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The effect of rotation on the macro-steps formation during 4H-SiC solution growth

  • Journal of the Korean Crystal Growth and Crystal Technology
  • Abbr : J. Korean Cryst. Growth Cryst. Technol.
  • 2019, 29(6), pp.294-297
  • DOI : 10.6111/JKCGCT.2019.29.6.294
  • Publisher : The Korea Association Of Crystal Growth, Inc.
  • Research Area : Engineering > Materials Science and Engineering
  • Received : October 23, 2019
  • Accepted : November 26, 2019
  • Published : December 31, 2019

SHIN Yunji 1 park tae yong 1 Si-Young Bae ORD ID 1 Seongmin Jeong ORD ID 1

1한국세라믹기술원

Accredited

ABSTRACT

New insights about macro-step formation has been investigated. The phenomena of surface instability caused bythe interaction between step flow and fluid flow was describe in mechanical way. The rotation of the seed crystal in aclockwise direction was applied with a speed varied from 30 to 200 rpm during the TSSG process on the Si- and C-faces4H-SiC. The macro-steps were formed along the two specific directions at different locations on the crystal for each, i.e.,[10-10] or [01-10] directions or both. From the results, it is suggested that the macro-steps were generated from the microstepsby interaction between step flow and fluid flow during the rotation of seed crystal. Furthermore, The fluid flow couldbe effective to control the micro- and/or macro-step behavior during solution growth.

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