TSMC's Packaging Monopoly: The AI Choke Point Nobody Fixed

For years, the AI chip race was about shrinking transistors. Now, the bottleneck is something far more mundane: how to stack and connect those chips. Advanced packaging, led almost exclusively by Taiwan's TSMC, has become the single point of failure for the entire AI supply chain.

Advanced chip packaging, specifically TSMC's CoWoS (Chip-on-Wafer-on-Substrate), has become the critical bottleneck for AI chip production, with TSMC controlling over 90% of the market.
The US CHIPS Act focused on fabrication but ignored packaging, leaving the entire AI supply chain dependent on a single Taiwanese company.
This dependence creates a geopolitical vulnerability: any disruption in Taiwan could halt the production of NVIDIA, AMD, and other AI chips globally.

Why Is Advanced Chip Packaging Suddenly the AI Bottleneck?

According to the New York Times, the AI boom has shifted the semiconductor bottleneck from transistor miniaturization to advanced packaging. As chip designers hit physical limits on shrinking transistors, they have turned to stacking multiple chips vertically and connecting them with high-bandwidth interconnects. This technique, known as 2.5D or 3D packaging, dramatically boosts computing power for AI workloads. The dominant technology is TSMC's CoWoS (Chip-on-Wafer-on-Substrate), which is used in NVIDIA's H100 and B200 GPUs, AMD's MI300X, and nearly every other high-end AI accelerator. The problem is that TSMC has a near-monopoly on this process, with over 90% market share. The NYT reported that TSMC's packaging capacity is already sold out through 2027, creating a supply chain logjam that no other company can quickly resolve.

Did the US CHIPS Act Miss the Real Problem?

Yes, and the evidence is clear. The US CHIPS Act of 2022 allocated $52 billion to boost domestic semiconductor manufacturing, but nearly all of it went to advanced logic fabrication (e.g., TSMC's Arizona fabs, Intel's Ohio fabs). The New York Times noted that packaging was treated as an afterthought, despite it being the fastest-growing bottleneck. According to a Reuters analysis from 2025, the US Department of Commerce allocated less than $3 billion specifically for advanced packaging, a fraction of what is needed. This means that even if TSMC's Arizona fabs produce leading-edge chips, those chips will still need to be shipped back to Taiwan for packaging, negating the entire purpose of reshoring. The US has essentially built a highway to a dead end.

TSMCs Packaging Monopoly: The AI Choke Point Nobody Fixed

Who Stands to Gain from This Packaging Crisis?

The biggest winner is TSMC itself. The company's monopoly on CoWoS packaging gives it immense pricing power and strategic leverage. The NYT reported that TSMC is using this leverage to demand higher prices and longer-term commitments from customers like NVIDIA and AMD. The losers are everyone else: Intel, which is trying to develop its own packaging technology (Foveros) but remains years behind; Samsung, which has its own packaging but lacks TSMC's ecosystem and yield; and the entire US government, which has spent billions on fabrication without solving the packaging bottleneck. The real winners, however, might be the geopolitical adversaries. According to the NYT, China is actively investing in its own packaging capabilities, recognizing that this is a more achievable target than leading-edge fabrication.

Company	Packaging Technology	Market Share (2026 est.)	Verdict
TSMC	CoWoS, InFO	90%+	Dominant monopoly
Samsung	I-Cube, H-Cube	5%	Trailing, but investing
Intel	Foveros, EMIB	3%	Years behind, but has US government support
ASE Group	Fan-out, SiP	2%	Niche player, not competitive for AI
Verdict			TSMC's monopoly is unassailable in the short term. No competitor will match CoWoS yield or capacity before 2028.

Can Any US Company Break TSMC's Packaging Stranglehold?

Unlikely in the near term. Intel's Foveros technology is promising but has faced delays and yield issues. According to the NYT, Intel's packaging capacity is a fraction of what TSMC can produce, and its customers (including Amazon and Microsoft) are still reliant on TSMC for high-volume AI chips. Samsung's packaging is improving but is not trusted by major US chip designers for flagship products. The US government's Advanced Packaging Manufacturing Program (APMP) is still in early stages, with no commercial output expected before 2028. The fundamental problem is that TSMC has a decade-long head start in process integration, materials science, and customer relationships. As the NYT reported, TSMC's packaging engineers work closely with chip designers from the earliest stages, creating a lock-in that is extremely hard to break.

My thesis is simple: the US semiconductor strategy is fundamentally flawed because it ignored the packaging bottleneck. The CHIPS Act was a fabrication-first approach that assumed the rest of the supply chain would follow. It hasn't. The short-term consequence is that every AI chip from NVIDIA, AMD, and even Google's TPUs depends on a single factory in Taiwan. The long-term consequence is that the US will remain vulnerable to geopolitical blackmail or natural disasters in Taiwan for at least another decade. The winners are TSMC and any company that can bypass advanced packaging (e.g., through optical interconnects). The losers are US chip designers who have no alternative. My prediction: by 2028, the US government will be forced to subsidize a second packaging source, likely Intel, but it will be too late to prevent a major supply disruption.

By Q1 2028, the US Department of Commerce will announce a $10 billion+ subsidy package specifically for advanced packaging, targeting Intel and Samsung.
TSMC will raise CoWoS prices by at least 20% by the end of 2027, citing capacity constraints and geopolitical risk premiums.
By 2029, at least one major US cloud provider (likely Amazon AWS) will design a custom AI chip that uses an alternative packaging technology from a non-TSMC supplier, accepting lower performance for supply chain security.

2022
US CHIPS Act Passed
$52 billion allocated for semiconductor manufacturing, with minimal focus on advanced packaging.
2023
CoWoS Becomes Critical
TSMC's CoWoS packaging becomes the standard for AI accelerators like NVIDIA H100.
2024
Packaging Capacity Crunch
TSMC announces packaging capacity is sold out through 2027, causing delays for AI chip shipments.
2025
US Government Acknowledges Gap
Reuters reports that the US Department of Commerce allocates less than $3 billion for packaging, far below what is needed.
2026
NYT Exposes the Choke Point
The New York Times reports that advanced chip packaging has made the US more reliant on Taiwan than ever.

Advanced Packaging Market Share by Company (2026, estimated)

The US CHIPS Act's focus on fabrication was a strategic error; packaging is now the binding constraint.
TSMC's CoWoS monopoly means that even reshored fabrication doesn't reduce Taiwan dependence.
Intel and Samsung are years away from being credible alternatives for high-volume AI packaging.
Geopolitical risk is now embedded in every AI chip supply chain, not just at the logic level but at the packaging level.
The next AI supply chain crisis will likely be triggered not by a fabrication disruption but by a packaging one.