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Updated: Jul 17, 2026
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Fabrication of Uniform Nanoscale Cavities via Silicon Direct Wafer Bonding
Published on: January 9, 2014
[Bonding structure in silicon nitride thin films containing silicon nano-particles]
Wen-ge Ding1, Wei Yu, Yan-bin Yang
1College of Physics Science and Technology, Hebei University, Baoding 071002, China.
Guang Pu Xue Yu Guang Pu Fen Xi = Guang Pu
|January 9, 2007
Summary
Non-stoichiometric hydrogenated amorphous silicon nitride (a-SiNx:H) films were developed using HWP-CVD. Annealing formed silicon nanocrystals, impacting microstructure and defect states, influenced by gas flow and hydrogen content.
Area of Science:
- Materials Science
- Thin Film Deposition
- Semiconductor Physics
Context:
- Non-stoichiometric hydrogenated amorphous silicon nitride (a-SiNx:H) is crucial for semiconductor devices.
- Understanding its microstructure and bonding is key to optimizing film properties.
- Helico-wave plasma-enhanced chemical vapour deposition (HWP-CVD) is a viable technique for a-SiNx:H deposition.
Purpose:
- To investigate the microstructural evolution and bonding characteristics of a-SiNx:H films.
- To correlate film properties with deposition parameters (gas flow ratio) and post-deposition annealing.
- To analyze the impact of excess silicon and hydrogen content on defect states.
Summary:
- a-SiNx:H films were deposited via HWP-CVD.
- Raman spectroscopy revealed amorphous silicon particles in as-deposited films, transforming into crystalline silicon nanocrystals upon annealing.
- FTIR and optical absorption spectra indicated that film microstructure is sensitive to gas flow ratio and annealing, affecting Si-H and N-H bonding densities and defect states at the silicon nanocrystal/SiNx interface.
Impact:
- The study elucidates the structure-property relationships in a-SiNx:H films.
- Optimizing deposition and annealing conditions can control silicon nanocrystal formation and defect density.
- Findings are relevant for advanced semiconductor device fabrication requiring tailored nitride thin films.
