Thin silicon nitride (Six) layers have been successfully prepared by photochemical vapor deposition (photo-CVD) technique. Ellipsometric and X-ray photoelectron spectroscopic studies prove that the refractive index and concentration of nitrogen in the layer are strongly dependent on the substrate temperature. The interface state density at the SiNx/InP interface is estimated to be 8×1011 cm-2 eV-1 from the capacitance-voltage characteristics of InP MIS diodes. Using SiNx layer as a gate insulator, InP MISFET's were fabricated on semi-insulating InP substrates.
ASJC Scopus subject areas
- Physics and Astronomy(all)