Growth-rate-dependent laterally graded SiGe profiles on insulator by cooling-rate controlled rapid-melting-growth

Ryo Matsumura, Yuki Tojo, Masashi Kurosawa, Taizoh Sadoh, Ichiro Mizushima, Masanobu Miyao

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Laterally graded SiGe-on-insulator is the key-structure for next-generation Si-technology, which enables advanced device-arrays with various energy-band-gaps as well as 2-dimensional integration of functional-materials with various lattice-constants. Segregation kinetics in rapid-melting growth of SiGe stripes are investigated in wide ranges of stripe-lengths (10-500μm) and cooling-rates (10-19°C/s). Universal laterally graded SiGe-profiles obeying Scheil-equation are obtained for all samples with low cooling-rate (10°C/s), which enables robust designing of lateral-SiGe-profiles. For samples with high cooling-rates and long stripe-lengths, anomalous two-step-falling profiles are obtained. Dynamical analysis considering the growth-rate-effects enables comprehensive understanding of such phenomena. This provides the unique tool to achieve modulated lateral-SiGe-profiles beyond Scheil equation.

Original languageEnglish
Article number241904
JournalApplied Physics Letters
Volume101
Issue number24
DOIs
Publication statusPublished - Dec 10 2012

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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