Vacuum Pump improve the quality of your homebrew PCBs

摘要

If like me you have been confronted with mediocre results when making certain PCBs, and if you're not put off by a little bit of DIY, then this is certainly going to be the solution for you.rnI have sometimes ended up with poor PCBs, for reasons which I didn't really understand, since the photoresist was of good quality, from a reliable source, and wasn't out of date, and the photo-sensitive coating appeared evenly spread. The exposure equipment was a standard PVC case type fitted with four 8 W actinic tubes, with a sheet of plastic foam to exert pressure over the whole of the area. Even though this pressure was only light, and the foam somewhat followed the slight curvature of the lid, I did check that it held a document the thickness of a PCB negative properly, and so should be even better with the thickness of the board itself added.