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Determination of amorphous layer thickness in ion-implanted silicon using secondary ion-mass spectrometry. Technical report

Technical Report ·
OSTI ID:6045359
Secondary ion mass spectrometry was used to study boron-doped Si (100) that was rendered amorphous by the implantation of /sup 75/As. Using oxygen bombardment and negative secondary ion detection, all secondary ion species show a shift in ion energy of greater than 2 eV upon sputtering through the amorphous layer and into the underlying crystalline silicon. After regrowth of the same specimens by rapid thermal annealing, the secondary-ion energy shift occurs significantly deeper, at approximately the p-n junction. In both specimens, the energy shift was shown to be due to bombardment-induced specimen charging. Thus, the thickness of the amorphous layer in the As-implanted specimen can be determined by profiling with a narrow secondary-ion energy window. Mechanisms for this effect are discussed.
Research Organization:
Cornell Univ., Ithaca, NY (USA). Baker Lab.
OSTI ID:
6045359
Report Number(s):
AD-A-183225/2/XAB; TR-23
Country of Publication:
United States
Language:
English