Low-temperature deposition of diamond using chloromethane in a hot-filament chemical vapor deposition reactor

Franklin Chau Nan Hong, Jing Chuang Hsieh, Jih Jen Wu, Gou Tsau Liang, Jen Haw Hwang

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Chloromethanes (CH2Cl2, CHCl3 and CCl4) were used as carbon sources to grow diamond at low temperature (from 380°C to 700°C). In comparison with methane, which is inefficient at growing diamond below 600°C, chloromethane was quite suitable for the growth of diamond films at low temperature. Diamond growth was possible even at 380°C, which was the lowest temperature possible in the system utilized here, using CCl4 reactant. Scanning electron micrographs, X-ray diffraction patterns and Raman spectra confirmed the presence of diamond crystallites. However, the growth rate at 380°C was only 0.05 μm h-1. Improved growth rates were achieved with hydrogen passing through the hot-filament and carbon source gas bypassing the filament (bypass configuration). The growth rate of diamond was indeed enhanced very significantly using chloromethane in the bypass configuration. However, problems such as non-uniform growth and a narrow range of possible growth parameters arose using the bypass configuration. In contrast, the growth rate was not enhanced by using methane in the bypass configuration. The advantages of chloromethane are demonstrated. Possible reasons for such advantages are also discussed.

Original languageEnglish
Pages (from-to)365-372
Number of pages8
JournalDiamond and Related Materials
Volume2
Issue number2-4
DOIs
Publication statusPublished - 1993 Mar 31

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Chemistry(all)
  • Mechanical Engineering
  • Physics and Astronomy(all)
  • Materials Chemistry
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Low-temperature deposition of diamond using chloromethane in a hot-filament chemical vapor deposition reactor'. Together they form a unique fingerprint.

Cite this