COMPOSITE METAL FOIL AND METHOD FOR PRODUCING THE SAME, AND PRINTED WIRING BOARD

摘要

PROBLEM TO BE SOLVED: To provide a composite metal foil which can be easily released after a heating compression process even when an acidic plating bath is used and the residue of which hardly remains at a substrate side of a printed wiring board and to provide a method for producing the composite metal foil.

SOLUTION: The composite metal foil has, on a carrier 2 made of a metal foil, a diffusion preventing layer 3 for preventing diffusion of a metal to a metal atom constituting the carrier 2, a release layer 4 made of a metal layer formed by a physical film-deposition method and a transfer layer 5 formed by a plating method. The release layer 4 and the transfer layer 5 comprise the same kind of metal atoms.

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