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. 27, 1989
Filed:
Nov. 04, 1987
Nathaniel C Anderson, Pine Island, MN (US);
Marlin E Miner, Dodge Center, MN (US);
Lubomyr T Romankiw, Briarcliff Manor, NY (US);
Steven F Starcke, Rochester, MN (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
The mixed potential of a standard reference electrode and an electrically conductive article that is being electrolessly plated is compared to a DC reference voltage. A predetermined level of comparison indicates the start of electroless plating. This comparison starts a timer. After a predetermined time interval has expired, plating is terminated. The result is a plated coating that is uniform and of a closely controlled thickness. The article to be plated is a thin film magnetic recording disk upon which a thin cobalt containing layer, in the range of about 850 angstroms thick, is to be plated.