Growth of ge crystals with extremely low dislocation density

Toshinori Taishi, Ichiro Yonenaga

研究成果: Chapter


Germanium (Ge) single crystals with an extremely low density of or almost free from grown-in dislocations were grown by the Czochralski technique using boron oxide (B2O3) and a silica crucible, where generation of GeO2 particles, harmful for dislocationfree crystal growth, was effectively suppressed by the partially-or fully-coverage of the melt surface with B2O3 liquid. In a further evolution of the above growth technique, Ge crystals with various concentrations of interstitially dissolved oxygen atoms up to 5.5 × 1017 cm-3, two orders higher than that in a conventionally grown Ge crystals, were grown by full coverage of the Ge melt surface with B2O3 liquid and addition of GeO2 powder. The effective segregation coefficient of oxygen atoms was estimated to be 1.0-1.4. These Ge crystals are expected for application as high quality and thermo-mechanically stable materials, free from grow-in dislocations, for high-speed ULSI devices and GaAs solar cell substrates.

ホスト出版物のサブタイトルProperties, Production and Applications
出版社Nova Science Publishers, Inc.
出版ステータスPublished - 2012 12 1

ASJC Scopus subject areas

  • Chemical Engineering(all)

フィンガープリント 「Growth of ge crystals with extremely low dislocation density」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。