One of the reasons, years ago, we all attempted to run as fast as possible away from DFSM is it doesn't adhere well to much of anything. Earl Moon ----- Original Message ----- From: Stephen R. Gregory <[log in to unmask]> To: <[log in to unmask]> Sent: Wednesday, August 25, 1999 2:27 PM Subject: [TN] Dry Film Soldermask Adhesion.. > Hi Ya'll! > > I've had one of our buyers come to me with a problem that we have with one of > the fabs we buy. > I'm no expert on fabs by a long shot, but I told him know where to ask (am I > kissing-up enough? Hehehe...) > > Problem is with a fab (GFG laminate) that our customer is specifying dry > film...they want to ensure the via's > are tented. There isn't a brand specified, but they do want the fab masked in > accordance with IPC-SM-840 Class-3 > Type B dry film. Our fab vendor has chosen to use a Dynachem dry film. The > problem we're having is that the mask is > flaking from the bare copper. The fab vendor is suggesting that our cleaning > chemistry may be causing the problem. > We're using Aquanox XJN in a MCS-1000 Electrovert cleaner. The wash > temperature is 140 F., and my rinse is 120 F. > > Know what might be causing this? Do you recommend any other brand dry film? > > Thanks! > > -Steve Gregory- > > ############################################################## > 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 ##############################################################