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A dynamic two-degree-of-freedom contact with friction model of the head-disk interface (HDI) is presented accounting for slider thermal protrusion and its influence on the HDI dynamics. Using this model, which includes roughness, the applied power to the thermal protrusion is calculated that leads to minimum flying-height modulations. The model predictions are verified by drive-level experimental...
To achieve extremely high-density magnetic recording of 1 Tbit per square inch using conventional technologies, the distance between the recording slider and the rotating disk needs to be less than 5 nm. For successful operation, disk and slider surfaces must also be extremely smooth with root-mean-square roughness values of few angstroms. However, ultra-low flying super smooth head-disk interfaces...
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