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Modeling of Gate Stack Patterning for Advanced Technology Nodes: A Review.

Xaver Klemenschits1, Siegfried Selberherr2, Lado Filipovic3

  • 1Institute for Microelectronics, Technische Universität Wien, Vienna 1040, Austria. klemenschits@iue.tuwien.ac.at.

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Summary
This summary is machine-generated.

Technology computer-aided design (TCAD) is crucial for advancing semiconductor fabrication. This review covers TCAD methods for modeling molecular transport, surface chemistry, and gate stack patterning to overcome material and fabrication limitations.

Keywords:
fin field effect transistor (FinFET)high-klevel setmetal gate stackmetal oxide semiconductor field effect transistor (MOSFET)technology computer-aided design (TCAD)topography simulation

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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Computer-Aided Design

Background:

  • Semiconductor device dimensions are shrinking, necessitating advanced materials and fabrication techniques.
  • Modern metal gates involve complex material stacks and multiple processing steps for stable operation.
  • Understanding underlying mechanics is vital for predicting new methods and materials.

Purpose of the Study:

  • To review fundamental methods in technology computer-aided design (TCAD) for semiconductor fabrication.
  • To discuss benefits and limitations of TCAD techniques for topology changes, molecular transport, and surface chemistry.
  • To highlight recent advances in modeling gate stack patterning and identify areas for future research.

Main Methods:

  • Numerical particle ray tracing for modeling molecular transport in the feature scale.
  • Modeling of surface chemistries to identify dominant etch mechanisms.
  • Advanced geometric modeling for gate stack patterning in the feature scale.

Main Results:

  • Review of TCAD methods for topology change description, including benefits and limitations.
  • Analysis of limitations imposed by particle ray tracing on chemical modeling.
  • Presentation of recent advances in modeling surface chemistries and gate stack patterning.

Conclusions:

  • TCAD is essential for overcoming fundamental limitations in semiconductor device fabrication.
  • Current TCAD methods for molecular transport and surface chemistry have limitations impacting chemical modeling.
  • Further research is needed to overcome limitations in advanced gate stack patterning models.