Juan, I want to echo what Brian as said and add one thing. In the United States the FAA and the DoD do not look favorably on the "no-clean" process in general and conformal coating over "no-clean" fluxes in particular for flight and mission critical systems. David A. Douthit Manager LoCan LLC "Juan T. Marugán" wrote: > Hi technetters ! > > Although I’ve read some messages about this matter, let me ask you some > additional information. > > For our class 3 boards (avionics & military), we used rosin fluxes (ROL0). > Now, we are thinking about to subcontract the assembly of some type of > boards. One of the possible subcontractors uses no-clean organic flux > (ORL0) for wave soldering. No post-solder cleaning is performed. > > After this assembly, we have to solder some components/wires to these > boards so we will use our rosin flux. And, at the end, boards will > conformal coated with Humiseal (acrylic). > > My questions are: > > 1.- Can the use of an organic flux (residues) to produce some effect in the > solder joints performed later using rosin flux? > 2.- What happen when these boards are cleaned with CFC solvents (Forane)? > 3.- Have no-clean flux residues some effect in the quality (adherence, ...) > of conformal coating? > > Thank you from Spain for your help. > > Juan T. Marugán López > Production Quality Assurance > > INDRA EWS, Sociedad Anónima > C/ Joaquín Rodrigo 11 > 28300 Aranjuez - Madrid (SPAIN) > [log in to unmask] > www.indra.es > > --------------------------------------------------- > Technet Mail List provided as a free service by IPC using LISTSERV 1.8e > To unsubscribe, send a message to [log in to unmask] with following text in > the BODY (NOT the subject field): SIGNOFF Technet > To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) > To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest > Search the archives of previous posts at: http://listserv.ipc.org/archives > Please visit IPC web site http://www.ipc.org/html/forum.htm for additional > information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 > ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 -----------------------------------------------------