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The Chokepoint

Your weekly guide to the chokepoints in the AI supply chain

The Chokepoint

The Chokepoint #10: Analog Chips

Jul 8, 2026

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6 min read

The Chokepoint #10: Analog Chips

The AI shortage is spreading to chips designed forty years ago, made in fabs nobody builds anymore.

Teng Yan
Arvind
Teng Yan, +1

The Chokepoint

The Chokepoint #9: Selective Etching

Jul 1, 2026

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7 min read

The Chokepoint #9: Selective Etching

The 2nm bottleneck is somewhere else. One etch step, three suppliers.

Teng Yan
Arvind
Teng Yan, +1

The Chokepoint

The Chokepoint #8: Gas Turbines

Jun 24, 2026

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5 min read

The Chokepoint #8: Gas Turbines

Three companies make the world's big gas turbines. Two blade manufacturers decide how fast they can build them.

Teng Yan
Arvind
Teng Yan, +1

The Chokepoint

The Chokepoint #7: Optical Fibers

Jun 17, 2026

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5 min read

The Chokepoint #7: Optical Fibers

The AI fiber shortage is a glass-rod shortage and you can't make the rods on a GPU schedule.

Teng Yan
Arvind
Teng Yan, +1

The Chokepoint

The Chokepoint #6: Photonics Testing

Jun 10, 2026

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5 min read

The Chokepoint #6: Photonics Testing

AI's optical future depends on a test step only one company can run at scale

Teng Yan
Arvind
Teng Yan, +1

The Chokepoint

The Chokepoint #5: Power Transformers

Jun 3, 2026

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5 min read

The Chokepoint #5: Power Transformers

America's AI grid runs through one Pennsylvania steel mill

Teng Yan
Arvind
Teng Yan, +1

The Chokepoint

The Chokepoint #4: ABF Substrates

May 27, 2026

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5 min read

The Chokepoint #4: ABF Substrates

No high-end processor ships without a film made by Ajinomoto.

Teng Yan
Arvind
Teng Yan, +1

The Chokepoint

The Chokepoint #3: Power Semis

May 19, 2026

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5 min read

The Chokepoint #3: Power Semis

Power semiconductors are the new chokepoint.

Teng Yan
Arvind
Teng Yan, +1

The Chokepoint

The Chokepoint #2: Photonics

May 12, 2026

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5 min read

The Chokepoint #2: Photonics

Where the rent flows when light becomes the chokepoint

Teng Yan
Arvind
Teng Yan, +1

The Chokepoint

The Chokepoint #1: Power

May 6, 2026

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4 min read

The Chokepoint #1: Power

The rent is migrating from the fab to the substation.

Teng Yan
Teng Yan

Tessara

Independent research on the physical bottlenecks behind the AI buildout https://tessara.tech