Stock material or miscellaneous articles – Circular sheet or circular blank – Recording medium or carrier
Patent
1991-02-04
1994-07-12
Thibodeau, Paul J.
Stock material or miscellaneous articles
Circular sheet or circular blank
Recording medium or carrier
428141, 428694ML, 428694DE, 428694TR, 428694SG, 360135, 369277, 369280, B32B 302, B32B 310, G11B 566
Patent
active
053287401
ABSTRACT:
A surface of a magneto-optical recording medium of the present invention is textured with fine and physical protrusions and recessions. The shapes of physical protrusions and recessions vary at each radial locations on the medium such that, for example, rough protrusions and recessions are formed in inner parts of the recording medium and fine protrusions and recessions are formed in outer parts thereof. Therefore, floating force given to a floating head from the medium being rotated based on the constant angular velocity method through an air layer in the outer parts equals floating force in the inner parts. Consequently, since the floating height of the floating head becomes constant irrespective of radial locations on the medium, information can be recorded under constant recording conditions, permitting the accuracy of the recording to improve. Regarding a method for processing the surface of a magneto-optical recording medium relating to the present invention, for example, a texture tape whose roughness is large is used in inner parts of the medium while a texture tape whose roughness is small is used in outer parts thereof. As a result, a magneto-optical recording medium having the above characteristics is produced.
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Katayama Hiroyuki
Murakami Yoshiteru
Nakayama Junichiro
Ohta Kenji
Conlin David G.
Kiliman Leszek
Neuner George W.
Sharp Kabushiki Kaisha
Thibodeau Paul J.
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