At present, the power semiconductor industry presents an oligopolistic pattern. Infineon of Germany, Mitsubishi of Japan, and Fuji of Japan dominate Si technology, and Wolfspeed of the United States dominates SiC technology. China has been strengthening semiconductor input but output is limited, so the market for the entire industry is The supply base is very limited. Due to the high R&D and manufacturing costs required for new technologies, and the possibility of breakthroughs in high-power Si technology, it is expected that a co-existence and competition between Si and SiC solutions may be formed in the future, taking into account technology and cost considerations.