Laser texturing magnetic recording medium with ultra-fine texture pattern
AssigneeSeagate Technology LLC
InventorsJialuo Jack Xuan, Chung-Yuang Shih
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Abstract
A method and apparatus for laser texturing data storage media surfaces to provide ultra-low glide avalanche in disk drives employs a continuous wave laser that is randomly modulated. A random signal generator produces a random signal that controls an acousto-optical modulator. The acousto-optical modulator, in accordance with the random signal, modulates the laser beam output of a continuous wave laser. A controllable, repeatable pattern is provided on the data storage media surface by the laser texturing with limited randomness in the circumferential direction to avoid resonance effects on a slider.
Claims19
An arrangement comprising:
- a laser;
- and means for forming a texture pattern on a surface with the laser through randomly modulating laser energy output by the laser.
An arrangement for texturing a media surface to produce randomly elongated asperities on the surface, the arrangement comprising:
- a laser producing a laser output;
- a modulator arranged to receive the laser output and modulate the laser output;
- a random signal generator coupled to the modulator to control the modulation of the laser output by the modulator;
- and
- a focusing arrangement that focuses the modulated laser output on the surface.
A method of producing an ultra-fine texture pattern on a data storage media surface for ultra-low glide and tribology performance, the method comprising:
- randomly modulating a laser beam;
- and
- focussing the randomly modulated laser beam on the data storage media surface to create randomly elongated asperities on the data storage media surface.
Dependencies are inferred from the claim text.