Details

Autor(en) / Beteiligte

• Piluso, Nicolò
• La Via, Francesco
• Locke, Christopher
• Severino, Andrea
• Saddow, Stephen E.
• Anzalone, Ruggero
• Carballo, J.
• Volinsky, A.A.
• D'Arrigo, Giuseppe

Titel

Growth Rate Effect on 3C-SiC Film Residual Stress on (100) Si Substrates

Ist Teil von

• Materials science forum, 2010-01, Vol.645-648, p.143-146

Ort / Verlag

Trans Tech Publications Ltd

Erscheinungsjahr

2010

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• SiC is a candidate material for micro- and nano-electromechanical systems (MEMS and NEMS). In order to understand the impact that the growth rate has on the residual stress of CVD-grown 3C-SiC hetero-epitaxial films on Si substrates, growth experiments were performed and the resulting stress was evaluated. Film growth was performed using a two-step growth process with propane and silane as the C and Si precursors in hydrogen carrier gas. The film thickness was held constant at ~2.5 µm independent of the growth rate so as to allow for direct films comparison as a function of the growth rate. Supported by profilometry, Raman and XRD analysis, this study shows that the growth rate is a fundamental parameter for low-defect and low-stress hetero-epitaxial growth process of 3C-SiC on Si substrates. XRD (rocking curve analysis) and Raman spectroscopy show that the crystal quality of the films increases with decreasing growth rate. From curvature measurements, the average residual stress within the layer using the modified Stoney’s equation was calculated. The results show that the films are under compressive stress and the calculated residual stress also increases with growth rate, from -0.78 GPa to -1.11 GPa for 3C-SiC films grown at 2.45 and 4 µm/h, respectively.