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    • 8. 发明授权
    • Magnetic media with randomly positioned texturing features
    • 具有随机定位纹理特征的磁性介质
    • US06404590B1
    • 2002-06-11
    • US09381365
    • 2000-01-06
    • David S. KuoBruno MarchonWei H. Yao
    • David S. KuoBruno MarchonWei H. Yao
    • G11B566
    • G11B5/84B23K26/0823G11B5/6011G11B5/74G11B5/82G11B5/8404G11B17/32
    • A magnetic data storage medium includes a dedicated transducing head contact zone for engaging an air bearing slider, primarily when the disk is stationary. The contact zone is textured with an irregular sequence of spaced apart nodules forming a substantially circumferential, spiral path. The spiral path includes multiple terms that define a uniform radial pitch. The circumferential pitch is irregular, more preferably determined according to pseudo-random function in which the actual spacing intervals vary about a nominal interval, over a range comparable to, but generally less than, the interval. The pseudo-random array can be formed by a texturing process that includes directing a focused laser beam onto the contact zone. The disk is rotated to maintain a constant circumferential speed relative to the laser, and also is translated radially to provide the desired radial pitch. The laser is operated in a continuous wave mode, with an acousto-optic modulator between the laser and disk operated to provide a pseudo-random variance in time intervals between successive laser exposures.
    • 磁数据存储介质包括用于接合空气轴承滑块的专用换能头接触区,主要是当盘静止时。 接触区域具有形成基本上圆周的螺旋路径的间隔开的结节的不规则序列。 螺旋路径包括限定均匀径向间距的多个项。 圆周间距是不规则的,更优选地根据伪随机函数来确定,其中实际间隔间隔在标称间隔上变化,在与该间隔相当但通常小于该间隔的范围内。 伪随机阵列可以通过纹理化处理形成,其包括将聚焦的激光束引导到接触区上。 盘旋转以相对于激光器保持恒定的圆周速度,并且还被径向平移以提供期望的径向间距。 激光器以连续波模式操作,激光和光盘之间的声光调制器被操作以在连续激光曝光之间的时间间隔中提供伪随机方差。