Patent ID: 11873568
Assignee: MACDERMID ENTHONE INC.
Field: Surface technology, coating (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 0:
1. A method of electrodepositing copper on a surface of a substrate, the method comprising the steps of:
a. contacting the surface of the substrate and at least one anode with a copper electroplating solution comprising:
i) a copper salt;
iii a source of halide ions; and
iii) a linear or branched polyhydroxyl;
wherein the copper electroplating solution is at least substantially free of any accelerator, brightener, carrier, wetter, or leveler or any compound that can function as an accelerator, brightener, carrier, wetter, or leveler, other than the linear or branched polyhydroxyl;

b. applying an electric voltage between the surface of the substrate and the at least one anode such that cathodic polarity is imposed upon the substrate relative to the at least one anode;
wherein the electric voltage has a current density in the range of about 1 to about 10 ASD;
wherein the copper electroplating solution is mixed at about 50 to 400 rpm; and
wherein a copper deposit having greater 80% nanotwinned columnar copper grains is deposited on the substrate.