Analysis of Shingle-Write Readback Using Magnetic-Force Microscopy
Analysis of Shingle-Write Readback Using Magnetic-Force Microscopy
复制标题
使用磁力显微镜分析叠式写入读回
DOI：
10.1109/tmag.2009.2038281
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发表时间：
2010
影响因子：
2.1
通讯作者：
R. Wood
中科院分区：
文献类型：
--
作者：
F. Lim;B. Wilson;R. Wood
叠瓦记录实验是在使用传统记录组件的精密旋转支架上进行的。尽管磁头和介质均对应 250 Gb/in2（千兆位/平方英寸）产品，但原始写入密度已超过 1 Tb/in2（太比特/平方英寸）。使用高分辨率磁力显微镜（MFM）来检查由此产生的书写图案。 MFM 图像的表观分辨率低至 16 nm。从这些图像中，我们能够表征二维直至最高密度的信号和噪声。对从这些 MFM 图像中恢复的“波形”进行了二维信号处理。在最高写入密度下，会遇到非常低的原始错误率，并且只能通过采用相对较低速率的代码才能成功恢复客户数据。尽管实验将原始记录密度推至 1039 Gb/in2，但成功恢复数据的最高客户信息密度为 623 Gb/in2。
Shingle recording experiments were conducted on a precision spin-stand using conventional recording components. Although both head and medium correspond to a 250 Gb/in2 (Gigabits/sq. inch) product, the raw written densities were pushed beyond 1 Tb/in2 (Terabits/sq. inch). High-resolution Magnetic-force microscopy (MFM) was used to examine the resulting written patterns. The MFM images have an apparent resolution down to 16 nm. From these images we are able to characterize the signal and noise in two dimensions up to the highest densities. Two-dimensional signal-processing was applied to the "waveforms" recovered from these MFM images. At the highest written densities, very poor raw error-rates were encountered and customer data could only be recovered successfully by employing relatively low rate codes. Although the experiments pushed the raw recording density to 1039 Gb/in2, the highest customer information density at which data was successfully recovered was 623 Gb/in2.