Experimental results for frequency response and halfpulse width of digital recording signals have been obtained for submicrometer transducer spacings, for the case of a flexible disk flying in close proximity to a rigidly mounted conventional ferrite recording head. Using optical flying heights rather than an “effective spacing,” together with a modification of the Williams-Comstock write-process slope criterion, we have obtained excellent agreement between experimental results and theoretical predictions. This suggests that the notion of effective spacing can be avoided.
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