The foundry model is a business structure where semiconductor manufacturing is sold as a service to chip-design customers.
The model converts fabs into platforms. A foundry is not merely renting cleanroom space; it provides process design kits, design rules, device models, standard-cell libraries, SRAM compilers, reliability data, mask operations, and manufacturing feedback. Customers build products on top of that platform without owning the factory.
| Platform element | Customer value | Foundry burden |
|---|---|---|
| PDK and design rules | Lets designers target a real process | Must stay accurate across process revisions |
| IP ecosystem | Speeds SoC integration | Requires qualification and support |
| Wafer capacity | Turns designs into silicon | Requires enormous capital spending |
| Yield learning | Improves cost and reliability | Requires data, process control, and customer collaboration |
The strategic edge is trust. The best foundries make customers feel that their IP, schedules, and product roadmaps are protected, while also delivering wafers at the yield and cadence the business case assumed.
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