Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


Water soluble solder mask for reflow soldering.

Views: 929

#83591

Water soluble solder mask for reflow soldering. | 17 October, 2019

Hi,

We have solder reflow use with water soluble flux and Tin/lead process. There is special glass component which needs to mask during reflow soldering and wash flux+solder mask post soldering.

The existing solder mask does washes off. But leaves kind of stain which would not be recommended for medical purposes. We can't use peelable as reflow is vaccum type with nitrogen atmosphere. Peelable is too thick.

We tried with Techspray and other local supplier and we are in Melbourne, Australia. But all have some issues.

Can someone suggest good water soluble solder mask for reflow profile which does not leaves any residue?

Thanks

reply »

#83600

Water soluble solder mask for reflow soldering. | 18 October, 2019

I know you mentioned you use a Tech Spray product. We have had success with their "Wondermask" water soluble product. When using a chemical additive (saponifier) in an aqueous cleaning system we have not experienced residues. I hope that helps. https://www.techspray.com/wondermask-wsol-washable-solder-mask-2

Mike Konrad Aqueous Technologies konrad@aqueoustech.com

reply »

fluid dispensing pumps for integration

Reflow Oven