Patent ID: 8372744

Claim:
A process for fabricating a contact rhodium structure which comprises obtaining a substrate having a dielectric layer thereon, wherein the dielectric layer has cavities therein into which the contact rhodium is to be deposited; depositing a seed layer in the cavities and on the top surface of the dielectric layer outside of the cavities; and depositing the rhodium by electroplating from a bath comprising a rhodium salt; an acid and a stress reducer, wherein the stress reducer is at least one member selected from the group consisting of a halide, a complex of rhodium sulfate having bridged bidentate sufphato groups, a sulfamic acid, a sulfonic acid, a combination of an aluminum ion a dicarboxylic or polycarboxylic acid, and an alcohol; and then annealing the structure, wherein the electroplating comprises an initial current density of about 0.1 milliamps/cm 2 to about 5 milliamps/cm 2 for about 1 to about 20 seconds followed by a ramping up of the current density in about 5 to about 120 seconds and a higher current density of about 1 to about 100 milliamps/cm 2 for about 60 seconds to about 60 minutes plate to the desired thickness.