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Portrait of Erik Lind; Photo: Kennet Ruona

Erik Lind

Professor, Coordinator Nanoelectronics & Nanophotonics

Portrait of Erik Lind; Photo: Kennet Ruona

InAs epitaxial lateral overgrowth of W masks

Author

  • Lars-Erik Wernersson
  • Erik Lind
  • J Lembke
  • B Martinsson
  • Werner Seifert

Summary, in English

The conditions for successful epitaxial lateral overgrowth of W patterns by InAs using low-pressure metalorganic vapour phase epitaxy were studied. The substrates used were InAs (0 0 1) wafers and the range of growth temperatures between 500 and 600 degrees C. The selective growth was investigated as a function of the V/III-ratio on W-ring test structures and wires oriented in different directions. 100-nm-wide wires, oriented in 30 degrees off from the [1 1 0]-direction, were completely covered with InAs without any void formation and the surface was planarized after deposition of 3 50 nm at the V/III-ratio of 14. Wires oriented along the [1 1 0]-direction were found to effectively block the lateral overgrowth by the formation of mesa ridges limited by {110} and {111} A-planes for V/III-ratios between 14 and 56. All other grating directions showed limited lateral growth. This observed orientation dependence is in general agreement with the overgrowth of GaAs, but shows differences compared to InP.

Department/s

  • Solid State Physics
  • Department of Electrical and Information Technology

Publishing year

2005

Language

English

Pages

81-86

Publication/Series

Journal of Crystal Growth

Volume

280

Issue

1-2

Document type

Journal article

Publisher

Elsevier

Topic

  • Electrical Engineering, Electronic Engineering, Information Engineering
  • Condensed Matter Physics

Keywords

  • W/InAs
  • InAs
  • MOVPE
  • selective area growth
  • W/GaAs
  • W/InP

Status

Published

ISBN/ISSN/Other

  • ISSN: 0022-0248