Solder compositions and methods of making same

Details Solder compositions and methods of making same Solder compositions and methods of making same

1994-02-17

1995-05-02

Rosenberg, Peter D.

Metal treatment

Compositions

Fluxing

148 24, B23K 3534

Patent

active

054116023

ABSTRACT:
Spherical solder drops having precise and accurate shape are formed by an ejection device and solidified to form solder balls for making solder pastes. The diameters of the solidified solder balls are determined by an excitation signal applied to the ejection device and changes in the diameter of the orifice in the ejection device. A solder paste is produced by mixing solidified solder balls of a single diameter or a combination of several different diameters with a carrier.

REFERENCES:
patent: 3986899 (1976-10-01), Kole
patent: 5147448 (1992-09-01), Roberts
patent: 5171360 (1992-12-01), Orme
patent: 5259593 (1993-11-01), Orme

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