Abstract:Reliable digital storage at linear densities as high as 20 000 bits per inch has resulted from an investigation establishing means of providing optimum recording and reproducing resolution. High linear densities make greater lateral densities practical by reducing interference between tracks. High lateral densities have been demonstrated: 1000 tracks per inch with special head structures, and 4000 tracks per inch with selective-erasure techniques. An area density as high as 32 million bits per square inch has … Show more
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