Enhancement of integrity of polysilicon oxide by using a combination of N2O nitridation and CMP process

Abstract

This work prepares and demonstrates, for the first time, a high-quality polysilicon oxide, by combining N2O nitridation and Chemical Mechanical Polishing (CMP) process. Our results demonstrate that capacitors with this process have an improved Q(bd) (charge-to-breakdown) due to the planar surface and more concentrated nitrogen at the interface of polysilicon oxide.