2. Secondly, the circuit diagram will be transferred onto the copper plate with
the help of an iron. The copper plate is covered carefully with the paper of
circuit diagram and glued tightly around the copper plate. Then place the iron
on the top of the paper which is on the top of the circuit board and place the
iron there for about 30/45 seconds. When completed, take off all of the paper
from the iron. Finally, you have a copper board with your PCB pads and with
signal lines
3. Later, it is necessary to prepare the acid etchant by using chemical solutions
to remove all unnecessary copper on the board. For example, ferric chloride
is one of the most implemented ones to dissolve the copper. Moreover, we
need pure water to clean the acid drops or particles on the PCB. The chemical
solution will provide us to remove the copper except the marked areas on
PCB. PCB is then submerged into the ready solution and checked it every
single 30-35 seconds. Once the unnecessary copper on PCB is dissolved, take
the board out for next process. But, as the method requires extreme safety
measures, make sure that you take all the precautions to prevent the possible
dangers. By wearing safety glassess, gloves and aprons, you can minimize the
potantial effects of process.
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