Magnetic recording disk having a laser-textured surface

Details Magnetic recording disk having a laser-textured surface Magnetic recording disk having a laser-textured surface

1996-02-15

1998-06-16

Renner, Craig A.

Dynamic magnetic information storage or retrieval

Record medium

Disk

428694TR, 428694BR, 428694SG, G11B 582, G11B 5704

Patent

active

057680760

ABSTRACT:
A data recording disk having at least part of the data storage surface textured according to a process for creating a "distant bump array" surface texture for reducing stiction. The texturing process uses a tightly focused diode-pumped Nd:YLF or Nd:YVO.sub.4 or other solid-state laser that is pulsed with a 0.3-90 nanosecond pulse train to produce a plurality of distantly-spaced bumps in the disk surface. The bump profile can be selected as a smooth dimple or one with a central protrusion useful for low stiction without close spacing or elevated "roughness". The data-storage region of the disk surface can be textured for low stiction without materially affecting magnetic data storage density.

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patent: 5108781 (1992-04-01), Ranjan et al.
patent: 5388020 (1995-02-01), Nakamura et al.

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