Chip packaging company Amkor Technology has signed a multi-year, $1.5 billion strategic partnership with Nvidia, the two companies announced. The deal is aimed at expanding Amkor's advanced semiconductor packaging and testing capacity for what both describe as next-generation AI infrastructure.

According to Bloomberg, as reported by Techmeme, the agreement includes a prepayment from Nvidia intended to help bolster Amkor's chip packaging facility in Arizona. Stock Titan reports that the plan spans both Arizona and Asia, extending the collaboration across Amkor's global footprint rather than a single site.

Investors responded quickly. Investing.com reported that Amkor shares surged 16% on the news, and Bloomberg noted that AMKR jumped more than 16% in after-hours trading following the announcement.

The context here matters more than the headline number. "Packaging" is the often-overlooked final stage of chipmaking, where individual silicon components are assembled, connected and tested into the finished product. For advanced AI processors like Nvidia's, this step has become a genuine bottleneck — the chips are so complex that how they are packaged directly affects performance and how many can be produced.

By putting money in upfront through a prepayment, Nvidia is effectively helping fund the capacity it will later rely on, a sign of how aggressively it is trying to lock in supply. As one Yahoo Finance analysis framed it, investors are now debating whether that optimism is already priced into Amkor's stock after the jump.

Why it matters: the deal shows that the race to build AI hardware is no longer just about designing faster chips — it is increasingly about securing every link in the manufacturing chain, including the packaging steps that turn silicon into shippable products, and about bringing more of that capacity to the United States.