Effect of a radiation shield on melt/crystal interface shape and pull rate of silicon CZ puller

Takao Tsukada, Nobuyuki Imaishi, Mitsunori Hozawa

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

For a silicon CZ crystal puller, the effect of an annular radiation shield on the temperature profile in the melt and crystal and on the shape of the melt/crystal interface was studied theoretically by use of the finite element analysis based on the conduction-dominated model. It was found that a radiation shield of an appropriate shape and located at an optimum position in the furnace can make the interface shape less convex to the crystal and can reduce the input power to the furnace at all stages of crystal growth in comparison with operation without a shield. Also, use of a radiation shield increases the pull rate, i.e. the productivity of the CZ puller, because the axial temperature gradient near the melt/crystal interface becomes steeper.

Original languageEnglish
Pages (from-to)381-387
Number of pages7
JournalJOURNAL of CHEMICAL ENGINEERING of JAPAN
Volume21
Issue number4
DOIs
Publication statusPublished - 1988

Keywords

  • Crystal Growth Silicon Czochralski Method Radiation Shield
  • Heat Conduction Radiation
  • Interface Shape
  • Numerical Simulation

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

Fingerprint

Dive into the research topics of 'Effect of a radiation shield on melt/crystal interface shape and pull rate of silicon CZ puller'. Together they form a unique fingerprint.

Cite this