Diamond has excellent electrical properties: ultra-wide band gap, ultra-high breakdown field strength, high electron and hole mobility, and is expected to become the "ultimate semiconductor"; acoustically, diamond has the highest surface acoustic wave among all materials Speed and extremely high Young's modulus; optically, diamond can transmit photons that are smaller than the band gap energy from far infrared to ultraviolet; thermally, its thermal conductivity exceeds that of copper, so diamond has the potential for cross-field applications. Table 1 shows the properties of diamond materials and their corresponding application fields.
Compared with the traditional diamond high temperature and high pressure (HPHT) synthesis method, the functional diamond mainly adopts (atmospheric pressure) chemical vapor deposition (CVD) method. CVD diamond is divided into CVD film (conventional diamond film, nano-diamond film, thickness less than 50 μm) and self-supporting thick film (single crystal diamond and polycrystalline diamond). According to the synthesis technology, it is divided into microwave-assisted type (MPCVD), hot wire type and DC type. MPCVD technology is currently the mainstream method for synthesizing high-quality diamond.
Bohong sharing--Diamond has excellent electrical properties
2023 03/31