Diamond chip technology: accelerating the future semiconductor revolution

At present, the semiconductor industry has entered a critical period of transformation, and silicon-based semiconductors have encountered bottlenecks such as high power, high frequency, high temperature and radiation. The third-generation semiconductors, represented by GaN and SiC, lead power devices to move towards high power, miniaturization, integration and multi-functionality, but heat dissipation and energy efficiency are still the focus of the industry. Against this background, the chip revolution driven by diamond materials has quietly emerged, and its essence is unprocessed diamonds. The emerging "diamond" chip has attracted much attention for its unique charm and has great potential in the future, but it is also accompanied by technological progress and multiple challenges.

Diamond, known as "the hardest in nature", combines high hardness, excellent thermal conductivity, high electron mobility, high voltage resistance, strong radio frequency, low cost, and high temperature resistance. Its semiconductor properties include ultra-wide bandgap, high breakdown field strength, high-speed carrier drift, high thermal conductivity and excellent device quality factor. It is suitable for high-temperature, high-frequency, high-power radiation-resistant electronic devices to solve the problems of "self-heating" and "avalanche breakdown". Diamond also exhibits excellent optical transmittance, stable electrical insulation, and high mechanical strength and wear resistance. It is widely used in optoelectronic devices, complex circuits and extreme working condition chips. It plays a key role in 5G/6G communications, microwave integrated circuits, sensors and other fields, and is regarded as the "ultimate semiconductor material". The use of diamond electronic devices can reduce the burden of thermal management, improve energy efficiency, and enhance pressure resistance and adaptability to harsh environments.

Diamond improves power conversion efficiency, extends battery life, and shortens charging time in electric vehicles; in 5G and future network deployments, it meets high-frequency and high-power requirements, and helps communication equipment such as RF switches and amplifiers; in the consumer electronics field, it promotes the miniaturization, high-speed, and high-efficiency of equipment. According to Virtuemarket's forecast, the diamond semiconductor substrate market will grow from US$151 million in 2023 to US$342 million in 2030, with a CAGR of 12.3%. Its characteristic advantages promote the application of diamond in multiple links of semiconductors, covering thermal management, packaging, micro-nano processing, BDD electrodes and quantum technology, leading technological innovation and industrial upgrading.

The global research and development and industrialization of diamond semiconductors are accelerating, with companies such as Element Six, Huawei, and Diamond Foundry leading the technological breakthroughs and mass production plans. With the active participation of many countries, the industrial chain is gradually improving, covering all aspects from raw materials to packaging and testing. The industry's high attention and resource convergence are accelerating the process, heralding the arrival of the "diamond" wafer era. Diamond semiconductors, with their excellent properties such as high thermal conductivity and wide bandgap, are moving towards a multifunctional development transition period. In the future, large-scale, high-quality diamond deposition technology will help integrated circuits enter a new era.

Although the research boom of diamond semiconductors started decades ago, it has not been widely used until now. Faced with challenges such as high cost, difficult processing and immature technology, diamond semiconductors still have potential in the semiconductor chain. In the future, with the efforts of all parties, diamond materials will develop further and play a key role in specific fields as a complement to traditional materials.