The most advanced AI processors are not a single chip. They are several chips, logic and memory, mounted together on a base layer of silicon, in a process called advanced packaging. TSMC's version is called CoWoS. On Thursday GlobalFoundries said it would start making one of the components for it in New York, and described that as the first U.S.-based source.
GlobalFoundries said in its announcement that it had reached a manufacturing agreement with TSMC "to establish a U.S.-based supply of silicon interposers" for TSMC's CoWoS advanced-packaging ecosystem. GlobalFoundries will provide manufacturing services to TSMC and add fabrication capacity at its Malta, New York, plant. The initial term is five years. Tom's Hardware and Manufacturing Dive both put the value at $2 billion, as does the GlobalFoundries release, which describes a multi-year agreement with an initial five-year term.
What an interposer does
An interposer is a thin slice of silicon that sits underneath a processor and its memory stacks and carries the dense wiring between them. It is not the chip that does the computing. It is the part that lets several chips behave as one, which is why the packaging step matters so much to AI hardware. GlobalFoundries put it this way: "Advanced packaging is becoming increasingly critical to delivering the performance, power efficiency and scale required for next-generation AI systems," said Ed Kaste, senior vice president of the company's CMOS business.
GlobalFoundries expects to expand capacity at Malta and to "establish the first U.S.-based source of silicon interposers supporting advanced packaging technologies, including embedded deep trench capacitor components." Volume production is expected to begin ramping there in the first half of 2028, and the agreement "provides a foundation to expand capacity over time as customer demand grows."
Why it matters, and what it does not settle
Tom's Hardware reports that a U.S. source for the part would allow TSMC's customers to describe products as completely made and packaged in America. That is a marketing and procurement point as much as an engineering one. It matters for buyers who want a domestic supply chain, and it matters because the announced agreement does not say what share of TSMC's interposer demand Malta will cover, or how many wafers a year it will make. Neither company has said, in the releases and reports reviewed here.
It also leaves the rest of the packaging chain as it is, as far as the announcements say. The agreement covers interposer manufacture. It does not describe where the rest of the packaging would be done, and GlobalFoundries' own announcement is silent on that.
The deal is the latest in a series for GlobalFoundries, Manufacturing Dive noted, which has previously reached agreements with the Commerce and Energy departments, Renesas and others. TSMC has been investing heavily too: Manufacturing Dive reports that in July the White House and Commerce Department said TSMC planned an incremental $100 billion on four more Arizona facilities, taking its total U.S. investment to $265 billion across 12 sites.
The supply-chain reading
Much of the public argument over chip onshoring concerns the chips themselves. This announcement is about the less glamorous layer around them. It also lands in the same week that chip sales passed $1 trillion, when the demand pulling on every part of the chain, packaging included, has been unusually strong. It came a day after the Pentagon's Office of Strategic Capital offered Wolfspeed up to $1.5 billion for a different layer of the same chain. A component that is scarce in one place is a bottleneck. A component made in two places is a supply chain.
The test will come in 2028. Until Malta ramps, nothing changes in where these parts come from. The announcement is a commitment to change that, with a date, a location and a dollar figure. It is not yet a change.
The agreement, its $2 billion value, its five-year initial term, the Malta, New York, location, the first-half-2028 production ramp, the description of the first U.S.-based source of silicon interposers and the quotation from Ed Kaste are from GlobalFoundries' announcement of 8 October 2026. The description of the arrangement as one that lets TSMC's customers describe products as made and packaged in America, and the description of CoWoS are from Tom's Hardware, 8 October 2026. GlobalFoundries' earlier agreements with the Commerce and Energy departments and Renesas, and TSMC's $265 billion U.S. investment across 12 sites, are as reported by Manufacturing Dive on 9 October 2026. The analysis is our own.
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