滑块的校准盘上形成火山口形凸块,PZT滑块又用于检测生产运行磁盘上的预定凹凸。 火山口形凸起模拟生产运行磁盘的预定粗糙度,特别是不期望的粗糙度,并且会在PZT滑块测试后导致生产运行盘被丢弃。 在当前的磁盘生产运行中模拟不期望的粗糙度的火山口形凸起具有在10至25μm的范围内的直径和在校准盘的标称表面上的高度hr在75至120nm范围内的周边脊 。 可以通过在校准盘的相同位置上照射激光能量的两个或更多个脉冲来实现具有该配置的紧公差凹坑形状的凸块。 通过增加脉冲数,周边脊的高度逐渐增加。 通过采用多个脉冲,周边脊的高度增加,而凹坑形凸起的直径基本保持不变。 此外,通过使用多个脉冲,可以在5〜20μm的直径范围内和2〜120nm的高度范围内产生具有紧密公差的凹坑形凸起的高度。 提供校准盘上的凹坑形突起的不同布置,用于增加PZT滑块的校准范围。