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公开(公告)号：US06580572B1
公开(公告)日：2003-06-17
申请号：US09737388
申请日：2000-12-14
IPC分类号： G11B502
CPC分类号： G11B5/6005 , G11B5/3169 , G11B5/455 , G11B27/36 , G11B2220/20
摘要： A combination glide test/burnishing head can be utilized in a glide test/burnishing system. The combination glide test/burnishing head includes two piezo-electric elements, which can be utilized in a passive mode as sensors for detecting contacts between the glide test/burnishing head and asperities on the surface of a magnetic recording disc. Contact between the glide test/burnishing head and disc asperities results in generation of a defect detection signal, which can be utilized by associated test logic to define the location of the detected asperities on the disc surface. The piezo-electric elements of the glide test/burnishing head can also be utilized in an active mode to cause yaw variation in the flight attitude of the glide test/burnishing head, in turn causing a burnishing pad on the glide test/burnishing head to be moved radially into contact with a detected disc asperity. Once an active, burnishing operation has been performed, the piezo-electric elements of the glide test/burnishing head are returned to passive mode, to determine if the burnishing operation was successful in removing the asperity on the disc surface. Combining the glide test and burnishing functions in a common head assembly allows the glide test and burnishing functions to be performed using a single actuator for the glide test/burnishing head, simplifying and reducing the cost of a glide test/burnishing system.
摘要翻译： 组合滑行试验/抛光头可用于滑移试验/抛光系统。 组合滑行测试/抛光头包括两个压电元件，其可以被动模式用作用于检测滑动测试/抛光头与磁记录盘表面上的凹凸之间的接触的传感器。 滑动测试/抛光头和盘形凹凸之间的接触导致产生缺陷检测信号，该缺陷检测信号可由相关联的测试逻辑用来定义检测到的凹凸在盘表面上的位置。 滑行试验/抛光头的压电元件也可以以主动模式使用，以使滑行试验/抛光头的飞行姿态产生偏航变化，从而在滑动试验/抛光头上造成抛光垫 径向移动以与检测到的圆盘凹凸接触。 一旦执行了主动的抛光操作，滑动测试/抛光头的压电元件返回到被动模式，以确定抛光操作是否成功地去除了盘表面上的凹凸。 将滑动试验和抛光功能结合在共同的头部组件中，允许使用用于滑动试验/抛光头的单个致动器来执行滑行试验和抛光功能，从而简化和降低滑动试验/抛光系统的成本。
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12.发明授权Method and apparatus for calibrating a glide head and detection system for a magnetic disk drive 失效用于校准滑动头的方法和装置以及用于磁盘驱动器的检测系统
公开(公告)号：US6142006A
公开(公告)日：2000-11-07
申请号：US121595
申请日：1998-07-24
CPC分类号： G01N29/2418 , G11B21/21 , G11B33/10 , G01N2291/014
摘要： A method and apparatus for calibrating a glide head and detector system performs a pre-screening to ensure the quality of the glide head and the piezoelectric sensor in the detection system. The glide head and the piezoelectric sensor detect a signal when the glide head makes contact with the disk, such as a magnetic recording disk. Calibration of the detection system utilizes a specially made bump disk that has asperities of desired height and size that protrude out of a flat disk surface. The glide head is flown over the bump disk, and by gradually reducing the disk spinning velocity, the head is brought closer to the disk and eventually into contact with the asperity. The onset of contact, as detected by the piezoelectric sensor, defines a disk spinning velocity for the head to fly at the desired height. In order to decouple the glide head flying characteristics and the piezoelectric quality and transfer function from other factors that affect the calibration of the detection system, laser pulses are directed at the glide head. Head vibrations are introduced in the glide head and detected by the piezoelectric sensor. The head excitations are recorded as a spectrogram in which the resonance frequencies are observed. From the amplitude and frequency readings, head resonance frequencies are identified and the piezoelectric sensor response is characterized. This allows the pre-screening of the head/sensor system and the decoupling of the glide head flying characteristics and the piezoelectric sensor quality from the asperity integrity effects on the calibration of the detection system.
摘要翻译： 用于校准滑行头和检测器系统的方法和装置进行预筛选以确保检测系统中的滑动头和压电传感器的质量。 滑动头和压电传感器在滑动头与磁盘（例如磁记录盘）接触时检测信号。 检测系统的校准使用特别制造的凸起盘，其具有从平坦盘表面突出的期望的高度和尺寸的粗糙度。 滑动头在凸块上方飞行，通过逐渐减小磁盘旋转速度，磁头更接近磁盘并最终与凹凸接触。 由压电传感器检测到的接触开始限定了磁头旋转速度以使头部以期望的高度飞行。 为了从其他影响检测系统校准的因素中去除滑行头的飞行特性和压电质量和传递函数，激光脉冲指向滑行头。 头部振动被引入到滑动头中并由压电传感器检测。 磁头激励被记录为其中观察到共振频率的频谱图。 从振幅和频率读数，识别头部谐振频率，并表征压电传感器响应。 这允许头部/传感器系统的预筛选和滑翔头飞行特性和压电传感器质量的去耦从对检测系统的校准的粗糙度完整性影响。
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公开(公告)号：US6003364A
公开(公告)日：1999-12-21
申请号：US145681
申请日：1998-09-02
申请人： Wei Hsin Yao , Ramesh Sundaram
发明人： Wei Hsin Yao , Ramesh Sundaram
CPC分类号： G01B13/22 , G11B23/0028 , G11B5/84 , G11B5/8408 , G11B33/10
摘要： An improved glide head is useful for testing the glide quality of a disc. The glide head includes an air bearing surface, pads extending from the air bearing surface and a contact sensor, the contact sensor providing an output in response to an impact on the pad. The air-bearing surface defines a resting plane. The pad protrudes from the air-bearing surface such that the pad projects below the resting plane of the air-bearing surface.
摘要翻译： 改进的滑行头可用于测试光盘的滑动质量。 滑行头包括空气轴承表面，从空气轴承表面延伸的焊盘和接触传感器，接触传感器响应于对焊盘的冲击而提供输出。 空气轴承表面限定了一个静止平面。 垫从空气轴承表面突出，使得垫突出到空气轴承表面的静止平面下方。
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公开(公告)号：US06519114B1
公开(公告)日：2003-02-11
申请号：US09272786
申请日：1999-03-19
申请人： Li-Ping Wang , David Shiao-Min Kuo , Wei Hsin Yao
发明人： Li-Ping Wang , David Shiao-Min Kuo , Wei Hsin Yao
IPC分类号： G11B584
CPC分类号： G11B5/855 , G11B5/6005
摘要： A storage medium is provided that includes a texture zone having a plurality of protrusions. Each of the protrusions is separated by a short circumferential pitch. Alternatively, the texture zone includes a plurality of protrusions with a circumferential pitch less than the diameter of any protrusion. The resonance excitation between the magnetic head and the storage medium in the data storage system is reduced by forming the texture zone with the protrusions that cause the excitation frequencies of the data storage system to shift away from its resonance frequencies.
摘要翻译： 提供一种存储介质，其包括具有多个突起的纹理区域。 每个突起被短的圆周间距分开。 或者，纹理区域包括具有小于任何突起的直径的周向间距的多个突起。 数据存储系统中的磁头和存储介质之间的共振激励通过用引起数据存储系统的激发频率偏离谐振频率的突起形成纹理区而减小。
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公开(公告)号：US6021666A
公开(公告)日：2000-02-08
申请号：US145125
申请日：1998-09-01
摘要： A method of determining the close point for a glide head includes measuring the fly height of at least three positions remove from the selected close point position. The three selected positions are curve-fitted and extrapolated so as to obtain the height at the selected close point. Adaptions are made where the glide head can roll and measurements can be taken at locations transversely across the head.
摘要翻译： 确定滑行头的接近点的方法包括测量从所选择的近点位置移除的至少三个位置的飞行高度。 三个选定的位置进行曲线拟合和外插，以获得所选接近点处的高度。 在滑行头可以滚动的地方进行修改，并且可以在横过头部的位置进行测量。
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