Samsung breaks ground on Onyang HBM packaging hub as Cheonan runs out of room
In brief
- Samsung broke ground on an HBM packaging facility at Onyang, Asan, on November 12, 2026, Crypto Briefing reported.
- 46 trillion won (around $34 billion) is earmarked for five packaging lines, Crypto Briefing reported.
- June 2028 is the slated operations start, a year ahead of the prior timeline, per the report.
- Campus floor space is set to grow from 270,000 to 420,000 square meters, according to the report.
Why Onyang, and why now?
Cheonan is out of room. That's the short version.
Samsung's nearby Cheonan campus, where much of this packaging work happens today, has been running out of space, Crypto Briefing reported, so the company is turning Onyang into a second major production base for advanced AI memory. The outlet said the strain had already led Samsung to shift equipment around and to outsource some of its conventional memory module work (that detail comes from the report, not from a Samsung statement).
Onyang itself isn't new. The site has been running since 1991, mostly handling conventional semiconductor assembly and testing.
The numbers behind the build-out
According to the report, construction of Line 5 is expected to push cleanroom space at the site to approximately 31,000 square meters, while total campus floor space is set to grow from 270,000 square meters to 420,000 square meters. Crypto Briefing described the June 2028 start as a year ahead of what was previously expected. The spending is aimed squarely at expanding Samsung's back-end capacity, the outlet said.
The 46 trillion won figure sits inside a bigger commitment. Samsung has announced a total of 60 trillion won for its broader Chungcheong semiconductor initiative, which includes upgrades at the Cheonan campus. Crypto Briefing said the investment lines up with a South Korean government initiative called the Three Great Leap Mega Projects.
The HBM supply backdrop
It's the AI server market that gives this story its weight. Crypto Briefing's report said HBM for AI servers has been persistently tight, and it pointed to unnamed reports projecting shortages through 2028, with customer demand outpacing current contract supply into that year. Those projections weren't tied to a named source, and they don't come from Samsung.
Five lines, 46 trillion won and a June 2028 target: that's what Samsung put in the ground on November 12.
The next marker is whether Onyang's lines open on the timeline the report described, and how much of Cheonan's load they take on once they do.
