US Government Considers Tighter Restriction on China’s Access to GAA Transistors and HBM Memory

According to sources familiar with the matter and reported by Bloomberg, the Biden administration is considering imposing further export controls to limit China’s ability to acquire advanced semiconductor technologies crucial for developing AI systems. Gate-all-around (GAA) transistor technology and high-bandwidth memory (HBM) chips are at the center of the proposed restrictions. These cutting-edge components play a pivotal role in creating powerful AI accelerators. GAA transistors, a key feature in next-generation chips, promise substantial improvements in power efficiency and processing speeds. Meanwhile, HBM chips enable high-speed data transfer between a processor and memory. While existing sanctions prevent American firms from supplying Chinese companies with equipment for manufacturing leading-edge chips, concerns persist that China could still attain advanced capabilities through other means.

For instance, China’s leading chipmaker, SMIC, could potentially integrate GAA transistors into its existing 7 nm process node, markedly enhancing performance. Access to HBM would further augment China’s ability to develop AI accelerators on par with cutting-edge offerings from US firms. The reflections within the Biden administration show a strategic effort to preserve America’s technological edge by denying China access to key semiconductor innovations. However, implementing such stringent export controls is a delicate balancing act, as it risks heightening tensions and prompting Chinese retaliation. No final decision has been made, and officials continue weighing the proposed restrictions’ pros and cons. Nonetheless, the discussions highlight the pivotal role that semiconductor technology plays in the great power rivalry between the US and China, especially in the AI era.