FT-IR, Fourier-transform Infrared Spectroscopy
FT-IR is used to collect energy changes caused by the absorption or emission of infrared energy in various bonding structures in liquid and solid sample, and then form a infrared spectrum.
The infrared spectrum can be regarded as the “fingerprint” of the unknown. The obtained spectrum could be compared with the existing spectrum in the database for material research and analysis. Therefore, FT-IR can be used to confirm the organic film on the circuit board surface or the pollutants in manufacturing processes.
Ionizable Surface Contaminants
Ionizable Surface Contaminants by Resistivity of Solvent Extract (ROSE Test) is an analysis method which is measured by electrical conductivity meter and follows standard IPC TM-650 2.3.25. ROSE Test is a quantitative method for ionizable surface contaminants on PCBs. Test result is presented by the amount of total ionic residue and it can determine the ionizable surface contaminants on PCBs.
To find out the sources of contaminants or get more precise analysis results, it’s recommended to use Ion Chromatography(IC). Ion Chromatography can determine the species and concentration of ionic residues. Test method follows standard IPC TM-650 2.3.28.
IC, Ion Chromatography
IC can determine the species and precise concentration (ppm) of ions. It can do multi-ion measurement and shows high reproducibility.
Halogen Test uses oxygen bomb for sample pretreatment and follows standard BS EN 14582. After sample pretreatment, it would go through qualitative and quantitative analysis of halogen content by Ion Chromatography.
Halide Test uses dilution or water bath for sample pretreatment and follows standard IPC TM-650 18.104.22.168. After sample pretreatment, it would go through qualitative and quantitative analysis of halide content by Ion Chromatography.