Graphite Rod for Single Crystal Silicon Growth
Product Overview
Jincheng graphite rods for single crystal silicon growth are high-purity, precision-machined graphite components used in Czochralski (CZ) crystal pulling furnaces. These rods serve as support structures, heaters, and crucible supports in the single crystal silicon manufacturing process.
Our single crystal growth graphite rods are manufactured from ultra-high purity, fine-grain isostatic graphite that meets the strictest requirements of the semiconductor and solar photovoltaic industries. Custom diameters and lengths are available to match different crystal puller models.
Key Features
- Ultra-high purity with ash content below 50 ppm for semiconductor-grade silicon
- Excellent thermal stability at temperatures up to 1500°C
- High mechanical strength for structural support in crystal pullers
- Precision machined to tight tolerances for proper furnace fit
- Good thermal shock resistance for repeated heating and cooling cycles
- Low outgassing to prevent contamination of silicon melt
- Custom sizes available for various crystal puller models
- Consistent quality with batch-to-batch property uniformity
Technical Specifications
| Parameter | Value |
|---|---|
| Material | Ultra-high purity isostatic graphite |
| Density | 1.80 - 1.90 g/cm3 |
| Ash Content | < 50 ppm (semiconductor grade) |
| Shore Hardness | 65 - 80 HS |
| Compressive Strength | 100 - 150 MPa |
| Flexural Strength | 50 - 80 MPa |
| Electrical Resistivity | 8 - 13 uOhm·m |
| Max Working Temperature | 1600°C |
| Diameter | 5 mm - 200 mm (custom) |
| Length | Up to 1000 mm (custom) |
Applications
- Czochralski (CZ) silicon crystal pulling for semiconductor-grade silicon ingots
- Single crystal silicon growth for solar photovoltaic wafers
- Float zone (FZ) crystal growth for high-purity silicon
- Compound semiconductor growth for GaAs, InP, and other semiconductor materials
- Crystal puller hot zone components including heaters and supports
- Semiconductor equipment manufacturing for crystal growth furnace builders
Why Choose Jincheng Graphite Rods?
- Semiconductor-grade ultra-high purity graphite for the most demanding crystal growth applications
- Precision CNC machining with tight tolerances for perfect furnace fit
- Experience with major crystal puller brands including PVA, Kayex, and Mitsubishi
- Custom rod design based on your furnace specifications and hot zone design
- Competitive pricing as a direct graphite component manufacturer
- Fast delivery - standard rods within 1 week, custom within 2 weeks
- Technical support for graphite grade selection and hot zone optimization
- Global shipping to semiconductor fabs and solar cell manufacturers worldwide
Frequently Asked Questions
Q1: What purity level do you recommend for semiconductor-grade silicon growth?
A: For semiconductor-grade silicon, we recommend ultra-high purity graphite with ash content below 50 ppm. For solar-grade silicon, graphite with ash content below 200 ppm is typically sufficient.
Q2: How long do graphite rods last in crystal pullers?
A: Rod life depends on furnace conditions and hot zone design. Under typical CZ silicon growth conditions, graphite hot zone components last 3-6 months before replacement.
Q3: Can you manufacture rods with specific dimensions and tolerances?
A: Yes, we manufacture custom graphite rods based on your drawings and specifications. Please provide your dimensional requirements for quotation.
Q4: Do you offer coating services for graphite rods?
A: Yes, we can provide various coatings such as tantalum carbide (TaC) coating for extended rod life and reduced silicon contamination.
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