DocumentCode
820746
Title
Interferometric spacing measurements of the Bernoulli head/disk interface
Author
Wahl, Michael H. ; Briggs, J.C. ; Talke, Frank E.
Author_Institution
Center for Magnetic Recording Res., California Univ., San Diego, La Jolla, CA, USA
Volume
28
Issue
5
fYear
1992
fDate
9/1/1992 12:00:00 AM
Firstpage
2551
Lastpage
2553
Abstract
Head-to-disk spacing in a flexible disk drive (Bernoulli technology) is measured interferometrically using monochromatic light in conjunction with a grey level interpolation scheme. Measurements in the center region of a Bernoulli head indicate that the minimum head-disk separation is less than 50 nm, suggesting that the asperity contacts occur in the area of the closest approach. The spacing distribution of a typical Bernoulli head is reported, as well as a parameter study of spacing as a function of rotational speed
Keywords
distance measurement; floppy discs; light interferometry; magnetic heads; Bernoulli head/disk interface; asperity contacts; flexible disk drive; grey level interpolation scheme; head-disk separation; light interferometry; monochromatic light; rotational speed; spacing distribution; Area measurement; Assembly; Couplings; Disk drives; Interpolation; Magnetic devices; Magnetic heads; Magnetic recording; Magnetic separation; Optical interferometry;
fLanguage
English
Journal_Title
Magnetics, IEEE Transactions on
Publisher
ieee
ISSN
0018-9464
Type
jour
DOI
10.1109/20.179553
Filename
179553
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