The Use of MICRO/ATR FTIR in PCBA CRD Smearing Failure AnalysisAuthors: Lee Kong Hui and Jason Ho Wye Meng
Company: Cisco Systems (Malaysia) Sdn. Bhd.
Date Published: 4/8/2014 Conference: Symposium
The case study presented here depicts that white notation ink for a few failing PCBAs were not properly cured during their manufacturing processes. Detailed comparison among the various samples FTIR foot print have further indicated that the improperly cured notation ink functional groups may have evolved and changed into other properties during wave soldering process. Matching rate of 95.26% FTIR foot print between the raw and wave soldered ink sample has confirmed fully cured marking ink properties, while a low matching rate of 33.97% for the failing PCBA sample is deducing improperly cured condition.
FTIR, Failure Analysis, PCBA, CRD Smearing, Wave Soldering Process
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