Not another white residue season ! Every time Euro or States get snowed under this thing pops up ! No kidding George ; if you go to IPC files under "white residue" heading ' you'll understand why am I terrified of avalanches ; it's been answered at least 100x over in depth . Your's friendly fellow in flux Paul Klasek http://www.resmed.com > ---------- > From: Calvas, George (G.)[SMTP:[log in to unmask]] > Sent: Tuesday, 16 February 1999 7:48 > To: [log in to unmask] > Subject: [TN] White Residue between Solder Pads > > I read a posting on white residue between solder leads. I was hoping you > could give me insight of the probability of dendridic growth based on the > solder/flux combinations as well as the different cleaning solutions that > are used. I have been told that the residue (flux or cleaning solution?) > with proper humidity, bias and temperature could cause dendridic growth to > spread across adjacent leads which would obviously be a detrimental > failure. I am using surface mount devices of .050 spacing and .025 lead > width on an FR4 material. One final question, Is it the residual flux or > the cleaning solution or both that causes this anomaly. I would > appreciate > any insight to this problem. Thank You. > > George Calvas > Visteon Racing > Visteon Automotive Systems > Tel: 734-458-0307 > e-mail: [log in to unmask] > > ################################################################ > TechNet E-Mail Forum 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's web site (http://www.ipc.org) "On-Line Services" > section for additional information. > For technical support contact Hugo Scaramuzza at [log in to unmask] or > 847-509-9700 ext.312 > ################################################################ > ################################################################ TechNet E-Mail Forum 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's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################