Patent ID: 7172818
Filing Date: 2007-02-06
Classification: C25D,H05K,Y10T

Abstract:
1. A copper foil for chip-on-film use, a plasma display panel, or a high-frequency printed circuit board comprising a smooth surface having a surface area of not more than 1.30 times a surface area of an ideal smooth surface and formed on said smooth surface are fine roughening alloy particles of Cu and Mo or alloy particles comprising Cu and at least one element (I) selected among a group of Ni, Co, Fe, and Cr or a mixture of said alloy particles and an oxide of at least one element (II) selected among a group of V, Mo, and W, an amount of said one element (I) in said alloy particles being 0.1 to 3 mg/dm 2 foil per 1 mg/dm 2 foil of Cu or an amount of said one element (II) in said mixture being 0.02 to 0.8 mg/dm 2 foil per 1 mg/dm 2 foil of Cu, wherein the copper foil is obtained by rolling copper foil to form the smooth surface.