Using the FAB-Lab for BGA PCB Protyping Many components come only in BGA packages. Using the modella and a 1/100in end-mill it is possible to create functional boards with traces of less than 4mil width. BGA PCB milling using the Fab-workflow: - Is ...
How is solder mask applied on PCB?
Making Your Own Solder Paste Stencils - SparkFun Electronics