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.
ALPHA® Telecore XL-825 lead-free cored solder wire minimizes spattering in hand soldering operations, thus reducing circuit board contamination and enhancing worker safety and comfort.
