High density perpendicular recording at very low flying height under rarefied pressure condition

Author

Kato, T. ; Ohkubo, T. ; Kishigami, J.

Author_Institution

NTT Appl. Electron. Lab., Tokyo, Japan

Volume

26

Issue

5

fYear

1990

fDate

9/1/1990 12:00:00 AM

Firstpage

2433

Lastpage

2435

Abstract

To attain higher recording densities in perpendicular rigid disk drives, it is important to decrease the flying height. The relation between read/write characteristics and the flying height under reduced ambient pressures was measured. The reduced pressure allows the flying height to be freely controlled. The limit of recording density is evaluated from the viewpoint of the signal-to-noise ratio (SNR). The result is a recording density of over 600 kb/mm² with SNR of 26 dB from a combination of a thin-film head and a CoCr/FeNi double-layered medium with the very low flying height of about 0.05 μm. This recording density shows the potential of combining CoCr/FeNi media of thin-film heads in rigid disk drives

Keywords

magnetic disc storage; magnetic heads; 0.05 micron; 26 dB; CoCr-FeNi; SNR; double-layered medium; high density perpendicular recording; low flying height; perpendicular rigid disk drives; rarefied pressure condition; read/write characteristics; signal-to-noise ratio; thin-film head; Disk drives; Disk recording; Glass; Laboratories; Magnetic heads; Noise measurement; Perpendicular magnetic recording; Protection; Signal to noise ratio; Transistors;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.104755

Filename

104755