Method of drying copper foil and copper foil drying apparatus
AssigneeMitsui Mining & Smelting Co., Ltd.
InventorsNobuyuki Imada, Kazuhide Oshima
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Abstract
A method employed to dry a copper foil having been subjected to various surface treatments, which method comprises irradiating at least one surface-treated side of the copper foil with near infrared rays to dry the copper foil, and an apparatus suitable to the method. The drying of the copper foil having undergone surface treatments can be accomplished by a simple apparatus with low electric power while controlling the heating of the surface of the copper foil so that the drying temperature can be held at 100° C. or higher at which a eutectic alloying of rust preventive metal and copper foil, for example, alloying (brass formation) of zinc and copper on the surface of the copper foil is effected.
Claims11
A method of drying a copper foil after nodularization and passivation surface treatments, comprising irradiating one surface or both surfaces of the copper foil with near infrared irradiation to thereby dry water from the copper foil after said surface treatments.
Dependencies are inferred from the claim text.