Solid-phase epitaxial regrowth of Sb-implanted Si1-xGe x strained layers: Kinetics and electrical properties

Z. Atzmon*, M. Eizenberg, Y. Shacham-Diamand, J. W. Mayer, F. Schäffler

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Kinetics and electrical properties of solid-phase epitaxial regrown (SPEG) layers of Sb-implanted strained Si1-xGex alloys are reported. Two sets of Si1-xGex epilayers with compositions of x=0.08 and 0.18, molecular beam epitaxy grown on Si(100) substrates, were implanted at room temperature with Sb+ ions at an energy of 200 and 100 keV, respectively, and doses of 1014 and 1015 ions/cm2. A set of Si(100) samples was also implanted as a reference. The samples were annealed at temperatures of 525, 550, and 575°C for durations between 5 s and 10 min. For the higher-dose Sb-implanted Si 0.92Ge0.08 layer (1015 cm-2) ion backscattering measurements in the channeling mode show a decrease in the regrowth rate compared to Sb-implanted Si(100). The activation energy of the SPEG process for the Si0.92Ge0.08 alloy was 2.9±0.2 eV, higher than the value of 2.4±0.2 eV obtained for pure Si. For the alloy with 18% Ge the SPEG rate for the 1015 cm-2 dose was much smaller compared to the sample with 8% Ge. For the lower-dose implantation (1014 cm-2) the regrowth rates for Si 0.92Ge0.08 and pure Si were very close, and the activation energies were 2.8±0.2 and 2.7±0.2, respectively. It was also found that the SPEG rate in a rapid thermal annealing was significantly higher than that for a sample heated in a conventional furnace.

Original languageEnglish
Pages (from-to)3936-3943
Number of pages8
JournalJournal of Applied Physics
Volume75
Issue number8
DOIs
StatePublished - 1994
Externally publishedYes

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