Samsung Breaks Ground on $4.5B HBM Packaging Plant, Targets 2028 Start

Samsung Electronics has started building a 6 trillion won ($4.48 billion) high-bandwidth memory packaging plant in Asan, South Korea, with production set to begin in June 2028 — a year ahead of the original schedule.

South Korea's Ministry of Trade, Industry and Energy announced the groundbreaking on November 12. The project is the first construction start under the government's regional industrial mega-project program.

The new facility sits at Samsung's Onyang campus. It will add advanced packaging capacity for HBM, the stacked memory used in AI accelerators. Equipment is the bigger line item: Samsung plans to install about 40 trillion won of advanced machinery in stages on top of the 6 trillion won construction cost. That takes the medium- and long-term investment tied to the Onyang HBM expansion to roughly 46 trillion won.

Why packaging, not just wafers?

Advanced packaging is a separate manufacturing step from producing memory wafers. It connects stacked memory dies with processors and other components through high-speed links. That makes packaging capacity a genuine bottleneck on finished HBM supply — you can't ship HBM without it.

The plant will carry three clean-room floors covering about 31,000 square meters. Samsung is pulling the opening forward as demand rises for server memory used in AI systems. During its third-quarter earnings announcement, the company said it had completed negotiations over HBM supply volumes for 2027 while customers continued to seek additional supply, Reuters reported.

What Samsung hasn't disclosed: planned output capacity, customer commitments or expected financial returns. The 40 trillion won equipment component follows the construction spending in phases over several years.

How big is the Chungcheong investment wave?

The Onyang project anchors a broader investment program across South Korea's Chungcheong region. According to the ministry:

• Samsung Electro-Mechanics is investing 8 trillion won in package-substrate production for graphics processors and central processing units.
• Samsung Display is investing 67 trillion won in an 8.6-generation production line for IT displays.
• 112 materials, components and equipment suppliers around the Chungcheong projects hold additional investment plans totaling about 23.6 trillion won.

Samsung Electro-Mechanics separately disclosed in September that it would invest 4.27 trillion won in South Korea and 2.51 trillion won in Vietnam to expand flip-chip ball grid array substrates for AI servers and other high-performance computing applications. That expansion is scheduled to start mass production in September 2028.

The South Korean government said it will back the projects by coordinating permits and helping secure electricity, water and transport infrastructure.

What's the so-what?

Roughly 46 trillion won committed to one HBM packaging site, with a start date pulled forward to June 2028, signals how hard AI-server memory demand is squeezing the supply chain — and how much of the response depends on packaging capacity rather than wafer output alone.

By Grace Kim