Q. An etchant used in PCB making is
Solution:
The step where this etchant used in PCB making is,
Fill a plastic box with some water. Dissolve 2-3 teaspoons of ferric chloride power in the water. Dip the PCB into the etching solution (Ferric chloride solution, FeCl3) for approximately 30 mins. The FeCl3 reacts with the unmasked copper and removes the unwanted copper from the PCB.
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