Thermally Stable ZrN/Zr/n-GaN Ohmic Contacts

S. D. Wolter, B. P. Luther, S. E. Mohney, R. F. Karlicek, R. S. Kern

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Thermally stable ZrN(200 nm)/Zr (5 nm)/n-GaN ohmic contacts are reported. Specific contact resistances as low as 2 × 10-5 Ω cm2 are obtained after annealing in Ar at 1100°C for 1 min. Compared to previously reported TiN(200 nm)/Ti (5 nm)/n-GaN contacts, higher annealing temperatures are required to achieve ohmic behavior. This observation is attributed to slower reaction kinetics between Zr and GaN compared to Ti and GaN, as revealed by X-ray photoelectron spectroscopy depth profiles of annealed Zr/n-GaN and Ti/n-GaN contacts. The ZrN/Zr/n-GaN contacts exhibit excellent thermal stability during aging in evacuated quartz tubes at 600°C for 1000 h.

Original languageEnglish (US)
Pages (from-to)151-153
Number of pages3
JournalElectrochemical and Solid-State Letters
Volume2
Issue number3
DOIs
StatePublished - Mar 1999

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Electrochemistry
  • Electrical and Electronic Engineering

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