LPD Lab Services can assess PCB’s for a wide range of ionic contamination. These include anions, cations and weak organic acids (WOAs).
Ionic contamination on PCB’s can lead to serious quality issues. Product reliability can be affected. Lifetimes can be shortened especially in environments where moisture levels cannot be controlled. The combination of moisture with residual ionic contamination can increase the risk of short circuiting.
Ionic contamination combined with the DC voltages present can also enhance dendritic growth again leading to short circuits and premature failure.
Using the methodology detailed in IPC-TM-650 2.3.28, samples are soaked in a water/IPA mixture. This is then then analysed using ion chromatography for the target anions, cations or WOAs specified by the customer. LPD can achieve sensitivities as low as 0.05ug/cm2. If lower sensitivities are required, this may be possible in some cases depending on samples and species.
Ionic Species by IC
||Weak Organic Acid
If you would like to know more about the ionic cleanliness assessment and testing facilities available at LPD, please contact Dr Wyndham Johnstone.