Theses›Semiconductor manufacturing›Lithography light sources

Lithography light sources

The EUV source stays with ASML and Gigaphoton; the only small opening is mask-inspection sources, and nobody has shown up there yet.

  • Bear
  • Early
  • $6.7B by 2035

The callBear for now, because the volume source is a two-supplier, sovereign-money layer and the side markets are tiny. If this is wrong the market goes from $2.4B to $6.7B by 2035 and an inspection-source company rides High-NA qualification.

D1D2R1R2R3C1C2foragainst D1D2R1R2R3C1C2foragainst
Fig. 1The balance. Drivers and catalysts against restraints, each block sized by its weight; catalysts hang dashed because they have not happened yet, sized by their odds. It tips toward the restraints.
  1. D122-plus EUV-capable fabs opening between 2025 and 2028 and High-NA arriving in 2027-28, each needing every new reticle qualified.
  2. D2Money is already chasing a new source architecture: xLight with up to $150M of CHIPS money and Substrate at a $1B+ Series A.
  3. R1The volume source sits inside two suppliers and the new-architecture bets are priced at $100M+, a sovereign bet rather than a seed one.
  4. R2The side markets are tiny and shrinking: the actinic inspection-source pool is about $45M and the best exit is Energetiq to Hamamatsu for $42M.
  5. R3ASML and the others are pulling drive lasers, droplet generators and debris control in-house, closing the parts market.
  6. C1ASML's High-NA EUV entering high-volume manufacturing at Intel, where half-field reticles need a new class of actinic mask inspection.2027-28
  7. C2A European inspection or metrology light-source company appearing at an early stage, the first sign the side market has a company in it.end-2027
Rests onthe beliefs underneath
Supported by · confidence
Threatened by · confidence
What would prove itdated tests, open and resolved
202720282029today123predictionswatch 202720282029today123predictionswatch
Fig. 2Each ring is a dated test: dashed while open, struck through when overdue, ticked or crossed once resolved.
  1. 1The seed-investable entry in the litho light-source layer is an inspection/metrology source or a source subsystem, NOT a leading-edge HVM source.Dec 2028 · open
  2. 2No leading-edge volume-source startup raising a seed a €30M fund could lead, while an inspection or specialty-source company does.Dec 2028 · open
  3. 3High-NA at Intel in high-volume manufacturing and whether actinic inspection of half-field reticles goes to a new entrant.Dec 2028 · open
Expressionslisted, private, technologies
  • ASMLASML Holding
    • full
     EUV monopoly + High-NA EUV ramp.
  • MKSIMKS Instruments
    • fair
     Vacuum + photonics for semi manufacturing + advanced packaging.
  • 6301.TGigaphoton (Komatsu)
    • not screened
     Sells argon-fluoride and krypton-fluoride excimer lasers for DUV scanners and develops EUV tin-plasma sources, to scanner makers and fabs.
  • 6920.TLasertec
    • full
     Sells ACTIS actinic EUV mask-inspection tools to fabs and mask shops, with a captive 13.5nm light source; it does not disclose the source supplier.
  • 6965.THamamatsu Photonics (Energetiq)
    • full
     Sells laser-driven plasma and EUV light sources for inspection and metrology tools, through Energetiq, which it bought for $42M in 2017.
Private · 2 private companies, 2 of them in the US.

xLight · Substrate

1 more private company tracked, not shown

Technologies
Who has already bet on itprivate rounds, from public sources

$140M raised by 2 companies, $140M of it in the last three years. Wave building: Money is arriving: recent rounds and tier-1 funds are in, but no runaway leader yet.

Backed by a top-tier venture firm: Substrate, xLight.

  • $100MSubstrate
    • Founded 2022
     Series A, Oct 2025 $100M (Founders Fund, In-Q-Tel, General Catalyst)
  • $40MxLight
    • Founded 2021
     Series B, Jul 2025 $40M (Playground Global, Boardman Bay Capital Management, Morpheus Ventures)
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