Dynamic magnetic information storage or retrieval – Head – Head surface structure
Patent
1997-02-03
1998-11-17
Cao, Allen T.
Dynamic magnetic information storage or retrieval
Head
Head surface structure
G11B 5187
Patent
active
058385223
ABSTRACT:
Surface modification of magnetic recording heads using plasma immersion ion implantation and deposition is disclosed. This method may be carried out using a vacuum arc deposition system with a metallic or carbon cathode. By operating a plasma gun in a long-pulse mode and biasing the substrate holder with short pulses of a high negative voltage, direct ion implantation, recoil implantation, and surface deposition are combined to modify the near-surface regions of the head or substrate in processing times which may be less than 5 min. The modified regions are atomically mixed into the substrate. This surface modification improves the surface smoothness and hardness and enhances the tribological characteristics under conditions of contact-start-stop and continuous sliding. These results are obtained while maintaining original tolerances.
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Anders Andre
Anders Simone
Bhatia C. Singh
Brown Ian G.
Komvopoulos Kyriakos
Cao Allen T.
The Regents of the University of California
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