SNL initiatives in electronic fluxless soldering

Conference · Tue Jan 01 04:00:00 EST 1991

OSTI ID:5199601

Hosking, F M; Frear, D R; Vianco, P T; Keicher, D M

Conventional soldering of electronic components generally requires the application of a chemical flux to promote solder wetting and flow. Chlorofluorocarbons (CFC) and halogenated solvents are normally used to remove the resulting flux residues. While such practice has been routinely accepted throughout the electronics industry, the environmental impact of hazardous solvents on ozone depletion will eventually limit or prevent their use. Solvent substitution or alternative technologies must be developed to meet these goals. Sandia National Laboratories, Albuquerque has a comprehensive environmentally conscious electronics manufacturing program underway that is funded by the DOE Office of Technology Development. Primary elements of the integrated task are the characterization and development of alternative fluxless soldering technologies that would eliminate circuit board cleaning associated with flux residue removal. Storage and handling of hazardous solvents and mixed solvent-flux waste would be consequently reduced during electronics soldering. This paper will report on the progress of the SNL fluxless soldering initiative. Emphasis is placed on the use of controlled atmospheres, laser heating, and ultrasonic soldering.

• Research Organization: Sandia National Labs., Albuquerque, NM (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 5199601
• Report Number(s): SAND-91-1620C; CONF-9109259--9; ON: DE92000818
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420200* -- Engineering-- Facilities
Equipment
& Techniques
426000 -- Engineering-- Components
Electron Devices & Circuits-- (1990-)
54 ENVIRONMENTAL SCIENCES
540110
AIR POLLUTION ABATEMENT
ATMOSPHERES
CHLORINATED ALIPHATIC HYDROCARBONS
CONTROLLED ATMOSPHERES
ELECTRONIC CIRCUITS
FABRICATION
FLUORINATED ALIPHATIC HYDROCARBONS
HALOGENATED ALIPHATIC HYDROCARBONS
JOINING
LASER WELDING
MANUFACTURING
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
POLLUTION ABATEMENT
SOLDERING
ULTRASONIC WELDING
WELDING