Samsung Onyang HBM Packaging Plant Breaks Ground in September with 6 Trillion KRW Investment
Nashnova编辑部
Samsung Electronics will begin building an advanced HBM packaging plant in Onyang, South Korea, in September 2026, investing KRW 6 trillion upfront — one month ahead of schedule and the first of South Korea's three government-designated "super projects" to reach construction.
What will this plant actually do?
Onyang is positioned as Samsung's advanced packaging and assembly hub for data-centre HBM — not wafer-level packaging, which stays at the neighbouring Cheonan campus.
In plain terms = Cheonan handles the core back-end processing; Onyang handles quality verification, final packaging and shipment. Together they form one complete HBM back-end line.
The plant will have 31,000 sqm of cleanroom space on a roughly 390,000 sqm site, expanding the campus from 270,000 sqm to 420,000 sqm of total floor area.
Target mass-production date: May 2029. Expected new direct jobs: roughly 700.
Why is it starting a month early?
The Chungcheongnam-do urban planning committee approved the expansion plan on August 19 — more than a month ahead of the original schedule.
This means → groundbreaking moves from the previously announced October to September; the permitting process did not become a bottleneck.
This signals that local government approvals for semiconductor projects in South Korea are visibly accelerating — the Onyang plant is the first of the government's three "super projects" to enter construction.
KRW 6 trillion is just the starting ticket — how big is the full commitment?
KRW 6 trillion covers only the initial Onyang expansion. According to Asan city disclosures, Samsung's master plan for the Onyang campus totals KRW 46 trillion, spanning new construction, future equipment additions and existing-line upgrades.
Across Onyang and Cheonan combined, Samsung plans to spend KRW 56 trillion on HBM packaging facilities.
This means → HBM packaging alone accounts for roughly 40 % of Samsung Group's KRW 140 trillion total investment plan for the Chungcheong region, which also covers advanced displays, next-generation batteries and AI-server packaging substrates.
Where does Samsung's HBM product roadmap stand right now?
Samsung expanded HBM4 shipments in Q2 2026 and has sent HBM4E samples to major customers.
The company expects server DRAM, enterprise SSD and HBM demand to accelerate in H2, keeping the overall memory market supply-tight even as mobile and PC demand softens.
In plain terms = the plant will not produce until 2029, but the market is short on capacity right now — the pace at which advanced HBM packaging expands over the three years between groundbreaking and production is the single variable investors need to watch most closely.
Content is for reference only, not financial advice.