3C-SiC Bulk Growth: Effect of Growth Rate and Doping on Defects and Stress
| Autor: | Ruggero Anzalone, Cristiano Calabretta, Massimo Zimbone, Marco Mauceri, Francesco La Via, Viviana Scuderi |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
inorganic chemicals
010302 applied physics Materials science Mechanical Engineering Doping technology industry and agriculture 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Stress (mechanics) Mechanics of Materials 0103 physical sciences General Materials Science Growth rate Composite material 0210 nano-technology |
| Zdroj: | Materials Science Forum. 1004:120-125 |
| ISSN: | 1662-9752 |
| DOI: | 10.4028/www.scientific.net/msf.1004.120 |
| Popis: | We report the study of the effect of the growth rate and of the doping on the stress and the defect density of a Cubic Silicon Carbide (3C-SiC) bulk layer grown at low temperature on a silicon substrate. After the growth process, the silicon substrate was melt inside the CVD reactor used for the deposition and then the intrinsic stress was measured by the curvature of the wafer without influence of the thermal stress between silicon and 3C-SiC. A considerable increase of the curvature was observed increasing the doping of the layer. The average stress is compressive and then produces a convex bow. At the same time, the average quality of the grown material deteriorates increasing the doping concentration. Using μ-Raman measurement in cross-section of the 3C-SiC grown samples, it was possible to observe the dependence of the stress and of the quality of the material as a function of the thickness and of the growth rate, due to the variation of the growth rate during the process. In particular, the increase of the growth rate produced both an increase of the stress and a decrease of the material quality. Furthermore, the increase of the doping concentration produced both an increase of the stress and a further deterioration of the crystal quality. |
| Databáze: | OpenAIRE |
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