Patent ID: 8304091

Claim:
An electrodeposited copper foil with carrier foil with a primer resin layer, comprising a bonding interface layer, an unroughened bulk copper layer, a rust proofing layer and the primer resin layer which are formed in the recited order on a surface of at least one side of the carrier foil, wherein a) the rust proofing layer comprises a plated Ni—Zn alloy layer and a roughness R zjis measured on a surface of said plated Ni—Zn alloy layer is not more than 3 μm, b) said plated Ni—Zn alloy layer comprises at least Ni and Zn having a Ni/Zn deposit amount ratio of 1.5 to 10, c) a surface roughness R zjis of a deposition side surface of the bulk copper layer is not more than 3 μm, and d) the primer resin layer is a semi-cured primer resin composition which comprises an epoxy resin and a polyether sulfone, the polyether sulfone having at its ends functional groups selected from a hydroxyl group and/or an amino group, the primer resin layer has an equivalent thickness of 1 μm to 5 μm, and the primer resin layer is a layer that is bonded to a resin substrate layer.