Hydrogen coverage during Si growth from SiH4 and Si2H6

Abstract
Time‐of‐flight direct recoiling (DR) measurements of surface hydrogen coverage (θH) are made in situ during chemical beam epitaxy growth of Si from Si2H6 on Si(100) as a function of temperature and disilane flux. Temperatures (T) of 300–900 °C and fluxes from 1015 to 1017 molecules cm−2 s−1 are used. Limited data for SiH4 are also presented. Predictions of θH from a steady state kinetic model are compared with the measurements, enabling the reactive sticking probability (S) of Si2H6 to be estimated at T≳500 °C.