Cecilia

On FR-4, you are probably going to have so much difficulty under those conditions, that you will never do it effectively with a solvent. On a ceramic substrate,
you may have a slightly better chance. However, it is possible that I may have an answer for you which I'm researching at this moment for one of my US customers
who has a similar problem. I'll know better in 4-6 weeks. The big problem is that your Swedish EPA may not like it, as they have virtually said one big nyet to
any solvent with just one halogen atom per molecule. This means you must use a flammable or combustible solvents and, apart from the hazard, there are
compatibility difficulties. I presume, in your subject title the word "solvent" does not include the most universal of all solvents, water?

Brian

"Cecilia Alkhagen (EMW)" wrote:

> Hello!
>
> Could anyone tell me the most effective way of cleaning RMA-flux on FR4-boards as well as ceramic substrates. Both inline and batch cleaning is of interest.
> Component stand-off is 0.04mm in some cases and micro-BGA:s are soon in the production line.
>
> Cecilia Alkhagen
> Ericsson Microwave Systems AB
> SE-431 84 Mölndal
> Sweden
> Phone: +46 31 747 02 88
> Fax: +46 31 747 26 35
>
>
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