Fluorescent water soluble solder flux

Details Fluorescent water soluble solder flux Fluorescent water soluble solder flux

1997-04-18

1998-10-13

Ryan, Patrick

Metal treatment

Compositions

Fluxing

148 24, 148 25, 148 26, 427310, 427 96, 428615, B23K 3500

Patent

active

058206973

ABSTRACT:
A mixture of a dye including one or more water soluble fluorescent dyes and a water soluble solder flux provides simple optical inspection under ultraviolet illumination with simple apparatus. The optical inspection is thus made highly sensitive to the presence of residual water soluble flux after washing and highly specific to the water soluble flux with which the dye is mixed. Thus, optical inspection can assure that all water soluble flux is removed to avoid subsequent corrosion while providing the possibility of leaving so-called "no clean" fluxes in place.

REFERENCES:
patent: 4137369 (1979-01-01), Chaikin
patent: 4670298 (1987-06-01), Lucas et al.
patent: 5650020 (1997-07-01), Ohta et al.

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