Semi-Conductors

For years, component level manufacturers and semi-conductor producers have been using nitrogen inertion. Whether in the fabrication of stacked dies, rework, or component solder bumping, N2 allows for a larger process window in the safety of minimal oxygen. With the advent of mandated lead-free soldering, the critical issues of flux chemistry aggressiveness have again been raised. When this aspect of process control is coupled with the smaller Delta T temperature window, N2 inerting boosts production success.

Controlled nitrogen atmospheres in reflow, wave, selective, and rework applications give engineers a larger process arena to work in. Nitrogen also helps during the liquidous state while the solder is completing surface wetting for a good bond. We began testing PSA N2 generation with reflow and found that purity levels required for reflow, wave and selective soldering range from 99.5% to 99.99%.

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