METHOD OF DRYING COPPER FOIL AND COPPER FOIL DRYING APPARATUS

摘要

PURPOSE: The method dries a copper foil(1) after surface treatment with low power consumption and controls the surface heating of the copper foil to maintain the drying temperature above 100°C to form an eutectic alloying of a passivation metal and the copper foil. CONSTITUTION: The method dries the copper foil by irradiating a near infrared ray at least on one side of the copper foil after the surface treatment. The surface treatment includes a nodularization and a passivation. The copper foil is an electrodeposited copper foil. The method improves the acid resistance and a delamination strength by increasing the adhesion force to a resin substrate and prevents the copper foil from being separated from the resin substrate. The nodularization is performed by depositing a particle on the surface of the copper foil and a near infrared ray is irradiated to the surface of the copper foil.