Electronics Forum | Mon Feb 25 14:32:37 EST 2002 | Kelvin
We always talk about the halide free fluxes and solder pastes. Is there anyone tell me what is the industrial acceptable level of halide content or contamination in flux residue? All comment are welcome !!! Kelvin
Electronics Forum | Mon Feb 25 21:13:12 EST 2002 | davef
No, none of us can tell you what is the acceptable level of halide content or contamination in flux residue. The level of harmful residues on your product helps determine the reliability of your product. We know nothing of your product, its custome
Industry News | 2003-04-07 11:00:15.0
The innovative VPI-1000 optical inspection system is the only benchtop SMT inspection system capable of inspecting BGA devices as standard, without necessitating a lengthy lens reconfiguration.
Technical Library | 2023-02-13 18:56:42.0
This paper describes the results of an intensive whisker formation study on Pb-free assemblies with different levels of cleanliness. Thirteen types of as-received surface-mount and pin-through-hole components were cleaned and intentionally contaminated with solutions containing chloride, sulfate, bromide, and nitrate. Then the parts were assembled on double-sided boards that were also cleaned or intentionally contaminated with three fluxes having different halide contents. The assemblies were subjected to high-temperature/high-humidity testing (85_C/85% RH). Periodic examination found that contamination triggered whisker formation on both exposed tin and solder fillets. Whisker occurrence and parameters depending on the type and level of contamination are discussed. Cross-sections were used to assess the metallurgical aspects of whisker formation and the microstructural changes occurring during corrosion.
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