Etching process

Ok, as for this week, I'm doing etching and all the process to convert my circuit on UV board. The process has been done at BMI Level 1, PCB room with assisted by Cik Siti.  Herewith is the process;

• to get started, remove the board from the envelope. Then peel off the protective pvc backing from the coating side of the uv board as shown in the picture below;

• next, during exposure with UV light, make sure that u're using the correct type of lamp specially made for photo resist exposure.After the exposure, u can see a faint shade of the artwork on the coating. 

• next, for developing, leave the board in a plastic tray with the UV coating side facing up. Soak the board with water contain of sodium hydroxid. Agitated the liquid by rocking the tray slightly. The movement of liquid will speed up the process. The images of pads and tracks will begin to appear after few minutes later. after developing complete, rinse the board in running water. 

• After that, is the etching process. The process using FeCl3 which is a highly corrosive chemical.

• After etching is complete, rinse the board with water. Next, remove the etch-resist coating by rubbing it with a piece of cloth with thinner. 

• Lastly is the drilling process to fill in the component to the board. Below is the result which is the finish product from etching up to complete circuit on breadboard.