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Method of Plasma Treatment on Magnetic Coatings

IP.com Disclosure Number: IPCOM000045128D
Original Publication Date: 1983-Feb-01
Included in the Prior Art Database: 2005-Feb-06
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Ko, M: AUTHOR

Abstract

Plasma consists of a gas mixture containing free radicals, excited positively and negatively charged particles and uncharged gases. These plasmas are generated by a radio frequency energy source.

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Method of Plasma Treatment on Magnetic Coatings

Plasma consists of a gas mixture containing free radicals, excited positively and negatively charged particles and uncharged gases. These plasmas are generated by a radio frequency energy source.

Most polymeric materials have surface energy characteristics that reduce wettability and bondability. Surface wettability and bondability are the critical factors affecting lubricant retention on the surface of the magnetic coating. It has been known that the more uniform and the higher the lubricant retention on the surface, the better the wear performance of the magnetic coating.

The present process provides a new method of surface treatment of organic or inorganic magnetic coatings to improve wettability and bondability of a lubricant onto the surface. The treatment contributes to the wear resistance and lubrication of the recording head and magnetic disk or tape.

Heretofore, the untreated surface had poor wettability to the applied lubricant, and the lubricant was mechanically forced into the surface with extreme pressure and heat. The present plasma treatment is believed to decrease contact angle, improve roughness and porosity without drastically increasing the peak to valley unevenness of the surface, and still hold more lubricant evenly throughout the magnetic disk or tape.

The method is applicable to various gaseous or liquid mixtures which include monomers, hydrogen fluoride, silicone compounds, etc. The irradiati...