"Ultimate Semiconductor", Diamond Wafer Reveals New possibilities

At present, the market application of diamonds can be roughly divided into three directions. Firstly, they can be used as decorative diamonds, and related uses are more familiar to people; Secondly, it can be made into diamond wafer, which is a high-quality heat dissipation material; The third is to form semiconductor materials after doping. This application field is still in the experimental stage, but its development prospects are widely optimistic in the industry.

The industry generally refers to semiconductor materials with a bandgap width greater than 2.3 electron volts (eV) as wide bandgap semiconductor materials. SiC is currently the most mature wide bandgap semiconductor material, followed closely by GaN. At the same time, the industry is actively developing new wide bandgap semiconductor materials.

The bandgap width of diamond material reaches 5.45 eV, and its thermal conductivity is the highest among known semiconductor materials. Therefore, it is a highly advantageous semiconductor material that can meet the needs of future high-power, strong electric field, and radiation resistance. It is an ideal material for making power semiconductor devices. It has broad application prospects in fields such as smart grids and rail transit.

Compared to Si, SiC, and GaN materials, diamond has the greatest advantage in terms of carrier mobility (hole: 3800cm2 · V-1 · s-1, electron: 4500 cm2 · V-1 · s-1), breakdown electric field (>10 MV · cm-1), and thermal conductivity (22 W · K-1 · cm-1), in addition to the bandgap width. Its inherent material advantage is that it has the highest thermal conductivity in nature and the highest bulk material mobility. Its excellent electrical properties bear the great expectation of humans to call diamond the ultimate semiconductor.

In addition, diamond is the hardest substance naturally present in nature, which has been discovered by humans for a long time. Its main component is carbon. Carbon, as an element, has always been a focus of research. Based on changes in crystal structure and bonding methods, carbon elements form or can be tuned into substances or materials with different property parameters. Now facing a new round of technological revolution and industrial transformation, the demand for semiconductor materials and materials by humans is further expanding and expanding. Diamond has the characteristics of the highest thermal conductivity and tunable characterization of conductive semiconductor properties, therefore, it is receiving increasing attention from the scientific and industrial communities.

In recent years, diamond power electronics has made new technological breakthroughs in materials and devices. CSMH uses the MPCVD method to grow high-quality diamonds, achieving the surface roughness of diamond wafer growth Ra<1nm. CSMH is committed to promoting the application of diamond in high-power lasers, 5G communication, new energy vehicles, new energy photovoltaics, aerospace and other fields. Its core products include diamond wafers, diamond heat sinks, diamond optical windows, and diamond heterojunction integrated composite substrates.