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Semiconductor Business Models
Semiconductor business models divide chip design, wafer manufacturing, packaging and testing among different companies, or keep them inside one. The main models are the fab, the foundry, the integrated device manufacturer (IDM), the fabless company, the outsourced semiconductor assembly and test (OSAT) provider, and the electronics manufacturing services (EMS) provider or original equipment manufacturer (OEM). Each one sets where a company's supply chain strengths and risks sit.
Fab, Foundry, IDM, Fabless, OSAT and EMS/OEM
- Fab (fabrication plant): a physical facility where wafers are processed into semiconductor devices, with cleanrooms, lithography tools, deposition systems and metrology equipment. Examples are TSMC Fab 18 in Taiwan and Samsung's fab in Taylor, Texas. See Semiconductor Fabs.
- Foundry: a company that manufactures chips for outside customers, mostly fabless firms, and does not design its own chips. Pure-play foundries such as TSMC and UMC dominate this model.
- IDM: a company that designs, manufactures, packages and sells its own chips in fabs it owns, often fully vertically integrated. Examples are Intel, Texas Instruments and Samsung.
- Fabless: a company that designs chips and outsources manufacturing to foundries. Fabless firms lead high-growth markets such as AI accelerators, GPUs and wireless systems-on-chip (SoCs). Examples are NVIDIA, Qualcomm, AMD and Broadcom. See Fabless Semiconductor Companies.
- OSAT: a specialist that provides back-end packaging, assembly and test services. Examples are ASE, Amkor and JCET. See OSAT.
- EMS and OEM: EMS providers and OEMs build chips into finished systems such as smartphones, servers and vehicles. Examples are Foxconn, Flex, Apple and Tesla. See EMS and OEM.
Semiconductor Business Model Comparison
| Model | Design Chips? | Manufacture Chips? | Package/Test? | Example Companies |
|---|---|---|---|---|
| Fab | No | Yes (facility only) | No | TSMC Fab 18, Samsung Taylor Fab |
| Foundry | No | Yes (for customers) | Sometimes | TSMC, GlobalFoundries, UMC |
| IDM | Yes | Yes (in-house) | Yes | Intel, Samsung, TI, Micron |
| Fabless | Yes | No (outsourced) | No | NVIDIA, Qualcomm, AMD, Broadcom |
| OSAT | No | No | Yes | ASE, Amkor, JCET |
| EMS/OEM | No | No (system assembly) | N/A | Foxconn, Apple, Tesla, Dell |
Business Model Tradeoffs
- Resilience: heavy reliance on a few foundries, TSMC above all, creates geopolitical and supply chain risk.
- Vertical and horizontal structure: IDMs keep design and manufacturing under one roof for control, while the fabless and foundry split lets each side specialize.
- Capital intensity: a fab costs $10 billion to $20 billion or more, which favors large companies or national subsidies such as the U.S. CHIPS Act.
- Innovation: fabless firms drive design advances in AI, GPUs and 5G, while foundries drive process node scaling to 3nm, 2nm and gate-all-around (GAA) transistors.
Related Coverage
Fabless Design & IP Cores | Semiconductor Bottleneck Atlas | Semiconductor Bottleneck Atlas: Detailed Rankings | Semiconductor Process Inputs Overview | Silicon Wafer Production Overview | U.S. Semiconductor Reshoring | U.S. Semiconductor Supply Chain Bottlenecks