High Purity (5N) Single Crystal Silicon Electrode with Customizable Gas Hole Diameter and Multiple Resistivity Options for Semiconductor Plasma Systems
The High-Purity Single Crystal Silicon Electrode is a semiconductor-grade plasma chamber component designed for use in advanced etching, deposition, and surface modification equipment. Manufactured from ultra-clean single crystal silicon (5N purity), it provides stable electrical performance, excellent plasma compatibility, and precise gas/electric field control in critical semiconductor processes.
As a core consumable inside plasma reactors, silicon electrodes directly influence plasma density, uniformity, and wafer process consistency. Their material compatibility with silicon-based manufacturing environments also helps minimize cross-contamination risk, making them a widely adopted standard in semiconductor fabs.
Role of Silicon Electrodes in Plasma Systems
In semiconductor plasma equipment (ICP, RIE, PECVD, CVD), silicon electrodes function as:
- Plasma generation and stabilization components
- RF and electric field distribution interfaces
- Gas flow and plasma uniformity regulators
- Chamber internal structural elements
During operation, electrodes are continuously exposed to:
- High-energy ion bombardment
- Fluorine-based gases (CF₄, SF₆, NF₃)
- Chlorine-based chemistries (Cl₂, HBr)
- Elevated thermal conditions
Over time, controlled material erosion occurs, making silicon electrodes a critical consumable part in semiconductor manufacturing systems.
Key Advantages of Single Crystal Silicon Electrodes
High Purity Semiconductor-Grade Material
Produced from 5N high-purity single crystal silicon, ensuring:
- Minimal metallic contamination
- Stable electrical characteristics
- Compatibility with advanced wafer processes
Excellent Plasma Compatibility
Silicon electrodes exhibit stable behavior in plasma environments, helping:
- Reduce particle contamination
- Maintain wafer yield stability
- Improve process repeatability
Multiple Resistivity Options
Different resistivity grades allow process optimization for:
- Plasma density control
- RF power coupling efficiency
- Electrical field uniformity
Precision Gas Distribution Design
Customizable hole patterns enable:
- Uniform gas flow distribution
- Improved plasma consistency across wafer surface
- Enhanced etching and deposition accuracy
Semiconductor-Grade Machining Accuracy
High-precision fabrication ensures:
- Tight dimensional control (<10 μm)
- Stable integration with chamber hardware
- Consistent wafer-to-wafer performance
Technical Specifications
| Parameter | Specification |
|---|---|
| Material | Single Crystal Silicon |
| Purity | ≥ 99.999% (5N) |
| Max Diameter | Up to 480 mm |
| Thickness | Custom (5–50 mm) |
| Resistivity (Low) | < 0.02 Ω·cm |
| Resistivity (Medium) | 1 – 4 Ω·cm |
| Resistivity (High) | 70 – 90 Ω·cm |
| Resistivity Uniformity | < 5% (RRG) |
| Gas Hole Diameter | 0.2 – 0.8 mm (customizable) |
| Surface Finish | Polished / Lapped / Ground |
| Surface Roughness | Ra ≤ 0.8 μm (polished lower) |
| Machining Accuracy | < 10 μm |
| Flatness | ≤ 30 μm (size dependent) |
| Edge Design | Custom chamfer / radius |
| Quality Standard | No cracks, chips, or contamination |
Semiconductor Applications
Silicon electrodes are widely used in:
- ICP and RIE plasma etching systems
- CVD and PECVD deposition equipment
- Wafer surface treatment processes
- Plasma distribution systems
- Semiconductor chamber internal assemblies
- Gas flow and RF coupling structures
They are suitable for both mature semiconductor nodes and standard high-volume manufacturing environments.
Silicon vs SiC Electrodes (Selection Insight)
| Feature | Silicon Electrode | SiC Electrode |
|---|---|---|
| Cost | Lower | Higher |
| Machinability | Excellent | More difficult |
| Plasma Resistance | Moderate | High |
| Lifetime | Medium | Long |
| Process Compatibility | Excellent (Si-based fabs) | Excellent (harsh environments) |
| Best Use Case | Standard processes | High-end / aggressive plasma |
Silicon electrodes are often preferred when cost efficiency and silicon-process compatibility are primary considerations.
Why Choose Silicon Electrodes?
Silicon electrodes remain widely used because they offer:
- Strong compatibility with silicon wafer manufacturing
- Balanced performance and cost efficiency
- Easier customization and fabrication flexibility
- Reliable plasma behavior in standard process conditions
For applications requiring extreme plasma resistance or extended lifetime, SiC-based solutions may be considered instead.
Customization Options
Available customization includes:
- Diameter and thickness optimization
- Resistivity tuning (low / medium / high)
- Gas hole pattern design
- Surface finishing (polished, lapped, ground)
- Edge shaping and chamfer design
- OEM drawing-based manufacturing
FAQ
Q1: Is the silicon electrode a consumable part?
Yes. It is a critical consumable in plasma systems and gradually wears under ion bombardment and chemical exposure.
Q2: How do I choose resistivity?
Low resistivity is used for higher conductivity applications, while high resistivity is used for better electrical control and insulation in plasma environments.
Q3: Can this electrode be customized?
Yes. All dimensions, resistivity levels, gas distribution patterns, and surface finishes can be customized according to equipment requirements.
Q4: What is the main advantage of silicon over SiC?
Silicon electrodes are more cost-effective, easier to machine, and highly compatible with silicon-based semiconductor processes.
Related Product
CVD SiC Ring for Semiconductor Plasma Etching & Chamber Protection
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