A concept of a submicron width multi-track head for ultra high track density perpendicular magnetic recording is discussed. Very narrow track of 0.4μm in width is confirmed, judging from a measurement with a magnetic force microscopy. The head configuration for multi-track high areal density recording has been proposed, which consists of submicron-trackwidth write-heads and a high resolution wide-track read-head. C/N ratio of low density signal exceeds 30 dB. D50 is 100 kFRPI; high linear density of perpendicular magnetic recording is not degraded in this scheme. Areal density of 6 Gbit/inch2 is demonstrated, and the potential for 13 Gbit/inch2 is suggested.
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Nakamura et al. (1994) studied this question.
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