Engineered interface for low fly height

Stock material or miscellaneous articles – Magnetic recording component or stock – Magnetic recording media substrate

Reexamination Certificate

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Reexamination Certificate

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07052786

ABSTRACT:
A magnetic disk having a low surface microwaviness at a scale of about 200 microns and higher, and a high surface roughness at a scale of less than about a length of a pad of a slider for writing to the disk.

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Hara, Seiichiro, et al. “Influence of Disk Macro-Waveiness Component on Amplitude Modulation of Head Readout Signal”, Journal of the Japan Society of Precision Engineers, vol. 67, Issue No. 6, Jun. 2001.
Zhang, B., et al. “Possibility of Surface Force Effect in Slider Air Bearings of 100 Gbit/in2Hard Disks”, Tribology International, vol. 36, 2003.
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Marchon, B., “Glide Avalanche Prediction From Surface Topography”, Transactions of the ASME, vol. 118, Jul. 1996.

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