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1. 发明授权

US08711499B1 Methods for measuring media performance associated with adjacent track interference 有权
标题翻译：用于测量与相邻轨道干扰相关的介质性能的方法
公开(公告)号：US08711499B1
公开(公告)日：2014-04-29
申请号：US13045416
申请日：2011-03-10
申请人： Mrugesh Desai , Harold H. Gee , Mark A. Nichols
发明人： Mrugesh Desai , Harold H. Gee , Mark A. Nichols
IPC分类号： G11B27/36
CPC分类号： G11B27/36 , G11B20/10453 , G11B2220/2516
摘要： Methods for measuring media performance associated with adjacent track interference are provided. One such method includes iteratively writing data to a target track for each of a plurality of n frequencies, measuring a first signal amplitude and a first noise for each of the n sectors on the target track, writing an aggressor track pattern proximate the target track, measuring a second signal amplitude and a second noise for each of the n sectors on the target track, calculating a weighted sum for each of the signal amplitude measurements for each of the plurality of n frequencies, and calculating a weighted sum for each of the noise measurements for each of the plurality of n frequencies, and repeating the writing the aggressor track pattern, the measuring the second signal amplitude and the second noise, and calculating the weighted sums for preselected numbers of times.
摘要翻译：提供了测量与相邻轨道干扰相关的介质性能的方法。一种这样的方法包括向多个n个频率中的每一个迭代地向目标轨道写入数据，测量目标轨道上的n个扇区中的每一个的第一信号幅度和第一噪声，在目标轨道附近写入攻击者轨迹，测量所述目标轨道上的所述n个扇区中的每一个的第二信号幅度和第二噪声，针对所述多个n个频率中的每一个为每个所述信号幅度测量计算加权和，并且计算每个所述噪声的加权和测量多个n个频率中的每一个，并重复写入侵略者轨迹图案，测量第二信号幅度和第二噪声，以及计算预选次数的加权和。

2. 发明授权

US08125723B1 Predictive characterization of adjacent track erasure in recording media 有权
标题翻译：记录介质中相邻轨道擦除的预测表征
公开(公告)号：US08125723B1
公开(公告)日：2012-02-28
申请号：US12718927
申请日：2010-03-05
申请人： Mark A. Nichols , Harold H. Gee , Eric Roddick , Mrugesh Desai
发明人： Mark A. Nichols , Harold H. Gee , Eric Roddick , Mrugesh Desai
IPC分类号： G11B27/36 , G11B5/03
CPC分类号： G11B5/09 , G11B5/012 , G11B5/024 , G11B20/1816 , G11B20/22 , G11B2020/10851 , G11B2020/1869 , G11B2220/2516
摘要： Cross-track density capability is predicted for a large number of writes based on a plurality of erase band width measurements. Over the plurality of erase band width measurements, a number of writes in a series of writes performed as part of an aggressing track sequence is varied. A model of the magnetic track width (MTW) as function of the number of writes employed in the MTW measurements may be generated and an estimate of the erase band width for a large number of writes derived from the model as a prediction of cross-track density capability.
摘要翻译：基于多个擦除带宽测量，对于大量写入来预测跨轨道密度能力。在多个擦除带宽测量中，作为侵略轨迹序列的一部分执行的一系列写入中的多个写入被改变。可以产生作为在MTW测量中使用的写入数目的函数的磁道宽度（MTW）的模型，并且从模型导出的大量写入的擦除带宽的估计作为交叉轨道的预测密度能力。

3. 发明申请

US20120251846A1 RECORDING MEDIA WITH MULTIPLE EXCHANGE COUPLED MAGNETIC LAYERS 有权
标题翻译：具有多个交换耦合磁性层的记录媒体
公开(公告)号：US20120251846A1
公开(公告)日：2012-10-04
申请号：US13077419
申请日：2011-03-31
申请人： Mrugesh Desai , Kyongha Kang , Jian Zhou , B. Ramamurthy Acharya
发明人： Mrugesh Desai , Kyongha Kang , Jian Zhou , B. Ramamurthy Acharya
IPC分类号： G11B5/66 , G11B5/673
CPC分类号： G11B5/66 , G11B5/65
摘要： A magnetic recording (PMR) disk structure is described. The PMR disk structure may include a magnetic capping layer being substantially free of an oxide, an upper magnetic layer with an oxide content disposed directly below and in contact with the magnetic capping layer, and an upper exchange coupling layer disposed below the upper magnetic layer.
摘要翻译：描述磁记录（PMR）盘结构。 PMR盘结构可以包括基本上不含氧化物的磁性覆盖层，具有氧化物含量的上部磁性层直接设置在磁性覆盖层的下方并与之接触，以及设置在上部磁性层下方的上部交换耦合层。

4. 发明授权

US09028985B2 Recording media with multiple exchange coupled magnetic layers 有权
标题翻译：用多个交换耦合磁性层记录介质
公开(公告)号：US09028985B2
公开(公告)日：2015-05-12
申请号：US13077419
申请日：2011-03-31
申请人： Mrugesh Desai , Kyongha Kang , Jian Zhou , B. Ramamurthy Acharya
发明人： Mrugesh Desai , Kyongha Kang , Jian Zhou , B. Ramamurthy Acharya
IPC分类号： G11B5/673 , G11B5/66 , G11B5/65
CPC分类号： G11B5/66 , G11B5/65
摘要： A magnetic recording (PMR) disk structure is described. The PMR disk structure may include a magnetic capping layer being substantially free of an oxide, an upper magnetic layer with an oxide content disposed directly below and in contact with the magnetic capping layer, and an upper exchange coupling layer disposed below the upper magnetic layer.
摘要翻译：描述磁记录（PMR）盘结构。 PMR盘结构可以包括基本上不含氧化物的磁性覆盖层，具有氧化物含量的上部磁性层直接设置在磁性覆盖层的下方并与之接触，以及设置在上部磁性层下方的上部交换耦合层。

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