Overview

SABRE has been proven to provide void-free copper fill of sub-0.15 micron trench features (at 9 or 10:1 aspect ratios) and 0.25 micron vias (at 5:1 aspect ratios). SABRE employs a proprietary electrofilling cell that eliminates the backside wafer contamination of copper, and features a unique plating cell design that ensures reproducibility of the copper fill, with a film uniformity of 3 sigma, [5% with a wafer. SABRE requires only two types of process modules to complete the electrofill process, for electrofilling (3 stations total) and the other for spin/rinse/dry (another 3 stations). The resulting simplicity of this design is key to the system's high reliability and manufacturing availability.