H - Electricity – 01 – F
Patent
H - Electricity
01
F
356/199, 204/25
H01F 10/08 (2006.01) C25D 3/12 (2006.01) G11B 5/84 (2006.01) H01F 41/14 (2006.01)
Patent
CA 1227452
ABSTRACT OF THE INVENTION A method for producing a continuous thin film magnetic medium by electrochemical plating deposition, useful for perpendicular recording. The plated medium comprises a substrate upon which is deposited a thin magnetic layer consisting of acicular shaped crystalline particles with the crystallographic "c" axis of the crystal in each particle oriented parallel to the longitudinal axis of the particle acicula and the longitudinal axis of the acicular particles oriented substantially normal to the plane of said magnetic layer. The method comprises the steps of providing an electrochemical plating bath solution containing a salt solution of the magnetic elemental component or alloy thereof, e.g., Co salt solution, the bath having a predetermined ion concentration and electrodepositing the elemental component or alloy thereof on the substrate while maintaining the maximum pH value of the salt solution at a point below that where the precipitation of a secondary precipitate, e.g., Co(OH)2, will occur in the bath solution bulk.
408166
Cavallotti Pietro L.
Chen Tu
Sim & Mcburney
Xerox Corporation
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