... practice for ionic contamination detection limits. Design/methodology/approach PCBAs were subjected to different flux residue cleaning dwell times and cleanliness levels were verified with resistivity of solvent extract, critical cleanliness control (C3) test, and ion chromatography analyses to provide...

...Christopher Hunt; Angela Mensah; Anthony Buxton; Richard Holman Purpose This work sets out to characterise the protective properties of conformal coatings and how they degrade. Design/methodology/approach The approach dosed several commercial coatings with two different contaminants...

... components and/or boards with eutectic Sn‐Ag solder will result in joints contaminated with Pb. In this study, the effects of Pb contamination on eutectic Sn‐Ag solder joints were investigated using three ternary alloys made by incorporating some Pb into eutectic Sn‐Ag solder. These ternary alloys all showed...

...Qinong Zhu; Mei Sheng; Le Luo The effects of Pb contamination on the microstructure and shear strength of lead‐free solder joints with non‐lead containing finishes on both the PCB and terminals of 1,206 chip capacitors at different temperatures were investigated. Two kinds of lead‐free solders...

... © MCB UP Limited 1999 --> Multicore Contamination Printed circuit boards Multicore solders announces CM50 contaminometer for large PCBs Keywords Multicore, Contamination, Printed circuit boards The CM50 contaminometer allows easy and accurate measurement...

...L. Zou; M. Duˇsek; C.P. Hunt; B.D. Dunn The efficiency of cleaning of flux residues after various periods of ageing was assessed by measuring the ionic contamination removed in an Ionograph 500 SMD. The flux residues were removed from bare boards, and boards with through hole and surface mount...

...G. Grossmann The contamination on SMT assemblies caused by a number of flux/cleaning variation has been investigated, with several analysis methods used to quantify the contamination. The results from analysis of test printed circuit boards (PCBs) using anion separation, conductivity, ionic...