Specialized metallurgical processes – compositions for use therei – Processes – Producing or purifying free metal powder or producing or...
Reexamination Certificate
2007-06-26
2007-06-26
Wyszomierski, George P. (Department: 1742)
Specialized metallurgical processes, compositions for use therei
Processes
Producing or purifying free metal powder or producing or...
Reexamination Certificate
active
11084116
ABSTRACT:
Copper particle clusters constituting a powder suitable for making a conductive paste are provided that are individually composed of not fewer than two and not more than 20 unit particles joined through neck portions. A conductive paste made from the powder is excellent in conductivity. A conductive filler for conductive paste is provided that consists essentially of a mixture of copper particle clusters A individually composed of two or more unit particles joined through neck portions and spherical metallic particles B of smaller diameter than the particles A. A conductive paste made from the filler is low in viscosity and excellent in conductivity.
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Miyoshi Hiromasa
Okada Yoshihiro
Sano Kazushi
Takada Yoshiomi
Dowa Mining Co. Ltd.
McDermott Will & Emery LLP
Wyszomierski George P.
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