Patent ID: 7390742

Claim:
A method for producing a rewiring printed circuit board with a substrate having conductive passage connections between opposing first and second surfaces of the substrate, the method comprising: applying a first masking layer on the first surface; applying a second masking layer on the second surface; patterning the first and second masking layers to uncover a first contact location pattern on the first surface and a second contact location pattern on the second surface, respectively; and applying a first protective layer to the first surface in order to protect the first masking layer and the first contact location pattern during a subsequent process, wherein applying the first protective layer occurs prior to applying the second masking layer; the subsequent process comprising: forming a first conductor structure on the second surface, the first conductor structure covering the second contact location pattern; removing the first protective layer from the first surface; and subsequently forming a second conductor structure on the first surface, the second conductor structure covering the first contact location pattern.