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Experimental evidence concerning the significant information depth of electron backscatter diffraction (EBSD).

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Electron backscatter diffraction (EBSD) can penetrate thin amorphous layers, with performance depending on voltage and software. This research explores the information depth for EBSD analysis in complex materials.

Keywords:
Amorphous SiElectron backscatter diffraction (EBSD)Information depthSi

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Area of Science:

  • Materials Science
  • Solid State Physics
  • Analytical Chemistry

Background:

  • Electron Backscatter Diffraction (EBSD) is a crucial technique for analyzing crystalline materials.
  • Understanding the information depth of EBSD is vital for accurate analysis, especially in multilayered or inhomogeneous samples.
  • Previous studies have not fully elucidated the penetration capabilities of EBSD through amorphous layers.

Purpose of the Study:

  • To investigate the information depth of EBSD when analyzing samples with amorphous layers.
  • To determine the influence of acceleration voltage and software settings on EBSD signal penetration.
  • To differentiate between core and maximum information depths in varying sample conditions.

Main Methods:

  • Experiments were conducted on samples with amorphous wedges on crystalline substrates and vice versa.
  • The acceleration voltage was varied to assess its impact on EBSD signal detection.
  • Software settings were adjusted to evaluate their effect on measurements through amorphous layers.

Main Results:

  • EBSD signals were detectable through approximately 142 nm of amorphous silicon.
  • Orientation measurements were feasible through approximately 116 nm of amorphous material at 30 kV.
  • The study highlights the complexity of information depth influenced by multiple parameters.

Conclusions:

  • EBSD can provide valuable crystallographic information even when analyzing samples with thin amorphous layers.
  • A distinction between 'core' and 'maximum' information depth is proposed to explain EBSD behavior in complex samples.
  • The findings are significant for nanoscale materials characterization and analysis of inhomogeneous samples.