Semiconductor Supply Chain
The semiconductor supply chain transforms raw materials — primarily silicon, rare earth elements, and ultra-pure specialty chemicals — through lithography, deposition, and etching into the logic chips, memory, and power semiconductors that underpin every digital device on earth. It is the most technically concentrated industrial supply chain in existence: a single Taiwanese manufacturer (TSMC) produces over 90% of the world's leading-edge logic chips, and a single Dutch company (ASML) is the sole global supplier of extreme ultraviolet (EUV) lithography machines — the tool without which advanced chips cannot be made.
Step-by-Step Value Chain
4 steps from upstream extraction to end use. 3 chokepoints where supply disruptions have systemic impact.
Manufacture of Computers and Peripheral Equipment
Data centre processors, AI accelerators, consumer and enterprise computing
Manufacture of Communication Equipment
Smartphones, 5G base stations, networking equipment
Manufacture of Electric Motors, Generators and Transformers
Power semiconductors, SiC and GaN devices for EV and industrial applications
Where This Chain Is Most Vulnerable
Chokepoints are steps where geographic concentration, technical barriers, or long lead times create structural supply risk with limited short-term alternatives.
Rare Earth & Specialty Mineral Extraction
China controls ~85% of rare earth processing. Gallium and germanium export restrictions imposed 2023. Neon, argon, and krypton concentration in Ukraine demonstrated supply fragility when disrupted by the 2022 invasion.
Geopolitical — SovereigntyAdvanced Logic Fabrication — TSMC Taiwan Concentration
TSMC produces >90% of sub-5nm logic from Taiwan. ASML holds global monopoly on EUV machines. Taiwan Strait risk is the single most-discussed systemic supply chain risk in the global economy as of 2024.
Geopolitical — Competitive ControlDetailed Step Breakdown
Each step's role in the chain, key data points, and chokepoint detail where applicable.
Mining of Other Non-Ferrous Metal Ores
Supplies the primary material inputs: polysilicon (from quartz/silica), rare earth elements (neodymium, lanthanum, cerium for dopants and magnets), and tungsten (for interconnects). China dominates rare earth extraction with ~60% of global mine production and ~85% of global processing. Silicon itself is abundant but electronic-grade polysilicon requires purity of 99.9999999% (nine nines) — achieved only by a handful of global producers.
- China controls ~60% of global rare earth mining, ~85% of processing (USGS 2024)
- Gallium and germanium export controls (China, 2023) affected compound semiconductor fabs within weeks
- Electronic-grade polysilicon: Wacker (Germany), OCI (Korea), Hemlock (US) are primary non-Chinese suppliers
- Quartz sand for silicon: The Spruce Pine deposit (North Carolina) produces ~90% of the world's highest-purity quartz
Manufacture of Basic Chemicals
Produces the process chemicals consumed in wafer fabrication: ultra-high-purity (UHP) gases (nitrogen trifluoride, hydrogen fluoride, argon, neon), photoresists for lithography, chemical mechanical planarisation (CMP) slurries, and wet etch chemicals. These are consumed in large volumes during fabrication but are not present in the finished chip. Japan and Germany dominate specialty chemical supply; neon (critical for KrF lasers) was 70% sourced from Ukraine before the 2022 invasion disrupted supply.
- Neon gas: Ukraine supplied ~45-54% of semiconductor-grade neon before the 2022 invasion (Reuters)
- EUV photoresists: only JSR (Japan), Shin-Etsu Chemical, and Tokyo Ohka Kogyo are qualified suppliers
- HF (hydrofluoric acid): critical for oxide etching; South Korea imports ~40% from Japan (2019 export controls caused shortage)
- CMP slurries: CMC Materials and Cabot Microelectronics (US), Fujimi (Japan) dominate
Manufacture of Electronic Components and Boards
The core transformation step: silicon wafers are processed through hundreds of lithography, deposition, etching, and doping cycles to create transistors at nanometre scale. Leading-edge logic (sub-5nm) is exclusively produced by TSMC (Taiwan), Samsung (South Korea), and Intel (US — rebuilding). TSMC alone produces >90% of chips below 5nm and >60% of all advanced logic. A single EUV-equipped fab costs $20-30B to build. The equipment supply chain is even more concentrated: ASML holds a global monopoly on EUV lithography machines (~€350M each).
- TSMC: ~54% global foundry revenue share, >90% of sub-5nm logic chips (TrendForce 2024)
- ASML: sole global supplier of EUV machines; backlog >2 years; ~€350M per unit
- US CHIPS Act ($52B) and EU Chips Act (€43B) aim to reduce geographic concentration by 2030
- Memory: Samsung and SK Hynix (South Korea) + Micron (US) dominate DRAM; Samsung + SK Hynix + Kioxia dominate NAND
Manufacture of Computers and Peripheral Equipment — computing
The dominant demand driver for leading-edge logic: CPUs (Intel, AMD), GPUs (NVIDIA, AMD), and AI accelerators (NVIDIA H100/B100, Google TPU, Amazon Trainium) all fabricated at TSMC or Samsung. AI infrastructure build-out is creating unprecedented demand growth — NVIDIA's H100 GPU requires advanced packaging and >100 billion transistors per chip. The AI datacenter boom has caused multi-year GPU allocation waitlists.
- NVIDIA: ~80% AI accelerator market share; H100/B100 GPU fabricated exclusively at TSMC on 4nm/3nm
- AI inference demand growing ~50% annually — primary driver of advanced logic capacity constraints (2024)
- Advanced packaging (CoWoS, HBM integration) becoming new bottleneck alongside wafer fab
Manufacture of Communication Equipment — communications
Mobile application processors (Apple A-series, Qualcomm Snapdragon, MediaTek Dimensity) and 5G baseband chips are the highest-volume customers for leading-edge TSMC nodes. Smartphones consume ~45% of global foundry capacity by revenue. 5G infrastructure chips (Ericsson, Nokia, Huawei — now restricted) add significant volume at mature nodes.
- Apple is TSMC's largest single customer (~25% of TSMC revenue)
- US export controls on Huawei (2019-2020) redirected significant TSMC capacity to US-aligned customers
- 5G mmWave chips require III-V compound semiconductors (GaAs, GaN) — different supply chain branch
Manufacture of Electric Motors, Generators and Transformers — electrical equipment
Power semiconductors (IGBTs, MOSFETs, SiC diodes) enable efficient power conversion in electric vehicles, industrial drives, and renewable energy inverters. This segment uses mature process nodes (150-200mm wafers) but is experiencing surging demand from EV electrification. Silicon carbide (SiC) is displacing silicon at high voltages — STMicroelectronics and Wolfspeed are racing to scale SiC wafer production.
- SiC power devices: market growing at ~30% CAGR driven by EV traction inverters
- Infineon, STMicroelectronics, ON Semiconductor dominate SiC MOSFET market
- 200mm SiC wafer transition (from 150mm) is a supply bottleneck through 2026
Where Margin Is Captured
Rough indication of value capture at each step — what creates pricing power and where the chain's economic returns concentrate.
| Step | Value Capture | Margin Driver |
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Step 1
Mining of Other Non-Ferrous Metal Ores
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Commodity mineral pricing with episodic spikes when export controls bite. Rare earth miners earn moderate margins; polysilicon producers earn windfall margins in solar demand surges. |
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Step 2
Manufacture of Basic Chemicals
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Specialty chemical producers earn premium margins from high-purity qualification barriers and single-source status at major fabs. Switching costs are extremely high once qualified. |
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Step 3
Manufacture of Electronic Components and Boards
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TSMC earns gross margins of ~53-55% (2024). Leading-edge nodes are priced at $20,000+ per wafer (3nm). Long-term supply agreements and technology lock-in sustain pricing power. Equipment vendors (ASML, Applied Materials, Lam Research) also earn 45-60% gross margins. |
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Step 4 — Computing
Manufacture of Computers and Peripheral Equipment
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NVIDIA earns ~75% gross margins on H100/B100 GPUs — the highest in the chip industry. AI infrastructure scarcity creates extreme pricing power. Fabless chip design is the highest-return model: no fab capex, but dependent on TSMC for execution. |
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Step 4 — Communications
Manufacture of Communication Equipment
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Apple earns ~45% gross margins with A-series chip differentiation as core moat. Qualcomm earns 55-60% gross margins on Snapdragon licensing model. |
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Step 4 — Electrical Equipment
Manufacture of Electric Motors, Generators and Transformers
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Power semiconductor vendors earn 30-40% gross margins. SiC premium over Si provides temporary pricing power. Industrial and automotive customers accept premium for reliability. |
Industries That Enable This Chain
These industries do not transform the primary product but are essential for the chain to function — logistics, finance, professional services, and enabling technology.
Manufacture of Other General-Purpose Machinery
Semiconductor manufacturing equipment: photolithography (ASML), deposition (Applied Materials, Lam Research), etching (Lam, Tokyo Electron), inspection (KLA), and ion implantation (Axcelis). The equipment supply chain is even more geographically concentrated than fab production — 4 US companies and ASML control the critical nodes. US export controls on advanced chip equipment are the primary geopolitical lever.
Manufacture of Basic Chemicals
Specialty chemicals already covered in step 2 but also includes silicon wafer production (Shin-Etsu, SUMCO, Siltronic, SK Siltron) as substrate input. 300mm wafer supply is concentrated in Japan and South Korea.
Research and Experimental Development on Natural Sciences and Engineering
R&D at universities (MIT, Stanford, IMEC in Belgium) and corporate labs advancing node shrinkage roadmaps (beyond 2nm), new materials (2D materials, III-V on Si), advanced packaging, and quantum computing. IMEC's role as neutral R&D hub for TSMC/Samsung/Intel is unique in the global technology landscape.
Other Monetary Intermediation
Project finance for gigafab construction ($20-30B per leading-edge facility), government grants (CHIPS Act, EU Chips Act), and venture capital for fabless chip design startups. Subsidised finance is now a strategic tool: TSMC's Arizona fabs received ~$6.6B in CHIPS Act direct grants.
Trends Shaping This Chain
Forward-looking macro forces creating headwinds or tailwinds across this supply chain. Sorted by intensity — critical pressures first.
AI & Machine Learning
Demand for AI accelerators (GPU, TPU, custom ASICs) is reshaping semiconductor fab priorities.
Critical Minerals Race
Gallium, germanium, and rare earth elements are essential inputs for compound semiconductors.
Tariffs & Trade Policy
Export controls and tariffs on semiconductor equipment and advanced chips are fragmenting the global supply chain.
Data Centre & AI Infrastructure Buildout
AI accelerators (GPUs, TPUs, custom ASICs) are the highest-value component driving the data centre buildout.
Electrification & Mobility Transition
EVs contain 3–5x more semiconductor content than ICE vehicles, with power electronics as the key driver.
ESG & Supply Chain Due Diligence
Semiconductor supply chains involve minerals and labour practices subject to CSDDD human rights due diligence.
Geopolitical Fragmentation & Friend-Shoring
Geopolitical fragmentation is the primary structural force reshaping the semiconductor supply chain.
Net Zero Transition & Decarbonisation
Semiconductor fabs are highly energy-intensive; advancing process nodes increases energy use per chip.
Reshoring & Nearshoring
CHIPS Act and allied-nation fab subsidies are triggering the largest semiconductor manufacturing reshoring in decades.
Circular Economy & Extended Producer Responsibility
WEEE Directive expansion and RoHS restrictions add compliance costs for electronic component producers.
Digital Twins
Fab process twins are reducing yield loss and enabling faster process node transitions.