Ronald W Haines

US Patent:

6322609, Nov 27, 2001

Filed:

Aug 27, 1999

Appl. No.:

9/384093

Inventors:

Stephen J. Kohut - Chandler AZ
Ronald K. Haines - Mentor OH
Nicholas D. Sopchak - Wynantskill NY
Wendy Gort - Tucson AZ

International Classification:

B22F 100

US Classification:

75255

Abstract:

This invention relates to a low density high surface area copper powder having an apparent density in the range of about 0. 20 to about 0. 60 gram per cubic centimeter, and a surface area of at least about 0. 5 square meter per gram. This invention also relates to an electrodeposition process for making the foregoing copper powder by electrodepositing the copper powder from an electrolyte solution using a critical combination of process parameters. These critical parameters include: a copper ion concentration for the electrolyte solution in the range of about 2 to about 7 grams per liter; a free chloride ion concentration for the electrolyte solution in the range of about 8 to about 20 ppm; an impurity level for the electrolyte solution of no more than about 1. 0 gram per liter; and an electrolyte solution that is free of organic additives.

US Patent:

6036839, Mar 14, 2000

Filed:

Feb 4, 1998

Appl. No.:

9/018269

Inventors:

Stephen J. Kohut - Chandler AZ
Ronald K. Haines - Mentor OH
Nicholas D. Sopchak - Wynantskill NY
Wendy Gort - Tucson AZ

Assignee:

ElectroCopper Products Limited - Mesa AZ

International Classification:

C25C 112

US Classification:

205574

Abstract:

This invention relates to a low density high surface area copper powder having an apparent density in the range of about 0. 20 to about 0. 60 gram per cubic centimeter, and a surface area of at least about 0. 5 square meter per gram. This invention also relates to an electrodeposition process for making the foregoing copper powder by electrodepositing the copper powder from an electrolyte solution using a critical combination of process parameters. These critical parameters include: a copper ion concentration for the electrolyte solution in the range of about 2 to about 7 grams per liter; a free chloride ion concentration for the electrolyte solution in the range of about 8 to about 20 ppm; an impurity level for the electrolyte solution of no more than about 1. 0 gram per liter; and an electrolyte solution that is free of organic additives.