Selective metal-organic chemical vapor deposition growth of high quality GaAs on Si(001)

  • W. Guo
  • , L. Date
  • , V. Pena
  • , X. Bao
  • , C. Merckling
  • , N. Waldron
  • , N. Collaert
  • , M. Caymax
  • , E. Sanchez
  • , E. Vancoille
  • , K. Barla
  • , A. Thean
  • , P. Eyben
  • , W. Vandervorst

Research output: Contribution to journalArticlepeer-review

Abstract

High quality GaAs is selectively grown in 40 nm width Shallow Trench Isolation patterned structures. The patterned wafers have a V-shape Si (111) surface obtained by Tetramethylammonium hydroxide etching. By employing a SiCoNi™ pre-epi clean and two-step growth procedure (low temperature buffer and high temperature main layer), defects are effectively confined at the trench bottom, leaving a dislocation-free GaAs layer at the upper part. The high crystal quality is confirmed by transmission electron microscopy. Scanning spreading resistance microscopy indicates a high resistance of GaAs. The process conditions and GaAs material quality are highly compatible with Si technology platform.

Original languageEnglish
Article number062101
JournalApplied Physics Letters
Volume105
Issue number6
DOIs
Publication statusPublished - 11 Aug 2014
Externally publishedYes

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