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Wear Resistant GaFeO(3) Coatings

IP.com Disclosure Number: IPCOM000075755D
Original Publication Date: 1971-Nov-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Sadagopan, V: AUTHOR [+2]

Abstract

Wear-resistant overcoatings of GaFeO(3) have been fabricated onto the surface of permalloy films that are used as read heads in the disc technology. This is accomplished to minimize the wear resulting from contact between the permalloy film and a spinning Fe(2)O(3) disc. Overcoatings of GaFeO(3) have been fabricated by radio-frequency sputtering technique. Deposition rates >/- 2 angstroms/sec and substrate temperatures approx. 40 degrees C led to the most favorable microtopography, from the standpoint of wear resistance. Films prepared under such conditions had a pattern of closely packed 0.05 mu - 0.5 mu diameter flat-topped hillocks, that resisted wear favorably and thereby protected the underlying permalloy film.

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Wear Resistant GaFeO(3) Coatings

Wear-resistant overcoatings of GaFeO(3) have been fabricated onto the surface of permalloy films that are used as read heads in the disc technology. This is accomplished to minimize the wear resulting from contact between the permalloy film and a spinning Fe(2)O(3) disc. Overcoatings of GaFeO(3) have been fabricated by radio-frequency sputtering technique. Deposition rates >/- 2 angstroms/sec and substrate temperatures approx. 40 degrees C led to the most favorable microtopography, from the standpoint of wear resistance. Films prepared under such conditions had a pattern of closely packed 0.05 mu - 0.5 mu diameter flat-topped hillocks, that resisted wear favorably and thereby protected the underlying permalloy film. The compatibility of GaFeO(3) film with permalloy and the presence of the flat-topped hillock structure in the protection film, are two factors believed to be responsible for the satisfactory wear properties of GaFeO(3) films.

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