Cleaning PCB assemblies

Subscribe to Thread

We are going to start conformal coating PCB assemblies, and ... - Feb 27, 2006 by Melb

Options are: * Find a low residue flux and conformal coatin... - Feb 27, 2006 by davef

some coatings are more forgiving to surface contaminations t... - Feb 28, 2006 by Amol Kane

Melb

#40027

Cleaning PCB assemblies | 27 February, 2006

We are going to start conformal coating PCB assemblies, and I was wondering about cleaning the boards before coating them. Do I need to clean them and if so, with what? We currently us a no clean solder. I am worried about contamination on the board under the conformal coat. I welcome all and any help.

reply »

davef

#40035

Cleaning PCB assemblies | 27 February, 2006

Options are: * Find a low residue flux and conformal coating material that are compatable, so that cleaning is not required. * Use a cleanable low residue flux, clean according to the supplier's recommendations, and then coat boards.

reply »

Amol Kane

#40048

Cleaning PCB assemblies | 28 February, 2006

some coatings are more forgiving to surface contaminations than others. best way to go about is select some coatings with the properties you need and then trial the boards to see any coating defects (like dewetting, pinholes, flaking etc)

wiping with lint free alochol wipes for the boards that cannot be cleaned also goes a long way to promote adherence of the coating to the board.

reply »