Electronics Forum | Tue May 25 18:08:19 EDT 2021 | scarittagle
A certain degree of cleanliness is needed in SMT manufacturing environment but not as overkill as place it in a "clean room" environment... Yes, dust could cause defect on PCBAs (and there are research papers about it too) but onl
Electronics Forum | Sat Feb 27 15:14:08 EST 2021 | researchmfg
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?
Electronics Forum | Thu Oct 21 13:08:38 EDT 2021 | ademrah
Hi, It depends on smallest pitch size of your components. For the 0.3 um, 0.5 um, etc. sizes could be mentioned on Clean Room. For example; for ISO-7 standart (Class 10,000) higher than 5um is not acceptable, however 1mm can acceptable to describ
Electronics Forum | Sat May 06 22:03:57 EDT 2006 | mika
There is a ISO Standard 14644-1 Class Limits, but I don't know if if this is applicable in the "so callled" SMT standard production scenaraio and if so, what class would it be? I hope that some other nice guys will correct me, or have i totally lost
Electronics Forum | Tue Oct 12 09:52:18 EDT 2010 | dyoungquist
Obviously a totally clean floor is the best. So what if you have 1 particle of dust on your entire production floor? Is that 1 part per million (1 PPM)? or is that 1 part per billion? or 1 part per ???? How do you measure dust and come up with a
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