COMPOSITE METAL FOIL, COMPOSITE METAL FOIL WITH CARRIER, METAL-CLAD LAMINATE OBTAINED USING SAID COMPOSITE METAL FOIL OR SAID COMPOSITE METAL FOIL WITH CARRIER, AND PRINTED WIRING BOARD

摘要

is an object of the invention to provide a composite foil for preparing printed wiring board combines the three properties of good solubility due to a low thermal expansion than the good performance, good conductivity of copper and a copper etching solution. To achieve this goal, and one or more layers of copper layers, a composite metal foil made of a least one layer of a nickel alloy layer, the art of nickel alloy layer is a nickel-will form a molybdenum alloy, the total thickness of the at least one layer of copper layer T _Cu , the art one or more layers of nickel-when a _Mo -the total thickness of the molybdenum alloy layer T _{Ni , 0.08 T} sub Ni _{- Mo} / T _Cu composite according to claim satisfies the relationship of 1.70 It employs a metal foil and so on. ;