Patent ID: 8668994
Filing Date: 2014-03-11
Classification: B32B,C22C,C23C,C23F,C25D,H05K,Y10T

Abstract:
1. A rolled copper foil or electrolytic copper foil for forming electronic circuits by etching, wherein the rolled copper foil or electrolytic copper foil comprises a nickel or nickel alloy layer (A) with a lower etching rate than copper formed on an etching side of the rolled copper foil or electrolytic copper foil, and a heat resistance layer (B) composed of at least one of zinc, zinc alloy and its oxide thereof, formed on the nickel or nickel alloy layer (A), wherein the rolled copper foil or electrolytic copper foil has a side that Is opposite of the etching side and that is bonded to a resin substrate.