Patent ID: 6479170
Filing Date: 2002-11-12
Classification: C22F,C25D,G01N,H05K,Y10S,Y10T

Abstract:
An electrodeposited copper foil providing improved bow and twist and dimensional stability to copper-clad laminates which: recrystallizes by heating at low temperature during production of a copper-clad laminate employing an electrodeposited copper foil; and exhibits an elongation as high as 18% or more in an atmosphere at 180Â° C., comprising selecting those copper foils whereinthe maximum rate of decrease in maximum tensile strength falls within an aging time ranging from 5 to 10 minutes during aging in an atmosphere at 170Â° C., and the change in tensile strength in a knick portion shown in a {tensile strength}vs. {aging time}curve drawn in an x-y plane is 3 kg/mm2or more.