TSMC plans to build five additional advanced packaging plants in southern Taiwan, according to a report by the Seoul Economic Daily. The buildout marks one of the most aggressive packaging capacity commitments the company has disclosed to date and concentrates even more of its advanced back-end manufacturing on the island.

The report did not specify individual plant timelines, investment values, or capacity targets for the five facilities. TSMC has not yet commented publicly on the plan, and the company's confirmed statements should be treated separately from this reported roadmap.

What is clear is the direction. Southern Taiwan — anchored by TSMC's operations in and around Tainan and Kaohsiung — has become the center of gravity for the company's advanced packaging push. CoWoS, TSMC's chip-on-wafer-on-substrate family, packages logic dies alongside high-bandwidth memory stacks on silicon interposers. That step has become a bottleneck and a price-setter across the AI accelerator supply chain, because leading-edge GPUs and custom AI silicon depend on it to reach commercial volumes.

The five-plant expansion signals how TSMC views the constraint. Adding facilities in phases gives the company room to scale output as demand for AI hardware firms out or softens, without committing all capacity at once. It also keeps packaging physically close to front-end wafer fabrication in southern Taiwan, shortening the loop between 3nm-and-beyond logic production and the back-end integration that turns those wafers into shippable devices.

The geographic concentration carries commercial weight beyond logistics. Advanced packaging capacity in Taiwan ties global AI hardware supply to a single production cluster, and every added plant deepens that dependence for chip designers in the United States, Korea, and elsewhere. Customers building AI accelerators already queue for CoWoS-class capacity; five more plants in one region will relieve that queue on TSMC's schedule, not the buyers'.

For competitors, the move raises the bar. Samsung Electronics and others pursuing advanced packaging must now chase a supplier that appears willing to add capacity at cluster scale in its home market. For memory makers supplying high-bandwidth memory into those packages, TSMC's southern Taiwan footprint effectively defines where their stacks must integrate.

Investment figures, capacity numbers, and groundbreaking dates for the five plants remain undisclosed. If TSMC confirms the plan in upcoming earnings calls or supplier briefings, the next data points to watch are per-fab investment size, phased capacity ramps, and which packaging technologies each site will run. Until then, the Seoul Economic Daily report stands as the sole account of the expansion, and the competitive picture in advanced packaging will hinge on how quickly those five plants move from plan to production.