ESR characterization of the top Si layer of ion implanted SIMOX

Electron spin resonance ESR.method was used to investigate defects produced in SIMOX by Asqand Bqion implantation. Two kinds of paramagnetic defect centers were observed. One had a g-value of 2.0055 and DHpps 7.0 Oe, due to a-center, which originated from Si dangling bonds at the amorphous layer. The other had a g-value of 2.0010 and DHpps2.8 Oe, due to EX-center in the SiO2 layer. These centers showed different annealing properties. The existence of an amorphousrcrystalline layer at the top Si layer plays an important role for the recrystallization mechanism. However, recrystallization at the moving crystalline layer by annealing depends highly on the ion species as well as the implantation energy. q2000 Elsevier Science B.V. All rights reserved.