Soldering method

Details Soldering method Soldering method

1987-12-31

1989-04-18

Godici, Nicholas P.

Metal fusion bonding

Process

Plural joints

228225, 228248, B23K 102

Patent

active

048219460

ABSTRACT:
A soldering method of this invention has the steps of coating a plurality of lead terminals of an electronic component with connecting paste-like solders corresponding to lead terminals on conductive pads disposed on a substrate, holding the electronic component at the position separated from the corresponding paste-like solders at the lead terminals, and thereafter moving the substrate into a heating atmosphere furnace to melt the paste-like solder. In the melting step, the paste-like solders start melting when the temperatures of the pads arrive at the melting point of the solder and flow on the pads until contacting with the corresponding lead terminals. Thus, improper connection of the lead terminals to the pads due to smaller thermal capacity of the lead terminals than that of the substrate including the pads can be eliminated and productivity can be greatly improved.

REFERENCES:
patent: 3451122 (1969-06-01), Kuhns et al.
patent: 3465422 (1969-09-01), Stenerson

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