Copper electrolytic solution containing amine compound having specific skeleton and organosulfur compound as additives, and electrolytic copper foil produced using the same
View Patent ↗The invention has an object of obtaining a low-profile electrolytic copper foil made by electrolytic copper foil manufacturing using a cathode drum such that the surface roughness on the rough surface side (the opposite side to the lustrous surface) is low. In particular, the invention has an object of obtaining an electrolytic copper foil that can be finely patterned and have an excellent elongation and tensile strength at normal and high temperatures. This object is attained by using a copper electrolytic solution containing, as additives, an organosulfur compound, and an amine compound having a specific skeleton represented by undermentioned general formula (1) obtained by additively reacting an amine compound and a compound having one or more epoxy groups in a molecule thereof to an addition reaction. (In general formula (1), R1 and R2 are each selected from a group consisting of hydroxyalkyl groups, ether groups, aromatic groups, aromatic-substituted alkyl groups, unsaturated hydrocarbon groups, and alkyl groups, A represents an epoxy compound residue, and n represents an integer greater than or equal to 1.)
1. A copper electrolytic solution containing copper to be electrodeposited and, as additives, an organosulfur compound, and an amine compound having a specific skeleton represented by undermentioned wherein obtained by additively reacting an amine compound and the compound having one or more epoxy groups in a molecule thereof,
wherein R 1 and R 2 are each selected from the group consisting of hydroxyalkyl groups, ether groups, aromatic groups, aromatic-substituted alkyl groups, unsaturated hydrocarbon groups, and alkyl groups, A represents an epoxy compound residue, and n represents an integer greater than or equal to 1.
2. A copper electrolytic solution according to claim 1 , wherein the epoxy compound residue the of said amine compound having a specific skeleton has a linear ether linkage.
3. A copper electrolytic solution according to claim 1 , wherein said amine compound having the specific skeleton includes any of undermentioned wherein,
(n: an integer from 1 to 5)
, wherein n 1 is an integer from 1 to 5,
, wherein n 3 is an integer from 1 to 3 and R 1 and R 2 are each selected from the group consisting of hydroxyalkyl groups, ether groups, aromatic groups, aromatic-substituted alkyl groups, unsaturated hydrocarbon groups, and alkyl groups.
4. A copper electrolytic solution according to claim 1 , wherein said organosulfur compound is a compound represented by undermentioned wherein,
X—R 1 —(S) n —R 2 —YO 3 Z 1 (10)
R 4 —S—R 3 —SO 3 Z 2 (11)
, wherein R 1 , R 2 and R 3 are each an alkylene group having 1 to 8 carbon atoms, R 4 is selected from a group consisting of hydrogen,
, X is selected from the group consisting hydrogen, the sulfonic acid group, the phosphonic acid group, and sulfonic acid or phosphonic acid alkali metal salt groups or ammonium salt groups, Y is sulfur or phosphorus, Z 1 and Z 2 are each hydrogen, sodium or potassium, and n is 2 or 3.