DocumentCode :
981644
Title :
A 5 megabyte flexible disk
Author :
Bate, G. ; Hampton, G.J. ; Latta, B.J.
Author_Institution :
Verbatim Corporation, Sunnyvale, California
Volume :
17
Issue :
4
fYear :
1981
fDate :
7/1/1981 12:00:00 AM
Firstpage :
1408
Lastpage :
1413
Abstract :
The data capacity of a double-sided, 8" diameter flexible disk has been increased from 1.26 megabytes without any substantial enhancement of the magnetic properties. Iron oxide particles of acicularity 
and a coercivity of 300 Oe were used; however, the coating thickness was reduced from 100μ" (2.5μm) to 40μ" (1.0μm) to permit a linear density of 10,700 flux changes per inch on the innermost track to be achieved with a resolution (2F/1F amplitude) of 0.72 and a peak shift <4%. The design constraints are described and the problems of formulation, processing and testing are discussed.
and a coercivity of 300 Oe were used; however, the coating thickness was reduced from 100μ" (2.5μm) to 40μ" (1.0μm) to permit a linear density of 10,700 flux changes per inch on the innermost track to be achieved with a resolution (2F/1F amplitude) of 0.72 and a peak shift <4%. The design constraints are described and the problems of formulation, processing and testing are discussed.Keywords :
Magnetic disk recording; Coatings; Coercive force; Iron; Magnetic heads; Magnetic properties; Manufacturing; Mechanical factors; Particle tracking; Testing; Vehicle driving;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.1981.1061244
Filename :
1061244
Link To Document :
