SK Hynix Accelerates P&T7 Cleanroom Construction, Total Budget Maintained at KRW 19 Trillion
Alina Collins
SK Hynix's board approved KRW 7.09 trillion in facility spending to fast-track cleanroom construction at its Cheongju P&T7 advanced packaging plant; the project's KRW 19 trillion total budget is unchanged, but the timeline for HBM packaging capacity just got tighter.
How much was approved — and is this new money?
The KRW 7.09 trillion the board greenlit on July 22 is not additional budget. SK Hynix pulled existing spending forward. This means → the total cost stays the same, but the cash goes out the door faster.
The investment window runs from November 2025 through December 2032, representing 5.88% of SK Hynix's shareholder equity.
In plain terms = the company isn't raising its bet — it's decided the market clock is ticking faster and the capacity needs to arrive sooner.
What exactly is P&T7?
P&T7 will be SK Hynix's seventh packaging and test facility, dedicated to advanced packaging for AI memory — chiefly HBM (High Bandwidth Memory), the ultra-fast memory that feeds data to AI chips.
Planned cleanroom space totals roughly 150,000 m²: about 90,000 m² for wafer testing and 60,000 m² for wafer-level packaging (WLP — completing packaging steps before the wafer is diced into individual chips).
This reflects a shift in HBM's capacity bottleneck: the constraint is moving from "making chips" to "packaging chips." Packaging speed now dictates how much AI memory ships.
When will it actually start producing?
The wafer-test line targets completion by October 2027; the WLP line ramps in stages through February 2028.
The overall facility is set for completion by end of 2027, with packaging lines going live in early 2028.
This means → if the schedule holds, SK Hynix's HBM packaging capacity takes a step-function jump in the first half of 2028.
Why is Cheongju the critical battleground?
SK Hynix plans to invest roughly KRW 100 trillion in the Cheongju region: about KRW 80 trillion for the planned M17 NAND fab and roughly KRW 20 trillion for P&T7 and related facilities.
Cheongju already houses the M11, M12, M15, and M15X production sites. M17 construction is slated to begin in 2027, targeting production in H1 2029.
In plain terms = Cheongju is becoming SK Hynix's "AI memory super-campus" — NAND flash, HBM packaging, and nearly every AI-linked capacity line are converging here.
What does this signal for the market?
The stated reasons for accelerating are rising production demand and a compressed cleanroom-readiness timeline — SK Hynix is clearly responding to urgent signals from its customers.
This reflects the supply-demand picture in AI memory: demand is outrunning capacity ramp-ups, and whoever builds packaging capacity first captures the delivery window.
Whether SK Hynix hits its 2027–2028 deadlines will be the defining checkpoint for its AI memory supply credibility.
Content is for reference only, not financial advice.