Journal
JOURNAL OF APPLIED PHYSICS
Volume 90, Issue 10, Pages 5058-5063Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1412579
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Experiments have demonstrated that nitridation provides critically important improvements in the quality of SiO2-SiC interface. This article provides results and analysis aimed at developing the much needed understanding of the mechanisms and effects associated with both annealing of pregrown oxides and direct growth in NO and N2O environments. According to the model proposed in the article, nitridation plays a double role: (1) creation of strong Si equivalent toN bonds that passivate interface traps due to dangling and strained bonds, and (2) removal of carbon and associated complex silicon-oxycarbon bonds from the interface. This understanding of the effects of nitridation is experimentally verified and used to design a superior process for gate oxide growth in the industry-preferred N2O environment. (C) 2001 American Institute of Physics.
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