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

Author

Yada, Hiroaki ; Yamakoshi, Takamichi ; Takino, Hiroshi ; Okada, Kanzo ; Takeda, Toru

Author_Institution

Corp. Res. Labs., Sony Corp., Tokyo, Japan

Volume

30

Issue

2

fYear

1994

fDate

3/1/1994 12:00:00 AM

Firstpage

404

Lastpage

409

Abstract

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

Keywords

error statistics; frequency response; hard discs; magnetic heads; magnetic recording; magnetoresistive devices; 3.6 micron; 5.2 micron; BER; CoPt; MR/inductive head; PRML channel; SNR; bit error rate; digital magnetic recording system; external clocking scheme; frequency response; high areal density recording; magnetoresistive/inductive head; partial-response maximum-likelihood; positive/negative symmetry; pre-embossed rigid magnetic disk; read-write characteristics; readback pulse; signal-to-noise ratio; Bit error rate; Clocks; Digital magnetic recording; Disk recording; Frequency measurement; Frequency response; Magnetic heads; Magnetic recording; Pulse measurements; Signal to noise ratio;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.312294

Filename

312294