Patent ID: 6790763
Filing Date: 2004-09-14
Classification: B24B,C23C,C25D,H01L

Abstract:
A method of filling a metal in fine trenches in a surface of a substrate, comprising:forming a barrier layer on the substrate, and a seed layer on the barrier layer; providing an electroplating apparatus having a first substrate holder for holding the substrate, a plating bath containing a plating liquid, an anode, and a virtual anode to adjust electromagnetic field; providing a polishing apparatus having a second substrate holder for holding the substrate to press the substrate against a polishing surface at different pressures at a central portion and a peripheral portion of the substrate; transferring the substrate with the barrier layer and the seed layer to the electroplating apparatus; holding the substrate in the first substrate holder and placing the substrate in the plating liquid; generating electromagnetic field; filling a first metal in the trenches and forming a plated film of the first metal on an entire surface of the substrate by electroplating, wherein the electromagnetic field is adjusted by the virtual anode so that differences of thickness of the plated film between the central portion and the peripheral portion of the substrate being minimized; removing the substrate from the plating bath; washing and drying the substrate in the electroplating apparatus; transferring the substrate to the polishing apparatus; holding the substrate in the second substrate holder; polishing and removing the plated film by pressing the substrate to the polishing surface, wherein the pressures pressing the substrate to the polishing surface at a central portion and a peripheral portion are adjusted; washing and drying the substrate in the polishing apparatus; and transferring the substrate from the polishing apparatus.