Abstract
We studied the read/write characteristics of a high-density longitudinal recording system at more than 40 Gb/in2. For accurate design of a recording system with high track density, we introduced noise/signal ratio by unit read track width as a parameter. This method was employed in the design of a 40 Gb/in2 recording system.Based on the design parameters, we fabricated CoCrPtX media with a layer structure optimized for low noise and thermal stability. A narrow shield Spin-Valve (SV) GMR head was also fabricated to achieve high linear recording density. System tests registered a density of 39.8 Gb/in2.After, we improved the media and the head, 53 Gb/in2 was demonstrated.
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