Hi All,

            I need help and guidance on dipping conformal coating of Solithane.

            Can anyone provide me with some guidance on "Dipping and Rework" processes and requirement (not spray). 

                a) What is the right viscosity of the mixture between Solithane 113 and C113-300? To ensure right coating and to eliminate bubbles effects?

                b) What temperature to set to ensure the process (thickness) consistence during the dipping process

                c) Must there be another air spray (temperature control?) process  to ensure the coating thickness.

                d) What is the speed on dipping and removing?

                

                e) What will be pot life of the mixture?

                f) What is the recommended curing method (temperature curve? or must be 5days or 10days requirement)

                g) If there are connectors, other then using RTV to cover these connector. Is there any other better and consistent matter to ensure that coating mixture does not move into the connectors?

                h) What chemicals is/are available to remove/rework on the coating if a component needs to be replaced? What other things must be taken note of?

                i) If the PCBA is cleared, should I bake those PCBA before the process (or same temperature as the coating mixture just before use?)

 

Sorry that I have some many questions as I am task to work and develop on this process and implement it within a month so your help and guidance is greatly appreciated! Thanks

 

Best Regards

GA Tan

            

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