Patent ID: 8372744
Filing Date: 2013-02-12
Classification: C25D,H01L,Y10T

Abstract:
1. 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