Selective epitaxial growth of Si 1-xGe x films via the alternating gas supply of Si 2H 6, GeH 4, and Cl 2: Effects of Cl 2 exposure

Sang Joon Park; Sunggi Baik; Hyugjun Kim

doi:10.1016/j.matlet.2012.08.036

Selective epitaxial growth of Si _1-xGe _x films via the alternating gas supply of Si ₂H ₆, GeH ₄, and Cl ₂: Effects of Cl ₂ exposure

Sang Joon Park, Sunggi Baik, Hyugjun Kim

Department of Electrical and Electronic Engineering

Research output: Contribution to journal › Article

Abstract

Si _1-xGe _x films were epitaxially grown on Si(0 0 1) substrates at various ratios of flow rates of Si ₂H ₆ and GeH ₄. Si _1-xGe _x films were also selectively grown on Si windows through modified alternating gas supply manner, repeating the unit cycle which consists of the Si _1-xGe _x growth step and Cl ₂ exposure step. Injection of Cl ₂ enhanced the selectivity of the selective growth of Si _1-xGe _x by etching away the spurious nuclei or deposits formed on oxide area. The separate addition of Cl ₂ resulted in decrease of the growth rate and Ge concentration of Si _1-xGe _x film. Meanwhile, Ge concentration in Si _1-xGe _x films was insignificantly affected by the variation of the flow rates and exposure durations of Cl ₂.

Original language	English
Pages (from-to)	89-92
Number of pages	4
Journal	Materials Letters
Volume	88
DOIs	https://doi.org/10.1016/j.matlet.2012.08.036
Publication status	Published - 2012 Dec 1

All Science Journal Classification (ASJC) codes

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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Park, S. J., Baik, S., & Kim, H. (2012). Selective epitaxial growth of Si _1-xGe _x films via the alternating gas supply of Si ₂H ₆, GeH ₄, and Cl ₂: Effects of Cl ₂ exposure. Materials Letters, 88, 89-92. https://doi.org/10.1016/j.matlet.2012.08.036

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abstract = "Si 1-xGe x films were epitaxially grown on Si(0 0 1) substrates at various ratios of flow rates of Si 2H 6 and GeH 4. Si 1-xGe x films were also selectively grown on Si windows through modified alternating gas supply manner, repeating the unit cycle which consists of the Si 1-xGe x growth step and Cl 2 exposure step. Injection of Cl 2 enhanced the selectivity of the selective growth of Si 1-xGe x by etching away the spurious nuclei or deposits formed on oxide area. The separate addition of Cl 2 resulted in decrease of the growth rate and Ge concentration of Si 1-xGe x film. Meanwhile, Ge concentration in Si 1-xGe x films was insignificantly affected by the variation of the flow rates and exposure durations of Cl 2.",

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AB - Si 1-xGe x films were epitaxially grown on Si(0 0 1) substrates at various ratios of flow rates of Si 2H 6 and GeH 4. Si 1-xGe x films were also selectively grown on Si windows through modified alternating gas supply manner, repeating the unit cycle which consists of the Si 1-xGe x growth step and Cl 2 exposure step. Injection of Cl 2 enhanced the selectivity of the selective growth of Si 1-xGe x by etching away the spurious nuclei or deposits formed on oxide area. The separate addition of Cl 2 resulted in decrease of the growth rate and Ge concentration of Si 1-xGe x film. Meanwhile, Ge concentration in Si 1-xGe x films was insignificantly affected by the variation of the flow rates and exposure durations of Cl 2.

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