Allan David

US Patent:

45404739, Sep 10, 1985

Filed:

Nov 22, 1983

Appl. No.:

6/554484

Inventors:

Perminder S. Bindra - Ossining NY
Allan P. David - Binghamton NY
Raymond T. Galasco - Binghamton NY
Charles E. Gasdik - Endicott NY
David N. Light - Briarcliff Manor NY
Paul B. Pickar - Vestal NY

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

C25D 338

US Classification:

204 52R

Abstract:

A copper plating bath containing a sulfur-containing anion other than sulfate anion and/or a selenium-containing anion other than a selenate anion and/or a tellurium-containing anion other than a tellurate anion in an amount sufficient to increase the plating rate, and method for electroplating copper onto a substrate with the plating bath.

US Patent:

44579861, Jul 3, 1984

Filed:

Dec 30, 1982

Appl. No.:

6/454746

Inventors:

Perminder S. Bindra - Ossining NY
Allan P. David - Binghamton NY
David N. Light - Putnam Valley NY

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

H01M 492
H01M 808

US Classification:

429 40

Abstract:

Fuel cell catalysts which are efficient, long-lived, and refurbishable in-situ include gold carrying a UPD deposit of another element. UPD Ag, Pt, Pd, Ir, Rh or Tl, Pb and Bi on Au crystallites are carried on and bonded to another substrate. The crystallites cause dissociative adsorption of the oxygen molecules so that four electrons are produced per molecule during the reduction reaction which is involved. In an alkaline electrolyte, the catalyst metals such as Pd, Ir, Ag, Rh and Pt show no tendency to poison the counter electrode (counter relative to the other electrode) since each of those metals is a good catalyst for both electrodes. Suitable fuels include methanol (CH. sub. 3 OH), formaldehyde (HCHO), and formic acid (HCOOH).

US Patent:

44798520, Oct 30, 1984

Filed:

Jan 21, 1983

Appl. No.:

6/459930

Inventors:

Perminder S. Bindra - Ossining NY
Allan P. David - Binghamton NY
Raymond T. Galasco - Binghamton NY
David N. Light - Putnam Valley NY

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G01N 2746

US Classification:

204 1T

Abstract:

The concentration of an organic additive in a plating bath is determined by providing a polished and constant current density preplated rotating disc cathode, a reference electrode and anode in an electrolytic copper plating bath, passing an electric current from the anode to the cathode and reference electrode; measuring the voltage difference between the cathode and reference electrode; and comparing the difference to values for known concentrations of the organic additive.