Polycrystalline CVD Diamond Heat Spreader Plates
Free-standing polycrystalline CVD diamond heat spreader plates grown by microwave plasma CVD for thermal management and electronic packaging applications.
The material is available in thermal conductivity grades of 1000 W/m·K, 1500+ W/m·K and 1800+ W/m·K. Parent plates are produced in 2-inch and 4-inch formats and can be cut into custom dimensions for heat spreaders, submounts, thermal substrates and prototype components.
Thicknesses from 0.05 mm to 2.0 mm are available, with lapped or polished surface finishes depending on application requirements.
Specifications
| Item | Description |
|---|---|
| Material | Polycrystalline CVD Diamond |
| Growth Method | Microwave Plasma CVD |
| Structure | Free-Standing Diamond Plate |
| Parent Plate Size | 2-inch, 4-inch |
| Thickness Range | 0.05–2.0 mm |
| Thermal Conductivity | 1000, 1500+, 1800+ W/m·K |
| Surface Finish | Lapped or Polished |
| Surface Roughness | Up to Ra ≤ 30 nm |
| Shape | Square, Rectangular, Round or Custom |
| Supply Mode | Custom Manufacturing |
Thermal Conductivity Grades
| Grade | Thermal Conductivity | Typical Applications |
|---|---|---|
| Standard Thermal | 1000 W/m·K | General Heat Spreading, Thermal Evaluation |
| High Thermal | 1500+ W/m·K | Electronic Packaging, RF Devices, Laser Modules |
| Premium Thermal | 1800+ W/m·K | High-Power Electronics, Advanced Packaging, High Heat Flux Applications |
Material appearance may vary from opaque to semi-transparent depending on grade and growth characteristics. For optical transmission applications, please refer to optical-grade CVD diamond products.
Why Polycrystalline CVD Diamond?
Polycrystalline CVD diamond offers significantly higher thermal conductivity than conventional thermal management materials used in electronic packaging.
| Material | Typical Thermal Conductivity (W/m·K) |
|---|---|
| Copper | ~400 |
| Aluminum Nitride (AlN) | 170–220 |
| Silicon Carbide (SiC) | 120–490 |
| Polycrystalline CVD Diamond | 1000–1800+ |
This combination of high thermal conductivity, electrical insulation and dimensional stability makes CVD diamond suitable for applications where localized heat must be spread efficiently.
Typical Applications
Polycrystalline CVD diamond heat spreaders are widely used in laser diode submounts, RF power devices, microwave electronics, power semiconductor modules, high-power LED systems and advanced semiconductor packaging.
The material is also used for thermal test vehicles, research projects and prototype thermal management assemblies.
Custom Cutting and Processing
Free-standing diamond plates can be supplied as full parent plates or precision-cut components.
Available processing options include:
Custom dimensions
Round, square and irregular shapes
Thickness control
Precision polishing
Edge processing
Inspection reports
For thin plates, tight-tolerance components or packaging applications, flatness, roughness and dimensional requirements should be specified during inquiry.
Ordering Information
For quotation, please provide dimensions, thickness, thermal conductivity grade, quantity and surface finish requirements.
Drawings, tolerance requirements and application information can help determine the most suitable material grade and manufacturing process.