With devices being scaled down to the nanometer regime, the need for atomic thickness control with high conformality is increasing. Atomic layer deposition (ALD) is a key technology enabler of nanoscale memory and logic devices owing to its excellent conformality and thickness controllability. Plasma-enhanced ALD (PE-ALD) allows deposition at significantly lower temperatures with better film properties than in conventional thermal ALD. These benefits make PE-ALD more attractive for nanoscale device fabrication. In this paper, the basic characteristics and film properties of PE-ALD processes will be reviewed, focusing on the application of PE-ALD in key components of nanoscale device fabrication: gate oxides, Cu interconnects, and nanoscale contacts.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)