Silicon nanodot arrays patterned using diblock copolymer templates

Gil Bum Kang, Seong Il Kim, Young Hwan Kim, Yong Tae Kim, Jung Ho Park

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Dense and periodic arrays of holes and Si nano dots were fabricated on silicon substrate. The holes were approximately 20-40 nm wide, 40 nm deep and 40-80 nm apart. To obtain nano-size patterns, self-assembling resists were used to produce layer of hexagonally ordered parallel cylinders of polymethylmethacrylate (PMMA) in polystyrene (PS) matrix. The PMMA cylinders were degraded and removed with acetic acid rinse to produce a PS. 10 nm-thick Au thin film was deposited by using electron beam evaporator. PS template was removed by lift-off process. Arrays of Au nano dot were transferred by using fluorine-based reactive ion etching. Au nano dots were removed by sulfuric acid. Si nano dots size and height were 24-70 nm and 20-30 nm respectively. Sequential oxidation-wet etching method reduced size of Si nano dots. Reduced sized silicon nano dots diameter and height were 18 nm and 12 nm, respectively. Nanopatterned holes sizes were observed by field emission scanning electron microscope (FESEM) and atomic force microscopy.

Original languageEnglish
Pages (from-to)524-529
Number of pages6
JournalJournal of Electroceramics
Volume23
Issue number2-4
DOIs
Publication statusPublished - 2009 Oct

Keywords

  • Copolymer lithography
  • Diblock copolymer
  • Nanotemplate
  • Reactive ion etching
  • Si nano dot

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Mechanics of Materials
  • Electrical and Electronic Engineering
  • Materials Chemistry

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