Flexible copper clad laminate

Abstract

Provides a flexible copper clad laminate, which includes a polyimide substrate; a nickel-copper alloy layer; and a copper layer. The nickel-copper alloy layer is formed on at least one side of the polyimide substrate by electroless plating and comprises at least nickel, copper and phosphorus. A content of the copper is more than 30 wt % of the nickel-copper alloy layer, a content of the phosphorus is less than 5 wt % of the nickel-copper alloy layer, and a corrosion potential of the nickel-copper alloy layer in a 0.02 vol % sulfuric acid solution is greater than −20 mV. The copper layer is formed on a side of the nickel-copper alloy layer away from the polyimide substrate and combined with the nickel-copper alloy layer to form a metal conductive layer. In addition, the aforementioned flexible copper clad laminate has electrochemical corrosion resistance and sufficient peel strength, facilitating the production of flexible printed circuit boards.

Dependencies are inferred from the claim text.