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:
Oct. 10, 1995
Filed:
Oct. 01, 1993
David S Lashmore, Frederick, MD (US);
David Kelley, Martinsburg, WV (US);
The United States of America as represented by the Secretary of Commerce, Washington, DC (US);
Abstract
This invention relates to an electrochemical treatment of metal substrates, including so-called 'difficult to plate metals' such as tungsten and molybdenum, wherein deoxidation and plating are carried out in the same electrolyte bath by exploiting the electrochemical window in potential and pH of a reduction/deposition. This window may be illustrated using Pourbaix diagrams. In the first step of the treatment, a direct current at a reduction potential is applied to the substrate to reduce oxides present on the surface of the substrate without causing metal to be deposited from the electrolyte. In the second step, the reduction potential is changed to a more negative deposition potential, and a direct current at this deposition potential is applied for a time sufficient to deposit metal from the electrolyte.