Post #2978933

So! I adjusted the parameters a bit and made sure i got good contact between the design and the board. That last one helped immensely! I can now get a crisp clear transfer of the design into the photoresist. .. And thats where a problem lies. My printer isn't the best, and it especially doesn't play well with transparent paper. Even on the darkest setting, the design just doesn't look dark enough. And it smudges a bit, even after running the cleaning program. In some places the toner isn't applied enough and the traces are badly etched as a result. Some traces lose up to 90% of the copper which is not great. It also seems like some light is making it through the toner. Now i'm already exposing it fairly short, so I tend to think that I leave it in the developing bath for too long. I'll dramatically shorten that time for the next run to see if it makes any difference. I'll also replace the toner cartridge as its running low. That 0.8mm pitch QFP package got etched almost perfectly 😎