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Data Recording at Ultra High Density

IP.com Disclosure Number: IPCOM000117947D
Original Publication Date: 1996-Jul-01
Included in the Prior Art Database: 2005-Mar-31

Publishing Venue

IBM

Related People

Authors:
Gill, HS [+details]

Abstract

Conventional longitudinal magnetic recording is expected to run up to fundamental bit density limitation somewhere between 10 to 100 Gbit/sq. inch. This is basically due to the fact that the written bits become unstable at high bit density. One solution is to use very high coercivity media, the calculations suggest that the thin film disk with coercivity well above 5000 Oe may be required to achieve stable written bits. The main problem then becomes writing on this high coercivity media. Inductive write head pole tip material with saturation magnetization above 30 KG is required for writing on media coercivity above 5000 Oe. Soft magnetic material with saturation magnetization above 30 KG does not exist.