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High areal density recording using an MR/inductive head and pre-embossed rigid magnetic disk

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5 Author(s)
Yada, H. ; Corp. Res. Labs., Sony Corp., Tokyo, Japan ; Yamakoshi, T. ; Takino, H. ; Okada, K.
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To determine whether a newly developed PERM (Pre-Embossed Rigid Magnetic) disk can be used with an MB/inductive head and a PRML (Partial-Response Maximum-Likelihood) channel, an experimental digital magnetic recording system was developed. This system used an external clocking scheme instead of a conventional self-clocking scheme. The track pitch was 5.2 μm, and the track width was 3.6 μm. Basic read-write characteristics, such as signal-to-noise ratio, frequency response, positive/negative symmetry or the readback pulse, were measured. An areal density of 605 kbit/mm2 (390 Mbit/inch2) was obtained at a bit error rate of 10-6

Published in:

Magnetics, IEEE Transactions on  (Volume:30 ,  Issue: 2 )

Date of Publication:

Mar 1994

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