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What defect in SMT were cuased by dust contamination?

Views: 1366

#86328

What defect in SMT will be cuased by dust contamination? | 27 February, 2021

Does anyone know what defect in SMT will be caused by dust contamination? What dust level in SMT environment is recommended?

Recently an audit come to factory and ask we must control the amount of dust. Why SMT line need to control the dust level?

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#86376

What defect in SMT will be cuased by dust contamination? | 8 March, 2021

For boards that would need the conformal coating process, you would need to have them as clean as possible; especially the no clean process

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#86382

What defect in SMT will be cuased by dust contamination? | 9 March, 2021

This have been solved by storing the boards right in all places I have worked. You open a pack, label and use. If you collect dust in such a small time window, you should totally start paying for cleaning service of the building. Electronics we build under controlled environment.

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#86386

What defect in SMT will be cuased by dust contamination? | 10 March, 2021

Below list based on my observations.

Nozzle block Sensor block Insufficient issue in printing Solderability issue due to fod

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#86406

What defect in SMT will be cuased by dust contamination? | 15 March, 2021

Thanks for the answer. Did you really find the dust block the nozzle and sensor? By the way, If SMT environment need to control the dust then what size of dust need to be controlled? 0.3um, 0.5um or 10um?

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