US Tightens Export Controls on China's Memory Chip Sector
The U.S. government has initiated a new round of export controls targeting China's NAND and DRAM sectors, specifically aiming to disrupt fabs operated by YMTC. The move is part of a broader strategy to use advanced semiconductors as a geopolitical "choke point" to slow China's AI development. In response, China is accelerating its mobilization of state capital and supply chain workarounds, with reports suggesting Huawei is advancing its self-reliance through rumored in-house fabs and partnerships with firms like SMIC and SiCarrier.
- The U.S. Commerce Department's Bureau of Industry and Security (BIS) has progressively tightened controls, with significant updates in October 2022, October 2023, and December 2024. The latest rules expanded restrictions on semiconductor manufacturing equipment and high-bandwidth memory (HBM), and added over 140 entities to the Entity List, including some in Japan, South Korea, and Singapore. - The controls specifically target China's ability to produce advanced logic chips (16/14nm or below), DRAM (18nm half-pitch or less), and NAND flash memory with 128 layers or more. These restrictions also limit the ability of U.S. persons to work for Chinese semiconductor facilities, aiming to create a human capital bottleneck. - In response, China has established its largest-ever semiconductor investment fund, a $47.5 billion state-backed initiative to bolster self-sufficiency. This is the third and largest phase of the China Integrated Circuit Industry Investment Fund, which previously launched funds of $19.2 billion in 2014 and $28.2 billion in 2019. - Huawei has emerged as a central player in China's efforts, working to integrate the domestic supply chain and reduce reliance on foreign technology. The company is developing its own chip design software (EDA) and has invested in a network of companies, sometimes covertly, to build capabilities across the entire semiconductor value chain, from materials to manufacturing equipment. - Despite the controls, Chinese firms have demonstrated notable progress. YMTC produced what was described as the world's most advanced 3D NAND memory chip, and SMIC manufactured a 7nm chip for Huawei's Mate 60 Pro smartphone, feats previously thought to be impossible under the sanctions. - China has also implemented retaliatory measures, leveraging its dominance in critical raw materials by restricting exports of gallium and germanium, which are essential for semiconductor production. Additionally, China has blocked U.S. memory chip maker Micron Technology from certain domestic sales. - The U.S. has expanded its Foreign Direct Product Rule (FDPR) to further restrict China's access to foreign-made items produced using U.S. technology or software. New rules specifically target companies on the Entity List with a "Footnote 5" designation, broadening the scope of controlled items. - The economic impact on U.S. and allied companies is mixed; while some firms like Nvidia have lost market access for their most advanced AI chips, suppliers of wafer-fabrication equipment have seen business remain strong in the initial years of the controls. However, there is concern that the loss of revenue from China could hamper the high levels of R&D investment characteristic of the industry.
