Irregular shaped copper particles and methods of use

Details Irregular shaped copper particles and methods of use Irregular shaped copper particles and methods of use

2005-01-04

2005-01-04

Kopec, Mark (Department: 1751)

Compositions

Electrically conductive or emissive compositions

Free metal containing

C419S023000, C075S255000, C075S331000, C075S229000, C075S337000

Reexamination Certificate

active

06838021

ABSTRACT:
The present invention provides water atomized copper powder comprising substantially irregular shaped copper particles having at least a median D50particle size of from about 10 μm to about 50 μm. The powders of the present invention are suitable for use in electrically conductive compositions, such as copper-based adhesives. The present invention also provides methods of making these copper powders.

REFERENCES:
patent: 3202488 (1965-08-01), Erhreich et al.
patent: 4353816 (1982-10-01), Iwasa
patent: 4960459 (1990-10-01), Poole et al.
patent: 5534045 (1996-07-01), Ogura et al.
patent: 5683627 (1997-11-01), Katayama et al.
patent: WO 8402864 (1984-08-01), None
Klar et al “Copper P/M Products”, Metals Handbook, 10thEd. vol. 2, 1990 pp 392-402.

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