SK Hynix Accelerates P&T7 Cleanroom Construction, Total Budget Maintained at KRW 19 Trillion
nashnova research
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.
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