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

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


About use of water washable pastes and fluxes

#31902

About use of water washable pastes and fluxes | 5 January, 2005

We wand to start using of water-washing-off pastes and fluxes. In the technology of cleaning supersonic cleaning + deionized water at finish will be applied. Hence there are some questions: 1. Is it enough to use only water while cleaning or is it necessary to use any additional chemistries and/or saponifiers as well? 2. Where should the used water be pour out to? In Datasheet for paste and flux there is no information concernig the matter. 3. What pastes do you prefer? Hope for competent comments. Thank you.

reply »

#31903

About use of water washable pastes and fluxes | 5 January, 2005

Q1. Is it enough to use only water while cleaning or is it necessary to use any additional chemistries and/or saponifiers as well? A1. It depends on: * Flux residues that you're cleaning * Standoff of the components * Cleaning technology [we've never heard of 'supersonic cleaning'].

Q2. Where should the used water be pour out to? In Datasheet for paste and flux there is no information concernig the matter. A2. It depends if the output of your post-cleaning water purification process is acceptable to your PTO.

Consider: * IPC-AC-62A - Post-Solder Aqueous Cleaning Handbook * Your cleaning equipment suppler should be able to help you focus on the details of your concerns.

reply »

Boundary Scan

Six Sigma Training