I am surprised that an one is still using dry film soldermask. And even more shocked that anyone has just started to use dry film. I was sure that the entire industry has converted to LPI. Why are you using dry film soldermask? ______________________________ Reply Separator _________________________________ Subject: ASSY: Dry film mask and paste thickness Author: [log in to unmask] at corp Date: 4/16/96 3:47 PM We have just started using a dry film mask(Vacrel), which is about .003" thick. We are using a .006" stencil and printing .020" pitch parts, and are measuring paste thickness of about .009". We are using a metal squeegee, but seeing some "dog ear" looks to the paste. We seem to be getting a poor separation of paste from the stencil. The mask is about .0005" higher than the pads. Our variation in paste height measurements on a board has increased by .002" from Photo Imageable to dry film. Are there any ideas on how to process a board with Vacrel to improve our printing process? Thanks for any ideas/suggestions. Steve Quinn Heurikon Corp 8310 Excelsior Dr Madison, Wi 53717 [log in to unmask]