Patent ID: 8524378
Filing Date: 2013-09-03
Classification: C25D,H05K,Y10T

Abstract:
1. A copper foil for a printed circuit with an electrodeposited ternary-alloy layer composed of copper, cobalt and nickel formed on a surface of the copper foil to be bonded to a resin substrate, wherein the electrodeposited layer has a surface comprising dendritic particles grown on and covering the copper foil surface, each of the dendritic particles having an outer edge defining an area, and wherein the dendritic particles of the electroplated layer consist of particles having outer edges each defining an area of 0.1 to 0.5 μm 2 dispersed on the surface of the electrodeposited layer at a density of 1000 particles/10000 μm 2 or less, particles having outer edges each defining an area exceeding 0.5 μm 2 dispersed on the surface of the electrodeposited layer at a density of 100 particles/10000 μm 2 or less, and a remainder of particles having outer edges each defining an area of less than 0.1 μm 2 on the surface of the electrodeposited layer.