Trial for Deep Submicron Track Width Recording

Hiroaki MURAOKA  Yoshihisa NAKAMURA  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E78-C   No.11   pp.1517-1522
Publication Date: 1995/11/25
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Ultra High Density Information Storage Technologies)
Category: 
Keyword: 
perpendicular magnetic recording,  narrow track,  single-pole head,  multilevel recording,  partial response,  signal-to-noise ratio,  

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Summary: 
Extremely narrow track width of deep submicron range is examined in perpendicular magnetic recording. Head field distribution of a single-pole head analyzed by 3-dimensional computer simulation results in a sharp gradient, but relatively large cross-sectional area is required to maintain head field strength. Based on this design concept, a lateral single-pole head is described and proved to attain track width of 0.4 µm. In addition, multilevel partial response appropriate to the new multitrack recording system is proposed.