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

Claim 12:
13. 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 consisting essentially of:
i) copper salt;
ii) a source of halide;
iii) a linear or branched polyhydroxyl, wherein the linear or branched polyhydroxyl comprises a reaction product between 2,3-epoxy-1-propanol and aminic alcohol or ammonium alcohol and
iv) an acid;
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 a copper deposit having a high density of nanotwinned columnar copper grains is deposited on the substrate.