Tech Tips

Trouble with soldering defects?

  • N2We help you clear it by N2 system.
  Soldering defect samples Effect of N2 system reduce soldering defects
·Protrusion icicle
·Insufficient solder filling in PTH
·Soldering defects caused by insufficient heat
Preventing oxidation and preheating effect
·Damaged components (condenser, LED, etc.) by rapid heat preheating effect

*In the soldering industry, ”wetting” is the phenomenon that melted solder contacts with a metal surface and flows and spreads over the surface. “Wettability” means a spontaneous solder spreading.

A : Bridging, Protrusion icicle, Insufficient solder filling in PTH and Soldering defects caused by insufficient heat

Soldering defect causes Improve soldering environment by N2 system Preventing oxidation and preheating effect.
  • The high temperature stimulates oxidation of solder and workpiece surface. It results solder unwettability.
  • Insufficient heated workpiece causes solder to melt hardly. It leads to soldering defects.
img Solderbility improves by soldering with nitrogen gas; it can block off oxygen around soldering point and preheat workpiece. *The followings are considered causes of soldering defects; how to manipulate soldering iron, the amount and speed to feed solder and oxidation of soldering tip.

Further expected effects

If solderbility improves;
  • Soldering with mildly activated flux can be done.
    N2 system solves the problem of combination with lead-free solder featuring bad solderbility and mildly activated flux.
  • Soldering multilayer P.W.B. can be done.
    N2 system solves the soldering difficulty of multiplayer P.W.B. caused by heat dispersion.

B : Damaged components (condenser, LED, etc.) by rapid heat

Soldering defect causes Improve soldering environment by N2 system preheating effect
  • If heated rapidly by soldering iron, components such as IC chip can be damaged.
img Preheating workpiece by heated nitrogen gas alleviates a rapid heat to the heat-sensitive components and allows to set at a low temperature.

Further expected effects

If preheating effect is taken;
  • Soldering process speeds up.
    N2 system saves soldering time because preheating makes solder reach melting point rapidly and wet very smoothly.
  • Oxidation of soldering tip being reduced.
N2 sysytem reduces oxidation of soldering tip by low setting temperature. *In addition to N2 system, the following products can alleviate oxidation. Tip cleaner HAKKO 599B, and Tip maintenance kits HAKKO FS-100 (chemical paste) /HAKKO FT-710 (tip polisher)