In this investigation, Czochralski grown silicon (CZ-Si) was irradiate
d by a fast neutron which can introduce irradiated defects into silico
n and change the quality and density of point defects in silicon, by t
he interaction between irradiated defects and oxygen, the controlled p
recipitation of oxygen, and an excellent intrinsic gettering structure
in CZ-Si during heat treatment cycles can be obtained easily. (C) 199
4 American Institute of Physics.