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2023
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Applications of Synthetic Diamonds in the Semiconductor Field
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The mainstream material of the first-generation semiconductors is silicon (Si). The second-generation semiconductors are primarily gallium arsenide (GaAs) and indium phosphide (InP). Gallium nitride (GaN) and silicon carbide (SiC), which are wide-bandgap semiconductors, are classified as third-generation semiconductors. Compared with first-generation silicon and second-generation compound semiconductors like gallium arsenide, third-generation semiconductors have a wider bandgap; the wider the bandgap, the better the material can withstand high voltages and high currents. Diamond, meanwhile, has emerged as a material for fourth-generation semiconductors.
The mainstream material of the first-generation semiconductors is silicon (Si). The second-generation semiconductors are primarily gallium arsenide (GaAs) and indium phosphide (InP). Gallium nitride (GaN) and silicon carbide (SiC), which are wide-bandgap semiconductors, are classified as third-generation semiconductors. Compared with first-generation silicon and second-generation compound semiconductors such as gallium arsenide, third-generation semiconductors have a wider bandgap; the wider the bandgap, the better the material’s ability to withstand high voltages and high currents. Diamond, meanwhile, has emerged as a material for fourth-generation semiconductors.
As silicon-based electronic devices approach their theoretical limits, the use of wide-bandgap semiconductor materials enables next-generation power electronics to be smaller, faster, more reliable, and more efficient. These materials reduce the mass, volume, and life-cycle costs of power‑electronics components, while also allowing devices to operate at higher temperatures, voltages, and frequencies, thereby delivering superior performance with lower energy consumption.
Diamond is an excellent wide-bandgap semiconductor material, exhibiting outstanding mechanical, thermal, optical, and electrical properties, as well as remarkable chemical inertness. These characteristics enable semiconductor devices fabricated from synthetic diamond to operate under extreme conditions—such as high temperature and high pressure—and even in more specialized environments, thereby meeting the diverse demands of industrial applications. Consequently, in cutting-edge high-tech fields, particularly in electronics, synthetic diamond has attracted widespread attention and is widely recognized as one of the most promising new-generation semiconductor materials.
Owing to its superior properties, synthetic diamond offers broad and irreplaceable advantages and promising prospects in the field of semiconductor materials, particularly under high‑frequency and high‑voltage conditions. With the gradual development of deposition technologies that enable large‑size, high‑quality, versatile, and highly flexible synthetic diamond, it is expected to usher in a new era for the advancement of both conventional and high‑speed integrated circuits. Meanwhile, progress in synthetic diamond fabrication has also accelerated advances in diamond‑based optics and optoelectronics, leading to substantial reductions in the size of optoelectronic devices.
Synthetic diamond
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