The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 14, 1983
Filed:
Sep. 28, 1981
Tu Chen, Saratoga, CA (US);
Pietro L Cavallotti, Milan, IT;
Xerox Corporation, Stamford, CT (US);
Abstract
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 before the precipitation of a secondary precipitate, e.g., Co(OH).sub.2, will occur in the bath solution bulk.