ROBOT.LK

Step by step guidance to make high quality PCBs with photoresist film sheets.

1. The film is folding in between of two cover film, remove one side first.

   

   1.jpg (76.81 KiB) Viewed 5203 times

2. Place the film on copper board, clean the copper board with sand paper beforehand, so it's easy to stick on it, make sure the film is flat, and without bubble

   

   2.jpg (83.62 KiB) Viewed 5203 times

3. Also possible to use an heat transfer machine to place the film like this (or heat the film up with iron, not too hot, so the film is fixed on top of copper plate)

   

   3.jpg (102.84 KiB) Viewed 5203 times

   

   4.jpg (116.44 KiB) Viewed 5203 times

4. Print Circuit board with photo film

   

   5.jpg (136.8 KiB) Viewed 5203 times

5. Exposure the circuit onto copper board which are already covered by film. Depends what kind of light you use, time is varying from 1 mins to 30 mins.For this UV light, you only need 1-2 mins

   

   6.jpg (90.38 KiB) Viewed 5203 times

6. Developing, remove the another layer of film, leave it in developing liquid which is pre-mixed with water by 1:00

   

   7.jpg (182.61 KiB) Viewed 5203 times

7. Etch

   

   8.jpg (170.6 KiB) Viewed 5203 times

8. Removing the rest film by film remover liquid pre-mixed

   

   9.jpg (170.5 KiB) Viewed 5203 times

   

   10.jpg (157.99 KiB) Viewed 5203 times

It is only for hobbyist, you will not get quality PCB for fine pitch components and thin tracks and also you need PCB drilling experience.

pcb assemblies