A printed circuit board, or PCB, is a flat board that holds the electronic components in electronic devices such as televisions, remote controls and computers. Electronics manufacturers and hobbyists print custom PCBs that display efficient, space-saving layouts of their circuit designs. Each PCB consists of at least two layers: a plastic or fiberglass surface and a copper plate. The copper plate is coated with photoresist, which hardens the circuit's paths onto the copper plate when the plate is exposed to UV light.
Instructions
1 Choose a clean, dust-free room. Clean the table where you will be working with a rag to remove dust.
2 Clean the copper side of the PCB with PCB rubber or soft sandpaper until the copper is shiny and free from dust and grease. Alternatively, clean the board using a scouring pad and water. Wait for the board to dry completely.
3 Lay the PCB on the table with the copper side up.
4 Hold the photoresist spray 20 to 30 cm away from the PCB at a 30 to 45 degree angle. Coat the copper evenly with photoresist. If you need a thicker coat, wait for the first layer to dry before spraying a second coat.
