THE SILICON MOAT

An advanced AI accelerator passes through ten industrial links before it reaches a server. Those links include design automation, silicon substrates, photoresist, process gases, EUV lithography, fab equipment, masks and pellicles, leading-edge foundry, advanced packaging and HBM, test and assembly. The layers are serial. Strength in one does not compensate for the absence of another.

Most supply-chain maps answer a descriptive question — who makes what. This book answers a harder one: if a link became unavailable under a defined failure mode, how long would it take to build a credible route around it?

That question becomes the Substitutability Index, an ordinal S1-to-S5 scale measuring industrial route-around time, applied to all ten links and dated to a stated evidence cut-off. Two links score S5 — no demonstrated route around within a decade. Three score S2. Every score carries the evidence that would force a revision.

Inside:

• The ten dated assessments, from under one year to more than a decade
• Export controls, allied alignment, and where multilateral control stops working
• Substitution strategies, node labels versus manufacturing capability, and tacit process knowledge
• Rebuilding programmes — and the power, water and site constraints beneath every fab
• Valuing industrial duration: separating route-around time from company excess returns
• The hidden moats: multi-beam mask writers, probe cards, RF power delivery, vacuum control, optical packaging
• A dependency matrix, a glossary, a chronology from 1958, and a monitoring framework to 2030

Written for investors, analysts and policy readers who already know what TSMC and ASML are — and need to know what happens if one of them stops.

This book does not provide investment advice. It contains no price targets and no recommendations to buy, hold or sell any security.