The invention relates to an additional preparation technology of a double-side multilayer printed circuit. An
electroplating template is prepared, a single-side circuit board is prepared, holes are drilled in the single-side circuit board, another
electroplating template is adhered, the holes are metalized by chemical coppering, the holes are thickened by electro-coppering, the other
electroplating template is peeled to obtain the needed double-side
printed circuit board, and the multi-layer printed circuit is obtained by repeating the above steps. The electroplating template for preparing conductive lines can be reused via post
processing, repeated
mask layer preparation in traditional circuit board preparation is avoided, and development of the
mask layer and
pollution of a waste liquid are both reduced. According to a template transfer technology, as the additional preparation technology,
etching of
metal foils is not needed, there is no waste of
metal, and the cost of handling waste liquid
pollution and treating waste water caused by
metal etching is reduced. Thus, compared with a traditional reduction type
corrosion method for preparing the double-side multilayer printed circuit, the technology has the advantages of being waste-free and low in
pollution and reducing the cost, and is worthy of application.