50mm*0.3 Polycrystalline Optical Grade CVD Diamond Window Diamond Wafer

Product Description

  big size 50mm*0.3 polycrystalline Optical Grade CVD Diamond Window Diamond Wafer

Product Description

Leveraging state of the art CVD diamond growth and precision polishing technologies, we offer high performance, large area polycrystalline optical grade diamond products. As a reliable supplier for optical and thermal management applications, we are committed to providing large size, high quality optical components and heat spreader substrates.

 

Manufacturing Process

Our polycrystalline optical grade diamond is produced by Microwave Plasma Chemical Vapor Deposition (MPCVD). High purity methane and hydrogen gases are activated by microwave plasma, allowing diamond nucleation and uniform growth on a substrate. The asgrown diamond film is then laser cut, precisely ground, and polished to achieve optical grade surface quality and tight dimensional tolerances. This process ensures low defect density, high purity, and excellent batchtobatch consistency.

 

Key Features & Selling Points

Ultra Wide Optical Transmission Band
Excellent transmittance from deep ultraviolet (UV) to far infrared (FIR) and even microwave bands. Spectral coverage: 220 nm to >50 µm.

Superior Thermal Management
Thermal conductivity > 2200 W/m·K at room temperature. Under high heat flux conditions (up to 350 W/cm² or higher) for high power lasers and semiconductor laser bars, it rapidly dissipates heat, ensuring device reliability and performance.

Extreme Hardness & Durability
Mohs hardness 10, outstanding scratch resistance and chemical inertness. Suitable for harsh industrial and medical environments.

Large Size Customization Capability
Diameter up to 5 200 mm (customizable), thickness 0.5 3.0 mm (customizable). Meets the requirements of large size core optical components such as EUV lithography and high power microwave windows.

Low Absorption & Low Scatter
Extremely low bulk absorption and scattering loss at 1064 nm and 10.6 µm, preserving the beam quality of high power lasers.

High Surface Quality Tolerance
Surface quality: 40 20 scratchdig. Parallelism <5 arcmin. Surface roughness <15 nm over 1 mm². Ensures high precision and stability of optical systems.

 

Specifications

 

 

Parameter	Value
Material Form	Window, wafer, plate, custom geometry (OEM drawing)
Typical Dimensions	Ø5 mm - Ø200 mm, or square/custom shapes
Thickness	0.3 mm - 3.0 mm (precise control & customization)
Optical Transmission Range	220 nm - >50 µm
Thermal Conductivity	1200 - 2200+ W/m·K @ 300 K
CTE (Coefficient of Thermal Expansion)	1.0 ppm/K @ 300 K
Refractive Index	2.38 @ 10.6 µm
Bulk Absorption Coefficient	<0.07 cm-¹ @ 10.6 µm; <1 cm-¹ @ 1 µm
Young's Modulus	1050 GPa
Hardness	Mohs 10 / 81 ± 18 GPa
Purity / Quality Grade	Optical Grade
Deposition Process	MPCVD (Microwave Plasma CVD)

 

Applications

High Power Lasers - Output windows for high power CO2 lasers; output couplers for high power solid state and fiber lasers. Withstands extreme power densities, effectively cools the window and prevents thermal lensing.

EUV Lithography Systems - Critical optical components for advanced semiconductor node manufacturing.

Microwave Engineering & Terahertz Technology - Microwave windows, THz beam splitters, THz lenses, and THz vacuum windows.

High End Heat Spreaders - Substrates or heat sinks for high power semiconductor laser bars, GaN RF power amplifiers, high performance CPU/GPU chips. Rapidly spreads heat laterally from hot spots.

Optical Detection - Nuclear detectors, X ray windows, and other optical/protective windows in extreme environments.

Aerospace & Defense - Missile domes, aircraft optical windows, etc.

 

Quality Assurance & Customization Capabilities

All products undergo strict in process quality control and factory inspection. Test reports (spectral data, thermal conductivity, etc.) are available upon request. We accept OEM/ODM custom orders based on drawings, offering various sizes, thicknesses, and coating options (including anti reflection and high reflection coatings). For any special requirements, please contact our sales engineers.

1.       Large size 14*14

2.       Scope of application: industrialgrade   Electronic grade   optical grade

3.Hardness and high mechanical stability

4. Scratch proof and wear resistance.

5.Wide spectral transparency UV to THz

6.High Strength and Great Thermal Stability

7.White Color (from brown to colorless)

8.Other quality index could reach the international standard

9;100,110orientation.

If you have any needs of diamond or diamond correlates please do feel free to contact me for more details of the product you are interested in.