# Leading-edge foundry

Part ID: 1.09 · Layer 1 (Compute silicon & packaging)

The advanced-node semiconductor fabs that manufacture the compute dies for essentially every AI accelerator on the market.

Foundry is where a chip design (from Merchant GPUs / accelerators, Hyperscaler custom ASICs, or Startup accelerators) becomes a physical wafer of dies. It sits upstream of silicon wafers as a raw material input and feeds directly into advanced packaging, where the finished die is combined with memory stacks and mounted onto a substrate. Almost every AI accelerator shipping today, regardless of which company designed it, is manufactured at the most advanced available process nodes, which means the finished-chip supply chain funnels through a small number of qualified fabs regardless of how many chip designers there are.
That concentration is the central fact investors need to hold onto for this part: demand growth for AI accelerators is, almost one for one, demand growth for advanced-node wafer capacity, and capacity additions at the most advanced process nodes take years and enormous capital, so the foundry side of the chain moves on a much slower clock than chip design announcements do. Qualification of a new process node is a multi-year undertaking for both the foundry and each customer's chip design, which makes switching suppliers between the handful of qualified providers a rare and consequential event rather than a routine one.

**AI delta:** Every additional AI accelerator design and unit sold is another wafer order at the most advanced process nodes, concentrating incremental demand at a small number of qualified fabs.

## Companies

| Company | Role | Confidence | Ownership | Ticker | Note |
|---|---|---|---|---|---|
| Intel | manufacturer | inferred | public | INTC | Foundry |
| Samsung Electronics | manufacturer | inferred | public | 005930.KS | Foundry |
| TSMC | manufacturer | inferred | public | 2330.TW | for essentially every AI accelerator shipping today |

Confidence tags: disclosed = company/filing statement; reported = trade press or partner list; inferred = taxonomy lead.