1.Print the diagram required , Print it out on a glossy paper, such as Sticker paper or magazine paper.
2. Stick the circuit diagram on the paper with the circuit board (the diagram should be facing the copper part of the circuit board).
3.Use cutter cut removes any unnecessary sticker paper from the board leaving only wiring of the black circuit.
4.Etch the board using one of the methods below. This process removes any unnecessary copper from the board leaving only wiring of the final circuit.
5. Prepare the acid etchant. For example, some crystallized acids require being dissolved in hot water
6. Submerge the board in the acid.
7.Make sure to stir every 15-20 minutes.
8.Take the board out and wash all sticker paper out from the board
we'll see wiring of the circuit that is copper only.
9.Then drill mount points of circuit board
Drilling machines used for that are usually custom machines designed specifically for this purpose.
10.And
mount and solder the electronic components on board.