The Ti/c-Si solid state reaction, II. additional measurements by means of RBS and AES

J.M.M. de Nijs, Arend van Silfhout

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Abstract

In a previous paper [Appl. Surface Sci. 40 (1990) 333], we have reported the results of a spectroscopic ellipsometric study of the c-Si/Ti solid state reaction. For this purpose we have grown and heated thin (≈10nm) Ti films on a clean c-Si substrate. The investigation revealed that already at moderate temperatures a metastable silicide (≈350°C), probably a monosilicide, and disilicide (≈450°C) are formed. These two metastable transition states, denoted by state I and II respectively, and the final disilicide (state III, ≈700°C) are additionally studied by means of a number of quantitative techniques, such as RBS, XPS and AES. The results reveal a Si-enriched monosilicide state I, Si: Ti = 1.2 and a stoichiometric but Si segregated disilicide state II; surface composition approximately TiSi3. The finally obtained disilicide (III) has recrystallized into probably large, flat islands embedded in a c-Si matrix.
Original languageUndefined
Pages (from-to)349-358
Number of pages0
JournalApplied surface science
Volume0
Issue number40
DOIs
Publication statusPublished - 1990

Keywords

  • IR-72820
  • METIS-128478

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