SK hynix bets $4 billion on US AI memory production
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SK hynix has started construction on a more than $4 billion high-bandwidth memory production site in Indiana, placing a key part of the AI chip supply chain closer to US customers.
The South Korean memory maker held a groundbreaking ceremony in West Lafayette on Aug. 27. It plans to open the site’s cleanroom by October 2028 and begin mass production of next-generation HBM in the second half of 2029.
The Indiana facility will be SK hynix’s first HBM production base in the US. The company expects it to employ about 1,000 people during commercial operations. The wider project could support about 7,000 direct and indirect jobs and involve more than 100 suppliers and partners.
For US technology companies, the importance of the project goes beyond its investment value. HBM has become a key part of AI computing systems because processors need to move large amounts of data at high speed.
SK hynix is building capacity in a part of the market that is closely tied to the growth of AI infrastructure.
Advanced packaging is becoming more important to the AI supply chain
The Indiana plant will not produce every part of an HBM chip from start to finish.
SK hynix plans to manufacture semiconductor wafers in South Korea before sending them to Indiana for advanced packaging and testing. Finished products will then be supplied to US customers.
That division of work matters.
HBM is made by stacking multiple DRAM memory chips and connecting them so they can transfer data faster than conventional memory. This design is useful for AI processors, which need rapid access to large amounts of data.
Advanced packaging allows manufacturers to stack and connect chips in ways that improve performance. It has become a more important stage in semiconductor production as chipmakers look for performance gains that do not rely only on making individual components smaller.
The US Department of Commerce described advanced packaging as a gap in the domestic semiconductor supply chain when it announced financial support for the SK hynix project in 2024.
The department awarded the company up to $458 million in direct CHIPS funding and made up to $500 million in loans available. The support was linked to an investment then valued at about $3.87 billion.
SK hynix now values the project at more than $4 billion.
The result is a more distributed production model rather than a fully domestic US HBM supply chain. Wafer production will remain in South Korea, while packaging, testing and related research will take place in Indiana.
For customers, bringing those later production stages closer to the US could reduce some of the geographic concentration in the AI hardware supply chain.
A 2029 production target shows how far ahead memory makers must plan
SK hynix expects mass production at the Indiana site to begin in the second half of 2029. The company also plans to use the site for advanced packaging research and next-generation HBM development.
That timetable shows one of the main problems facing semiconductor suppliers.
AI computing demand can change quickly, but new semiconductor capacity takes years to plan, build, equip and qualify. Memory suppliers have to commit billions of dollars well before they know exactly what customer demand will look like when a new plant opens.
SK hynix is making similar long-term investments in South Korea. In August, it announced plans to invest 54 trillion won in new production facilities at Yongin and Cheongju to support future AI memory demand.
Indiana should be viewed as part of that wider expansion.
The company is not replacing its Korean manufacturing base. It is adding capacity in the US while keeping the two production networks closely linked.
That approach may become more common as semiconductor companies respond to two pressures. They need large and efficient manufacturing centers, while customers and governments also want supply chains that depend less on a small number of locations.
Indiana is being built as a research and production cluster
SK hynix is also linking the plant with Purdue University.
The company plans to establish an advanced packaging research and development testbed alongside its manufacturing lines. Purdue and SK hynix will work together on areas including advanced packaging and next-generation HBM technology.
That partnership could have long-term value for the region.
Semiconductor plants need engineers, technicians, suppliers, research facilities and specialist infrastructure. Building those capabilities in one region can make future investment easier by reducing the need to develop each project in isolation.
The Commerce Department has described the Purdue partnership as part of an effort to build a semiconductor research base in Indiana.
For Indiana, the project therefore has two roles. It is a manufacturing investment, but it is also an attempt to build local skills and research capacity around advanced memory packaging.
For SK hynix, the location also puts production closer to some of the world’s largest AI technology customers.
The Indiana plant will not make the US semiconductor supply chain independent from overseas production. Its wafers will still come from South Korea, and semiconductor manufacturing will remain highly international.
The more immediate change is that a high-value stage of HBM production is moving closer to US AI demand.
If demand for AI computing continues to rise through the end of the decade, that additional packaging capacity could give SK hynix and its customers more flexibility over where finished memory is produced.
The Indiana investment points to a broader shift in semiconductor strategy. Companies are still relying on global production networks, but they are placing more important parts of those networks closer to major customers, research centers and end markets.
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