The companies that build the machines, subsystems, materials, and test equipment used to manufacture semiconductors. Every leading-edge chip — whether an AI GPU, a memory die, or a power device — starts with deposition, etch, lithography, inspection, and test tools built by this supply chain. When fabs invest in new capacity or new process nodes, these are the companies that get paid first.
Why it matters
- Capex is the leading indicator. Fab tool orders show up 12–18 months before the chips do. Semiconductor equipment spending is one of the best forward-looking proxies for the AI hardware cycle.
- Installed base creates recurring revenue. Chambers, lasers, optics, and fluid systems all need spares and service. The installed-base flywheel means these companies earn even when new tool orders slow.
- Process complexity drives content. Gate-all-around transistors, EUV multi-patterning, advanced packaging, and hybrid bonding all increase the dollar content of equipment per wafer.
Roster
- AMAT — Applied Materials — the largest equipment supplier, with dominant share in deposition, etch, and CMP across logic and memory.
- ONTO — Onto Innovation — inspection, metrology, and lithography for advanced packaging and leading-edge fabs.
- CAMT — Camtek — inspection and metrology for advanced packaging, HBM, and compound semiconductors.
- ICHR — Ichor Holdings — gas and chemical delivery subsystems for etch and deposition chambers.
- UCTT — Ultra Clean Holdings — critical fluid delivery, gas panel, and chamber subsystems for front-end fabs.
- FORM — FormFactor — probe cards and test sockets for wafer-level testing of logic and memory chips.
- ENTG — Entegris — advanced materials, filters, and specialty chemicals for contamination control in leading-edge fabs.
- TER — Teradyne — automated test equipment (ATE) for semiconductor, wireless, and industrial applications.
- MKSI — MKS Instruments — power delivery, vacuum, lasers, photonics, and motion subsystems for semiconductor and electronics manufacturing.
- KEYS — Keysight Technologies — measurement and validation instruments for semiconductor, optical, RF, and defense electronics.
What to watch
- WFE spending forecasts — semi industry analysts' total wafer fab equipment estimates signal the cycle phase.
- Advanced packaging tool orders — CAMT, ONTO, AMAT all getting pulled into HBM, chiplet, and hybrid bonding inspection.
- DRAM and HBM capacity — HBM build-out requires new deposition, etch, and bonding capacity. Watch MU and SK Hynix announcements.
- China restrictions — export controls reshape the customer mix and margin profile for U.S.-traded equipment names.
- Gate-all-around ramp — the transition at TSMC, Intel, and Samsung drives new tool and materials requirements.