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August 14, 2026Journal of Applied Physics

Pressure-dependent electron heating and discharge localization in an electronegative CF4 ICP reactor with RF substrate bias

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Authors

ZCZhaoyu ChenUnited States Department of Energy ZCZili ChenNanjing Agricultural University YWYu WangHuazhong University of Science and Technology

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Implication

Computational modeling demonstrates pressure-driven discharge localization and electron depletion in electronegative CF4 plasma reactors, highlighting kinetic decoupling of electron populations.

Key Points

Investigate the kinetic mechanisms driving pressure-dependent electron heating and discharge localization in an electronegative CF4 inductively coupled plasma reactor with RF substrate bias.
Implemented a two-dimensional axisymmetric direct-implicit particle-in-cell/Monte Carlo collision (PIC/MCC) simulation.
Evaluated plasma behavior across gas pressures ranging from 20 to 200 mTorr under fixed absorbed inductive and RF bias powers.
Increasing pressure from 20 to 200 mTorr transforms the discharge from diffuse to strongly localized near the dielectric window, leaving the downstream bulk electron-depleted.
Elevated pressure confines energetic electrons to the inductive heating zone via rapid collisional cooling during transport.
Demonstrated spatial decoupling between ionization concentrated near the window and dissociative electron attachment spread over the surrounding volume.

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Chen et al. (2026) studied this question.

synapsesocial.com/papers/6a7ec78db70b84ec8b914067 https://doi.org/10.1063/5.0343176

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Implication

Computational modeling demonstrates pressure-driven discharge localization and electron depletion in electronegative CF4 plasma reactors, highlighting kinetic decoupling of electron populations.

Pressure-dependent electron heating and discharge localization in an electronegative CF4 ICP reactor with RF substrate bias

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Implication

Key Points

Cite This Study

Pressure-dependent electron heating and discharge localization in an electronegative CF4 ICP reactor with RF substrate bias

Discussion

Member takes

Implication

Key Points

Cite This Study

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