High-quality heteroepitaxial Ge growth on nano-patterned Si templates using diblock copolymer patterning

J. Lee, K. L. Wang, H. T. Chen, L. J. Chen

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

In this paper, we investigated the heteroepitaxial germanium (Ge) growth on a nano-patterned Si substrate using a diblock copolymer self-patterning process, which provides approximate 10-nm-diameter holes and 20 nm distances in lateral scale. A 300-nm-thick pure Ge film was grown by solid source molecular beam epitaxy (MBE) and the epitaxial film was characterized by AFM, SEM, TEM, μ-Raman spectroscopy and etched pit dislocation (EPD) measurements. The results show that rms surface roughness was improved by 22.5% for the growth on nano-patterned templates and the epitaxial layer exhibited a fully relaxed single-crystalline structure. One-order reduction in etch pit density was achieved for the growth on the nano-patterned templates.

Original languageEnglish
Pages (from-to)330-334
Number of pages5
JournalJournal of Crystal Growth
Volume301-302
Issue numberSPEC. ISS.
DOIs
Publication statusPublished - 2007 Apr

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry

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