South Korea’s semiconductor dependence on China grows

China’s export restrictions impact semiconductor supply chain.

a close up of a circuit board

While South Korean memory giants Samsung Electronics and SK hynix experienced a significant sales increase in China during the first half of this year, the report by the Korea Eximbank Overseas Economic Research Institute indicates that South Korea’s reliance on China for critical semiconductor raw materials is also growing. Key materials such as silicon, germanium, gallium, and indium have seen notable increases in demand, with South Korea’s dependence on silicon rising from 68.8% to 75.4% in 2022.

The report emphasises an increasing reliance on rare earth elements, crucial for semiconductor abrasives, and a slight uptick in dependence on tungsten, which is vital for semiconductor wiring. This trend is occurring against the backdrop of export restrictions enacted by the Chinese government on critical minerals such as germanium and gallium, in response to US sanctions. Currently, China dominates the global supply, producing 98% of the world’s gallium and 60% of its germanium, underscoring its pivotal role in the semiconductor supply chain.

Dependence on germanium rose significantly by 17.4 percentage points to 74.3% in 2022, and reliance on gallium and indium also increased by 20.5 percentage points to 46.7%. Despite the Chinese government’s export restrictions, local production among major Chinese firms has remained stable. For example, Samsung’s NAND flash facility in Xi’an has boosted its share of the company’s total NAND capacity from 29% in 2021 to 37% in 2023, with expectations to reach 40% this year.