A process for producing an electrodeposited
copper foil with its surface prepared, comprising the steps of: subjecting an electrodeposited
copper foil having a shiny side and a matte side whose average
surface roughness (Rz) is in the range of 2.5 to 10 mum to at least one mechanical
polishing so that the average
surface roughness (Rz) of the matte side becomes in the range of 1.5 to 3.0 mum; and subjecting the matte side having undergone the mechanical
polishing to a selective chemical
polishing so that the average
surface roughness (Rz) of the matte side becomes in the range of 0.8 to 2.5 mum. The invention further provides an electrodeposited
copper foil with its surface prepared, produced by the above process, and still further provides PWBs and a multilayer laminate of PWBs, produced with the use of the above electrodeposited
copper foil with its surface prepared. The mechanical polishing followed by chemical polishing of the matte side enables obtaining an electrodeposited
copper foil with its surface prepared, the matte side of which exhibits excellent properties, and hence enables obtaining PWBs and a multilayer PWBs which have excellent properties.