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Rinse water resistivity/conductivity levels

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BR

#66414

Rinse water resistivity/conductivity levels | 22 May, 2012

I am looking for IPC or other published standards that specify cleanliness levels for:

1) solder paste stencils 2) selective solder pallets

When we cleaned PCB's we used a limit of 4 M-ohms. Now that we have transitioned to No-Clean, I am wondering if there are acceptable guidelines to reduce the limits for stencils and pallet cleaning as opposed to PCBA's.

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#66424

Rinse water resistivity/conductivity levels | 22 May, 2012

There is no standard, nor should there be. You need to establish a standard that meets your customer requirements.

The problem with those old-timey standard is that there's just so many choices. What works for you just might be too strict [or loose] for someone else. Who knows? If anyone does, you do. Go get 'em.

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