Ivan, Is the LEDs the only place your seeing the blowholes? When you run a bare board do the blowholes go away? If you have eliminated the board as a source for the blowholes, does the assembly sizzle when it is going over the wave? If so, I would suspect the more preheat might help. Gary Camac Ivan Barrios wrote: > I am currently having an issue with blowholes on TH components. What I have > concluded is that the components are too tight and sit flush against the top of > the board. When they go through wave solder, the outgassing has no way to go but > down towards the wave solder. We have tried loosening up components but then we > incurr having the LED's uneven after wave solder (and the LED's do not match up > to the corresponding window in the enclosure) and are currently looking for an > alternate LED that has standoffs so that the plated barrel is not sealed at the > top. My question is: Is there anything that can be done process wise to reduce > this defect? Thanks to all for your input > > Ivan Barrios > > ############################################################## > 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 ##############################################################