Stock material or miscellaneous articles – Structurally defined web or sheet – Continuous and nonuniform or irregular surface on layer or...
Patent
1993-02-26
1995-05-09
Resan, Stevan A.
Stock material or miscellaneous articles
Structurally defined web or sheet
Continuous and nonuniform or irregular surface on layer or...
428142, 428148, 428457, 428611, 428642, 428645, 428646, 428648, 428658, 428659, 428694TS, 428694TR, 428900, 428928, G11B 500, C23C 1400
Patent
active
054138353
ABSTRACT:
A magnetic recording medium includes a successively formed uneven underlayer and magnetic layer. In the process of forming the underlayer, grains of an alloy, whose melting point is in the range of approximately 100 degrees centigrade to approximately 350 degrees centigrade, are deposited on a substrate by using either an evaporation or a sputtering method, while maintaining the substrate temperature at a temperature which allows molten spheres of the alloy to be formed. The preferred alloys include Zn, Mg, Al, In, and Sn systems whose melting points fall within the above-mentioned temperature range. The preferred substrate temperatures are not higher than the melting point of the alloy to be deposited plus 50 degrees centigrade, and most preferably, temperatures equal to approximately the melting point of the alloy to be deposited minus 20 degrees centigrade. The result is a magnetic recording medium suitable for practical use which can be fabricated at a low cost. In addition, in magnetic recording apparatus, the occurrence of adhesion between a magnetic recording medium and a transducer head is reduced.
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Khandros et al. Thin-Film Topography Control with Transient Liquid Underlayer, J. Vac Sci. Technol A7(3) May/Jun. 1989, pp. 1334-1340.
C. Vahlas et al. Adsorption-Induced Solid-Liquid Interfacial Roughening in Zn Alloys J. Crystal Growth Sep. 92 (1988) 253-258.
Ikeda Yoshihiro
Takayama Shinji
Feig Philip J.
International Business Machines - Corporation
Resan Stevan A.
Strunck Stephen S.
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