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In addition to the most common method, the etching of copper substrates, the production of printed circuit boards is also possible by galvanic or non-galvanic coating with a conductor. Etching is also referred to as the subtractive, coating as the additive method. Through this latter method, extremely fine and complex conductor tracks can be produced. Another advantage of this method is the reduced amount of consumed caustics. In particular, non-galvanic coating is referred to as full additive process (see Subtractive process).