Behavior of Viscous Liquid Byproduct Formed in Exhaust Tube by Silicon Carbide Epitaxial Growth. (16th December 2019)

• Record Type: Journal Article
• Authors: Mizushima, Ichiro; Habuka, Hitoshi
• Is Part Of: ECS journal of solid state science and technology. Volume 8:Number 12(2019)
• Page Start: P805
• Page End: P810
• Publication Date: 2019-12-16
• Subjects: Semiconductors -- byproduct -- chemical vapor deposition -- Silicon carbide; Solid state chemistry -- Periodicals; Electronics -- Materials -- Periodicals; Electrochemistry -- Periodicals; 541.0421
• DOI: 10.1149/2.0241912jss
• Languages: English
• ISSNs: 2162-8777

Abstract

Abstract : The behavior of the by-product produced in an exhaust tube by the semiconductor silicon carbide epitaxial growth process was evaluated. The by-product layer was a dark-colored viscous liquid; it captured precursor gases and gaseous by-products, such as hydrogen, monosilane, propane, hydrogen chloride and chlorosilanes. These captured gases were spontaneously emitted in ambient nitrogen at room temperature. By an etching process using a chlorine trifluoride gas at low concentrations in ambient nitrogen, the by-product layer could be safely decomposed to gaseous fluorides of silicon and carbon. After finishing the etching, there remained a small amount of residue which included particles of carbon, silicon carbide and related compounds. Based on these results, the by-product layer formation process was discussed.