We are presently using vapor phase batch soldering on assemblies. We have done double sided assembly in the past, however one side was always small capacitors/resistors. A job is coming up in the future where we may need to do double sided assembly on a board with flatpacks on both sides (20-40 leaded about 25 pitch). I was wondering what type of material pr process is being used on double sided assemblies to hold the parts on during the soldering of the second side. I've heard about some adhesives others are using but they require a cure time in an oven. The problem created: 1) If you put the adhesive and the part on after the solder paste, the curing of the adhesive will dry out the solder paste, creating solderball city. 2) If you put the adhesive and the part down first, you can't screen the paste. Is there some kind of different adhesive out there or a different process anyone knows about? Thanks for your time Dean May NSWC Crane *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To subscribe/unsubscribe send a message <to: [log in to unmask]> * * with <subject: subscribe/unsubscribe> and no text in the body. * *************************************************************************** * If you are having a problem with the IPC TechNet forum please contact * * Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] * *************************************************************************** *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To subscribe/unsubscribe send a message <to: [log in to unmask]> * * with <subject: subscribe/unsubscribe> and no text in the body. * *************************************************************************** * If you are having a problem with the IPC TechNet forum please contact * * Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] * ***************************************************************************