Near-equilibrium growth of thick, high quality beta-SiC by sublimation

Abstract
A close spaced near‐equilibrium growth technique was used to produce thick, high quality epitaxial layers of beta‐silicon carbide. The process utilized a sublimation method to grow morphologically smooth layers. The beta silicon carbide growth layers varied from about 200 to 750 μm in thickness. Chemical vapor deposition grown, 2–10 μm, beta silicon carbide films were used as seeds at 1860 and 1910 °C growth temperatures. The respective average growth rates were 20 and 30 μm per hour. The layers are p‐type with a 3.1×1017 cm−3 carrier concentration. Electrical measurements indicate considerable improvement in the breakdown voltage of Schottky barriers on growth samples. Breakdown values ranged from 25 to 60 V. These measurements represent the highest values reported for 3C‐SiC.