Diamond Wafer

We can provide MPCVD single crystal and polycrystalline diamond materials:

Supply:

Polycrystalline diamond: 2-6 inches

Single crystal diamond: 2 inches

Electronic grade diamond:

Application:

Quantum color center

Diamond heat sink

Diamond optical window

Diamond wafer substrate

MPCVD (microwave plasma chemical vapor deposition) diamond wafer is a synthetic diamond manufactured by chemical vapor deposition (CVD) technology, which has a wide range of applications and unique physical properties. The following is a detailed introduction to the manufacturing process, classification and application market of MPCVD diamond wafers.

Manufacturing process:

1. Preparation:

Substrate selection: Usually single crystal silicon, single crystal diamond or other suitable substrate materials are selected.

Substrate cleaning: Use chemical reagents (such as acidic solution) to clean the substrate to ensure that there are no contaminants on its surface.

2. Reaction chamber preparation:

Reactor: Use MPCVD reactor, which contains microwave source, reaction chamber and gas supply system.

Gas preparation: Commonly used gases include methane (CH4) and hydrogen (H2), with a ratio of 1:99 to 5:95.

3. Deposition process:

Reaction conditions: In the reaction chamber, plasma is generated by microwave excitation, and the temperature is usually controlled between 800°C and 1200°C.

Gas flow rate: The flow rate and ratio of the gas are precisely controlled to decompose the carbon atoms in the methane and deposit on the substrate to form a diamond film.

4. Post-processing:

Annealing: After deposition, annealing is usually required to improve the crystal quality and stability of the diamond film.

Surface treatment: Depending on the specific application, the diamond surface is polished or otherwise treated to achieve the required surface flatness and finish.

Classification:

MPCVD diamond wafers can be divided into the following categories according to their purity, grain size and use:

1. Single crystal diamond (SCD):

Characteristics: It has excellent electronic properties and optical properties.

Uses: Widely used in high-power electronic devices, optical components and quantum computing.

2. Polycrystalline diamond (PCD):

Features: Composed of multiple grains, with high hardness and wear resistance.

Uses: Commonly used in cutting tools, abrasives and protective coatings.

3. Ultra-nanocrystalline diamond (UNCD):

Features: Extremely small grain size, smooth surface, high hardness.

Uses: Used in ultra-precision machining and biomedical equipment.

4. Doped diamond:

Features: Improve conductivity or other properties through doping (such as boron doping).

Uses: Applied in semiconductor devices, sensors and electrochemical electrodes.

Application market:

1. Electronics and semiconductor industry:

High-power electronic devices: Used to manufacture high-power, high-frequency electronic devices, such as power semiconductor devices and high-frequency field effect transistors (FETs).

Thermal management materials: Due to the high thermal conductivity of diamond, it is used for heat dissipation management of high-power electronic devices.

2. Optical and optoelectronic industries:

Laser windows and lenses: used for windows and lenses of high-power lasers due to their high transparency and wear resistance.

Photodetectors: used for UV and X-ray detectors.

3. Machining and tools:

Cutting and grinding tools: used to make high-hardness cutting tools and abrasives, widely used in metal processing, stone cutting and other fields.

Drill bits and saw blades: used in oil drilling and mining industries.

4. Medical and biotechnology:

Biosensors: used for biosensing and biodetection equipment.

Medical device coatings: used to enhance the wear resistance and biocompatibility of medical devices.

5. Quantum computing and quantum communication:

Qubits: widely used in quantum computing and quantum communication research due to the excellent quantum properties of nitrogen-vacancy centers (NV centers) in diamond.

In short, MPCVD diamond wafers have shown great application potential in multiple high-tech fields due to their excellent physical and chemical properties, and the market demand is growing.