The maker that dominates advanced chip packaging has contracted a competitor to produce a piece of its own process, a rare admission that the bottleneck sits in materials rather than transistors.
GlobalFoundries will manufacture silicon interposers for TSMC’s CoWoS packaging ecosystem at its site in Malta, New York. The interposer is the slab of silicon an accelerator die and its memory stacks sit on, carrying the wiring between them. It has become one of the tightest constraints in AI hardware, because packaging lines cannot be added at the pace customers add compute.
The agreement is worth $2B over its initial five-year term, with volume production expected to ramp in the first half of 2028. GlobalFoundries says the arrangement gives the United States its first domestic source of these parts.
The New York output will also carry embedded deep-trench capacitors, components that hold charge close to the die to steady voltage under sudden load.
Two things follow from the deal. Customers gain a second geography for a component that has until now come largely from Taiwan, a hedge that buyers of AI systems have been pressing for. And the packaging layer, long treated as back-end plumbing, is now being planned with the same lead times and capital commitments as a wafer fab.
For GlobalFoundries, it is high-volume work in a mature process, filling capacity that leading-edge customers do not want.
