Solution-based formation of high-quality gate dielectrics on epitaxial graphene by microwave-assisted annealing

Kwan Soo Kim, Goon Ho Park, Hirokazu Fukidome, Tetsuya Suemitsu, Taiichi Otsuji, Won Ju Cho, Maki Suemitsu

Research output: Contribution to journalArticlepeer-review

Abstract

We propose a damage-free formation method for high-quality gate dielectrics on epitaxial graphene (EG), which involves solution-based Al2O3 coating combined with microwave-assisted annealing (MW-sol-Al2O3). This method substantially preserves the pristine properties of EG with minimized hole doping and strain induction. The MW-sol-Al2O3 showed a surface roughness of >0.237nm and a dielectric constant of 7.5. A leakage current of 8.7 ' 10%6A/cm2, which is 3 orders of magnitude smaller than that of natural Al2O3 at the same electric field, was obtained. These excellent MW-sol-Al2O3 properties are ascribed to the effective elimination of hydroxyl- and carboxyl-related components from the film by microwave-assisted annealing.

Original languageEnglish
Article number06GF09
JournalJapanese journal of applied physics
Volume56
Issue number6
DOIs
Publication statusPublished - 2017 Jun

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Solution-based formation of high-quality gate dielectrics on epitaxial graphene by microwave-assisted annealing'. Together they form a unique fingerprint.

Cite this