Specialized metallurgical processes – compositions for use therei – Compositions – Loose particulate mixture containing metal particles
Reexamination Certificate
2007-08-28
2007-08-28
Wyszomierski, George (Department: 1742)
Specialized metallurgical processes, compositions for use therei
Compositions
Loose particulate mixture containing metal particles
C148S432000, C420S499000
Reexamination Certificate
active
10471132
ABSTRACT:
A member having a separated structure made by an alloy consisting of two regions having different compositions with each other is formed by casting a molten alloy into a prescribed shape, or by spray-quenching the same from a temperature of Tc+10° C. or more, wherein the molten alloy exhibits two phase separation in a liquid state having a temperature difference ΔT between the maximum temperature Tc (° C.) and minimum temperature Td (° C.) in the region of two phase separation in the liquid state being 10° C. or more, and the molten alloy has a mean composition with a difference of the volume fraction between the two liquid phases of 5% by volume or more. The suitable alloy is a Cu—Fe—X alloy, a Cu—Cr—X alloy, a Cu—Co—X alloy, a Cu—Bi—X alloy, an Al—Sn—X alloy or an Al—In—X alloy. The powder obtained by spray-quenching any one of the molten alloys of the Cu—Bi—X alloy, the Al—Sn—X alloy and the Al—In—X alloy has a separated structure comprising a surface portion having a solder composition and a core portion with a composition mainly comprising Cu and Al being excellent in electrical conductivity and heat conductivity and is suitable as a solder ball.
REFERENCES:
patent: 2058376 (1936-10-01), Crichett
patent: 3918957 (1975-11-01), Suzuki et al.
patent: 4166147 (1979-08-01), Lange et al.
patent: 4387276 (1983-06-01), Plewes et al.
patent: 5643679 (1997-07-01), Ishimaru et al.
patent: 6783569 (2004-08-01), Cheon et al.
patent: 7045113 (2006-05-01), Dorfman et al.
patent: 914951 (1972-11-01), None
patent: 1 284 994 (1972-09-01), None
patent: 1284994 (1972-09-01), None
Zhu, M. : “Microstructure Characteristics of Nanophase Composite Synthesized By Mechanical Alloying of Immiscible Pb-Al and Fe-Cu Systems,”Scripta Materialia, vol. 36, No. 4, pp. 447-453 (1997).
He, L. et al. “Processing and microhardness of bulk Cu-Fe nanocomposites .” Nanostructured Materials 7, vol. No. 3, pp. 327-339, 1996.
Ishida Kiyohito
Kainuma Ryosuke
Ohnuma Ikuo
DLA Piper (US) LLP
Wyszomierski George
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