OUTLINE
This membrane segregation system enables the generation of highly concentrated (99.9-95%) nitrogen gas merely by supplying compressed air. It is possible to obtain highly concentrated (99.9-95%) nitrogen gas only by adjusting the flow at the nitrogen outlet and supplying air pressure.

EXAMPLES OF LEAD-FREE SOLDER IN N₂ ATMOSPHERE
(Pattern for QFPIC of 0.65mm pitch)

*1: Condition data shall be established as a standard that allows acceptable products when soldered using a soldering robot(LS-5TPS III).

EFFECTS OF NITROGEN GAS SOLDERING

• Soldering without oxide film is possible.
• Bubbles (cavities) formed in the section of soldered parts are reduced.
• Faulty soldering such as cold joints, dry joints and insufficient wetting are reduced.
• Solder spreading ratio is increased.
• Soldering involves fewer solder bridges, floats and horns.
• Cycle time required for soldering is reduced.
• The height of fillets is stabilized.
• Insufficient gloss due to overheating is reduced.
• The number of solder balls and solder flux splashes is reduced.
• The life of iron tips is prolonged.
• The number of bad or cold joint is reduced.
• The amout of residual flux is remarkably reduced. (The amout of residual flux is usually 2-3%, but it is reduced even further to 1% when nitrogen gas is used.)