Effect of crystallinity and preferred orientation of Ta2N films on diffusion barrier properties for copper metallization

Hung Chin Chung, Chuan Pu Liu

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

Tantalum nitride (Ta2N) films deposited at various substrate temperatures onto silicon (001) substrates can produce amorphous and crystalline phase with different preferred orientations. Subsequently, the viability of employing them as the diffusion barriers between copper and silicon is investigated by annealing at various temperatures for 30 min. The characterization of the thin films was carried out by four-point probe and X-ray diffraction. The results indicate that the thermal stability of Ta2N with Cu and Si are dependent on the crystallinity of Ta2N. Ta2N phase with the highest (002) preferred orientation exhibits the highest structural stability to prevent copper diffusion more effectively.

Original languageEnglish
Pages (from-to)3122-3126
Number of pages5
JournalSurface and Coatings Technology
Volume200
Issue number10 SPEC. ISS.
DOIs
Publication statusPublished - 2006 Feb 24

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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