Hey Cecilia!

        Depending on the board population I do a cascade, agitated, soaks in
either isopropyl alcohol, Ionox BC, or PPG's Trans LC (Trans 1,2
Dichloroethylene) or use a spray Chemtronics Flux Off Rosin - didn't work
too well as a soak (visible residues), .

        And then run the assembly through our in-line cleaner with 25%+
concentration Aquanox XJN.

        Oh yeah, we use Kester 186 & 186-18 RMA Fluxes.

        And as always the sooner you clean it the easier it gets.

        Hans

        ~~~~~~~~
        Hans M. Hinners
        Materials (& Process!) Engineer         	
        Warner Robins - Air Logistics Center/Avionics Production Division 
        Manufacturing Branch (LYPME)
        380 Second Street, Suite 104    (Building 640)
        Robins AFB, GA  31098-1638
        912-926-1970 (Voice) 468 - 1970 (DSN)  912-926-7164 (Fax)
        mailto:[log in to unmask]


> 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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