Nitrogen related doping with implant Si3N4 formation in Si

Abstract
A heavily conducting region has been observed on implanting nitrogen into silicon for forming a buried dielectric layer. The conduction predominantly occurs in the surface silicon layer adjacent to the higher nitrogen content isolating region. The doping, ≳1018 cm3 and exceeding previously observed nitrogen related doping, is relatively stable at customary 1150–1200 °C processing temperatures and its elimination requires annealing ≳1300 °C.