TSMC says CoWoS capacity 'extremely tight' as AI demand surges

During TSMC's earnings conference held on July 16, chairman and CEO C.C. Wei delivered remarks on the company's outlook for AI demand. A central focus of his comments was the state of TSMC's CoWoS capacity—the advanced packaging process used to prepare high-performance AI chips for shipment. Wei characterized this capacity as 'extremely tight,' underscoring the severity of the supply constraint. The pressure on CoWoS reflects the relentless surge in AI chip orders, a trend that has made packaging—traditionally a less critical step—into a potential bottleneck that can delay customer deliveries. Complicating the situation is competitive pressure from Intel, whose EMIB (Embedded Multi-die Interconnect Bridge) packaging technology represents an alternative advanced packaging solution. Wei's remarks indicate that TSMC views EMIB as a real competitive threat and is motivated to defend its CoWoS market position. To address the capacity crunch, OSAT partners—independent companies that specialize in semiconductor assembly and testing—are undertaking expansion initiatives. These partners, including names not detailed in the earnings statement, are investing to increase their ability to handle TSMC's overflow packaging demand. The outcome of these expansion efforts will be pivotal: if OSAT partners can scale quickly and reliably, the packaging bottleneck may ease within months; if expansion stalls, delays in AI chip delivery could persist and potentially open doors for competitors offering faster turnaround times through their own packaging solutions.

TSMC's July 16 earnings announcement revealed that capacity constraints in CoWoS packaging remain a critical bottleneck despite strong AI demand. The company's chairman emphasized the severity of the tightness while acknowledging competitive threats from Intel's EMIB technology. This situation reflects the broader challenge facing the semiconductor industry: fabrication and assembly capacity have struggled to keep pace with the explosive growth in AI chip demand. By noting that OSAT partners—external companies specializing in assembly and testing—are actively ramping expansion, TSMC is signaling that the company cannot solve the packaging bottleneck alone and is relying on the broader ecosystem to scale. The competitive dynamic with Intel adds urgency, as delays in advanced packaging could give competitors an opening to capture market share in the high-margin AI segment.

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