Ivan, Hans, I would not consider using bed-of-nails testers for circuit packs as a special case. Our company and many, many others have been using no-clean fluxes for almost a decade now. The use of proper pin heads, a good PM cleaning/replacement regime for the pins, proper spring tension and the use of a good quality no-clean flux, along with the other things that Jon and Kenneth mentioned, should make the problem of pin testability good away. For some no-cleans the use of nitrogen will help, as some of them have a tendency to go "crusty" in air. I do not believe you should have to "change the way you test and/or solder $$$)". regards, Bev Christian Nortel Networks > -----Original Message----- > From: Hinners Hans CIV WRALC/LYPME [SMTP:[log in to unmask]] > Sent: Monday, July 26, 1999 4:32 PM > To: [log in to unmask] > Subject: Re: [TN] No clean flux residue > > Hi Ivan and All, > > As you have discovered there really isn't a 'no clean' flux (at least with > 'special' cases, yours - Probe; mine - Conformal Coating). Somebody > correct > me if I'm wrong but you have a couple of choices - clean the probes, clean > the boards, or change the equipment/process (i.e.. change the way you test > and/or solder $$$). > > The question I have for the group: Would soldering in an inert environment > remove the need for flux all together? I would swear I have seen that > mentioned somewhere recently (where o where? - was it PC FAB or maybe > Precision Cleaning). > > Hans > > Air Force Material Command - We keep them flying! > ~~~~~~~~ > Hans M. Hinners WR-ALC/LYPME Bldg. 640 > Materials Engineer 380 Second Street, > Suite 104 > Manufacturing Eng. Sec. Robins AFB GA 31098-1638 > 912-926-1970 (Voice) 468 - 1970 (DSN) 912-926-7974 (Fax) > [log in to unmask] > > > > Hello Technetters: > > Being new to the list, I do not know if this issue has been discussed in > > the > > past, so here goes. What can be done to minimize/eliminate the residue > > left by > > the no clean fluxes on the PCB's? We currently have a big issue with > > residue not > > allowing our test pin probes to make contact. We have implemented > cleaning > > the > > probes on a regular basis, but I want to eliminate the issue altogether. > > If this > > has been discussed, please point me in the right direction (archived > > responses). > > If not, I would really appreciate your help. > > Ivan Barrios > > Process Engineer > > Conexant Systems > > El Paso, TX, > > > > ############################################################## > TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c > ############################################################## > To subscribe/unsubscribe, send a message to [log in to unmask] with > following text in > the body: > To subscribe: SUBSCRIBE TECHNET <your full name> > To unsubscribe: SIGNOFF TECHNET > ############################################################## > Please visit IPC web site (http://www.ipc.org/html/forum.htm) for > additional > information. > If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or > 847-509-9700 ext.5365 > ############################################################## ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or 847-509-9700 ext.5365 ##############################################################