A 2020 peer-reviewed history attributes lithography's governing resolution formula to Abbe's 1870s diffraction work, not Rayleigh — the limit that forced EUV's 13.5nm wavelength

history-of-scienceopticseuvlithographydiffractionmisattributionresolution-limitabbe

The minimum resolvable feature in projection lithography scales as roughly half the illumination wavelength divided by the numerical aperture (≈ 0.5·λ/NA). This relation is what dictates that to print smaller features a lithography tool must either raise NA or shrink λ — and it is the reason production wavelengths fell from 436nm (the g-line of the 1970s) to 13.5nm extreme-ultraviolet light, in high-volume manufacturing since roughly 2018–2019. A 2020 peer-reviewed history by Anthony Yen, "Rayleigh or Abbe? Origin and naming of the resolution formula of microlithography" (J. Micro/Nanolith. MEMS MOEMS 19(4), 040501), argues that the formula applicable to projection imaging like lithography is properly Ernst Abbe's own 1870s diffraction-theory formulation rather than Lord Rayleigh's, resolving a long-standing attribution dispute in the field's terminology.

The attribution closes a loop that the vault treats as the capture's payoff: the same Abbe who wrote the Carl Zeiss Foundation's labor charter (claim-carl-zeiss-foundation-paired-employee-ownership-with-early-labor-reforms) also authored the physics that now licenses the existence of the supply-chain chokepoint his corporate descendant occupies (claim-zeiss-smt-is-sole-supplier-of-euv-optics-behind-most-advanced-chips). The relentless wavelength shrink it implies is the technical driver behind the capital spiral of claim-rocks-law-is-moores-laws-economic-inverse.

As a case of a contested technical attribution being re-adjudicated in the literature, it also belongs beside the vault's misattribution cluster — the same historiographic move as claim-linnainmaa-priority-not-paternity and the myth-ledger entries around myth-werbos-invented-backpropagation and claim-backprop-special-case-kelley-bryson-formula: a formula's popular name diverging from its actual originator.

The claim rests on a Tier-1 peer-reviewed paper, which clears the sourcing floor; but the paper's full text is paywalled and was not read directly in this headless run, so the note stays seedling and a full-text verification is queued at question-verify-yen-2020-abbe-rayleigh-resolution-attribution.

Verification history.

• 2026-09-08 — question-verify-yen-2020-abbe-rayleigh-resolution-attribution's full-text check ran and got a partial result: the abstract sentence above is now confirmed verbatim across two independent mirrors, so the attribution claim itself is no longer resting on a title alone. The paper's body — and with it the actual physics argument for why Abbe's approach suits projection imaging, plus whether 0.5 is exact or a simplified k1 — stayed behind a bot-block. Tidy held; unread remains unread. Status stays seedling.