SK Hynix Begins Equipment Orders for Yongin Fab, Initial Monthly Capacity of 20K Wafers
Miles Bennett
SK hynix has placed its first equipment orders for the Yongin Y1 fab's initial cleanroom, targeting 20,000 wafers per month; the production timeline has been pulled forward by roughly three months, pointing straight at the HBM4E volume-supply window.
How far along is the Yongin fab?
Equipment orders are now placed for Y1's first cleanroom (ph1) and its advanced DRAM line. This means → the project has moved from civil construction into equipment installation — mass-production prep is officially under way.
Updated timeline: pilot-line setup starts February 2027; main equipment goes in March–April. The original May start date has been pulled forward by about three months.
Pricing negotiations with equipment vendors also moved up — from year-end to early Q3. In plain terms = SK hynix is not just building faster; it is locking in equipment bills earlier too.
What will this line produce?
The line will run sixth-generation 10 nm-class (1c) DRAM — the latest commercial DRAM node — targeting high-value DDR, low-power DDR, and HBM4E.
SK hynix has already shipped 12-layer HBM4E samples to customers: 32 Gb chips, 12-high stack, 48 GB per package, bandwidth of roughly 4 TB/s, and energy efficiency over 20% better than HBM4.
This means → once Yongin capacity comes online, it will directly close the gap between HBM4E samples and full-scale shipments.
Why the rush to accelerate?
SK hynix CEO Kwak Noh-jung expects 2027 to be the tightest supply year in the industry's history, with demand outstripping supply well past 2030.
Meritz Securities analyst Kim Sunwoo estimates DRAM makers can currently meet only about 75%–80% of demand; by 2027 that ratio may drop to the 60% range — and even stripping out speculative orders, it sits at roughly 70%.
In plain terms = supply is already short, and next year it gets shorter. Building ahead of schedule is not a luxury — it is demand-driven urgency.
How much is being spent?
In February, SK hynix announced an additional KRW 2.16 trillion (approximately USD 14.48 billion) for the Y1 building shell and cleanrooms two through six. Combined with the KRW 9.4 trillion disclosed in July 2024, total investment in Y1's first fab building reaches roughly KRW 31 trillion — production equipment costs are on top.
The entire Yongin cluster spans four fabs with a projected total investment of KRW 600 trillion. The fourth fab's completion target has been moved from 2045 to 2033.
This reflects a decision to compress what was originally a 20-year mega-project into under a decade.
What should the supply chain watch next?
Y1's second and third cleanrooms are expected to break ground in H2 2026; other equipment vendors are already preparing for potential orders. This means → upstream equipment suppliers will see large SK hynix orders earlier than originally planned.
The key test: whether the supply–demand gap narrows meaningfully before 2027 — that will determine if the accelerated buildout is working.
Put simply = the early equipment orders signal that SK hynix is betting on sustained strong demand. If demand falls short, the capacity locked in ahead of schedule becomes a burden.
Content is for reference only, not financial advice.