China's Premiere Memory-Maker YMTC Plans Two Additional Wuhan Fabs Using Homegrown Chipmaking Tools — Phase 3 Crosses 50% Domestic Tooling Threshold

Why It Matters

The move tests China’s ability to produce high‑volume 3D NAND with indigenous equipment, reducing reliance on Western suppliers and reshaping the global memory supply chain.

Key Takeaways

• Phase 3 fab uses over 50% domestic equipment.
• Two new Wuhan fabs will add 200,000 wafers per month.
• YMTC allocates half of Phase 3 capacity to DRAM production.
• Domestic tool adoption rises to 45%, highest among Chinese fabs.
• US export restrictions push YMTC toward homegrown chipmaking tools.

Pulse Analysis

YMTC’s aggressive expansion in Wuhan underscores China’s drive for semiconductor self‑sufficiency. By coupling two new 100,000‑wafers‑per‑month fabs with a Phase 3 plant that relies on more than half domestic tooling, the company is turning policy support into tangible capacity. The shift to Chinese‑made lithography, etch and stacking equipment tests whether homegrown tools can sustain the tight yield windows required for 3D NAND, a critical benchmark for the nation’s broader chip‑making ambitions.

The strategic allocation of 50% of Phase 3’s output to DRAM reflects YMTC’s bid to diversify beyond NAND and capture a slice of the fast‑growing high‑bandwidth memory market. While its Xtacking 4.0 architecture trails SK hynix’s 4D and Samsung’s V‑NAND in layer count, the company’s 11.8% global NAND share positions it as a credible challenger. If the domestic tooling proves viable, YMTC could accelerate its roadmap, potentially reaching a 15% market share by 2028, narrowing the gap with industry leaders.

For the broader industry, YMTC’s progress signals a turning point in the US‑China technology rivalry. Export controls that placed the firm on the Entity List have forced a rapid pivot to indigenous equipment, prompting Beijing to pour tens of billions of yuan into domestic tool development. Success would not only bolster China’s memory supply but also weaken the leverage of Western equipment makers, reshaping global supply dynamics and prompting other manufacturers to reassess their reliance on foreign toolsets.