SK hynix Commits 54tn Won to Two New Memory Fabs

SK hynix Committed $39bn to Two Fabs. The First Cleanroom Opens in 2028.

35.2 trillion won for a Yongin DRAM fab, 19.1 trillion for a Cheongju NAND fab. Neither touches the memory shortage that prompted them.

SK hynix said on 7 August that it will spend 54.3 trillion won — roughly $39bn — on two new fabs. 35.2tn won goes to Yongin Y2 for DRAM and 19.1tn won to Cheongju M17 for NAND. It is the largest single memory capex commitment of this cycle.

The dates are the story

Yongin Y2 covers about 1,130,000 m²; construction starts July 2027 and the first cleanroom opens June 2029, with investment running through October 2031. Cheongju M17 covers about 680,000 m²; construction starts February 2027, first cleanroom December 2028. None of this relieves the shortage now.

Cleanroom is not output

A cleanroom opening is a building milestone. Equipment move-in, qualification and ramp follow it, typically adding quarters rather than weeks. The first wafers from either site arrive well after the dates in the announcement, and the announcement does not give them.

What it signals instead

SK hynix's own framing is "a decision made to seize opportunities in line with the market's growth speed" and an aim to "establish ourselves as a key partner in AI infrastructure". Committing to 2029 and 2031 capacity is a statement that the company expects AI memory demand to still be structurally short at the end of the decade, not merely through the current squeeze.

The dollar figure is derived

SK hynix disclosed won. The ~$39bn circulating in coverage is a currency conversion, not a separately stated number. Yongin Y1's initial cleanroom is due to begin operations in February 2027, and all four Yongin fabs are now targeted for completion by 2033.

Why It Matters

Memory, not logic, is the binding constraint on AI systems right now, and the industry's structural answer arrives in 2029. Anything that has to ship before then competes for wafers that already exist.