Does anyone know if a standard related to the cleaning of electronic boards
and connectors has been issued by any standard organization (IPC, ...) ?

If anyone has an internal procedure from his/her own company,  I would be
interested in getting some inputs

*Chris,
The only "standard" you will probably find with respect to the cleanliness
of bare boards or assemblies, is in J-STD-001 or IPC-601X series.  They all
boil down to the same thing, ionic cleanliness by resistivity of solvent
extract (ROSE) testing per IPC-TM-650, method 2.3.25.  They all have the
same value, 10 micrograms of sodium chloride equivalence per square inch.
There is plenty of industry data to show these tests are not repeatable,
not reproducible, and will not discriminate between good and bad product,
other than in the grossest cases.

Nor do I think a "standard" for anything other than ROSE will ever be
developed.  There are no more golden numbers that can be applied blindly
across the board.  Cleanliness has to be determined on a case by case or
family by family basis.

The best I think you can do is to find cleaning guidelines or starting
points.  CSL has some on their website at www.residues.com and the same
levels can be found in J-HDBK-001, section 8.

Doug Pauls
Rockwell Collins

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