Abstract:
A composition includes a solvent; a metal ion disposed in the solvent; an accelerator disposed in the solvent; and a suppressor disposed in the solvent, a pH of the composition being alkaline and effective to form a superconformation comprising a damascene deposit that includes an electrochemically reduced form of the metal ion. A process for forming a superconformation includes: contacting a substrate with a composition, the composition including: a solvent; a metal ion disposed in the solvent; an accelerator disposed in the solvent; and a suppressor disposed in the solvent; controlling a pH of the composition to be alkaline; and producing a damascene deposit on the substrate to form the superconformation, the damascene deposit including an electrochemically reduced form of the metal ion.