A. Ermolieff et al., STUDY OF SIO2 SI INTERFACE STATES IN MOS DEVICES BY SURFACE-CHARGE SPECTROSCOPY - APPLICATION TO RAPID THERMAL NITRIDATION OF SILICON/, Journal of electron spectroscopy and related phenomena, 67(3), 1994, pp. 409-416
Surface charge spectroscopy (SCS) is investigated by X-ray photoelectr
on spectroscopy (XPS) and the results are compared with C(V) and G(V)
low frequency density of states data obtained on MOS capacitors, perfo
rmed using a SILO/RTN (sealed interface local oxidation of silicon/rap
id thermal nitridation) based isolation process. The surface density o
f states is found to be correlated to initial oxygen content at variou
s nitridation temperatures. Good agreement is obtained between both me
thods and metallic contamination measurements by secondary ion mass sp
ectroscopy (SIMS) for surface state density as low as 10(11) to 10(12)
cm-2 eV-1.