I have been an avid electronics DIY guy for many years now, and I have spent a lot of that time struggling to learn how to make my own PCBs. I have tried every technique that I have come across on the internet, from iron-on print outs to dry photosensitive blue sheets. Sometimes I was successful in my efforts to make a passable PCB, but when it was time to reproduce those results, something would go wrong.
After a lot of attempts and frustration, I was determined to find a solution that didn't result in me sending my files off to a PCB fab house. I use a fab house after I have tested a design on a homemade PCB. I finally found a solution where I can reproduce aesthetically pleasing PCBs by using liquid negative photo-sensitive paint. In this Instructable, I will share with you a technique that I have developed to do this.
Hazardous chemicals are used in this tutorial and I am not responsible if you hurt yourself. Practice caution, follow common safety guidelines at all times, and use gloves and protective eyeware.
Gather the supplies needed.
1. Photosensitive paint
2. Small spatula
3. Mixing jar
4. Heat plate ( optional )
5. Silicon or plastic tongs
6. Protective gloves and eye-ware
7. Copper clad board
8. Scale ( optional )
9. Plastic container for etching
10. Aquarium pump with stone diffuser and hose
11. Inverted PCB artwork printed on a laser transparency
12. Paint brush
13. Jar to put the developing solution in
14. Clear plastic or glass plates and some clips
Hydrochloric acid (aka Muratic Acid from hardware store in the pool section or also found as a concrete cleaner)
Sodium hydroxide (drain cleaner)
Sodium carbonate (aka Washing soda found next to laundry supplies)