METHOD FOR MANUFACTURE OF ELECTROLYTIC COPPER FOIL, ELECTROLYTIC COPPER FOIL MANUFACTURED BY THE METHOD, SURFACE-TREATED COPPER FOIL MANUFACTURED USING THE ELECTROLYTIC COPPER FOIL, AND COPPER-CLAD LAMINATE MANUFACTURED USING THE ELECTROLYTIC COPPER FOIL OR SURFACE-TREATED COPPER FOIL

摘要

Disclosed is a method for manufacture of an electrolytic copper foil having a lower profile compared to a conventional, commercially available low-profile electrolytic copper foil and also having excellent mechanical strength, with good efficiency. The method may comprise electrolyzing a sulfate-type copper electrolyte solution containing a quaternary ammonium salt polymer having a cyclic structure and a chlorine to form the electrolytic copper foil, wherein the quaternary ammonium salt polymer to be added to the sulfate-type copper electrolyte solution is a DDAC polymer composed of two or more monomer units. Preferably, the quaternary ammonium salt polymer is a diaryldimethylammonium chloride having a number average molecular weight of 300 to 10000. Preferably, the sulfate-type copper electrolyte solution comprises bis(3-sulfopropyl)disulfide or 3-mercapto-1-propanesulfonic acid which has a mercapto group.