Growth Of Single Crystalline Silicon Carbide On Aluminum Nitride By Chemical Vapor Deposition

Download or read book Growth of Single Crystalline Silicon Carbide on Aluminum Nitride by Chemical Vapor Deposition written by Payam Shoghi and published by . This book was released on 2008 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: Crystalline layers of SiC were grown on A1N substrate using chemical vapor deposition (CVD) from a single gas source; Trimethylsilane as well as a combination of ethylene (C[subscript]2H[subscript]4), silane (SiH[subscript]4), and hydrogen (H[subscript]2) gas. The growth was conducted at temperatures ranging from 1100 to 1350[degrees]C and pressures ranging from 0.09 torr to l.86 torr. The study was conducted on AlN grown on sapphire as well as on polycrystalline AlN substrates. The CVD growth system, which was made by OSEMI, was designed to operate in wide range of pressures (10[superscript]-8 to atmospheric) and temperatures (room temperature to -2000[degrees]C) using RF heating. The system is integrated with a molecular beam epitaxy (MBE) unit to enable direct transfer of A1N layers, grown by MBE, into the CVD system. X-ray measurements, carried out using PANalytical X'Pert X-ray diffraction system demonstrated growth of single crystalline SiC while surface morphology was examined using Scanning Electron Microscopy (SEM) and Atomic Force Microscope (AFM), qualitative measure of the layers' stoichiometry was carried out using Energy Dispersive X-ray examination using conventional EDAX. The formation of single crystalline 3C-SiC was confirmed by X-ray diffraction. Atomic force microscopy (AFM) showed an increase in the roughness of the morphology for thick cubic SiC on A1N on Sapphire substrate. SEM and EDAX measurements showed the thickness of the SiC thin film and the ratio of Si and C atoms in the film.