DUV Lithography Cuts Data Center Laser Costs
Eulitha's shipped tools are now patterning AI-bound DFB lasers, with its capacity doubling near Zurich by Q1 2027.
Updated on Nov. 6, 2026 in Semiconductors
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Eulitha AG has announced deliveries of multiple automated deep-ultraviolet (DUV) lithography tools to foundries producing indium phosphide (InP) distributed feedback (DFB) lasers. The development is shipped: the tools have been delivered and used by several DFB manufacturers for a number of years.
Why it matters
DFB lasers used in AI data centers depend on high-resolution gratings, and Eulitha says volumes have grown sharply since 2025 as data center expansion accelerates. Customers chose Eulitha's photolithography over buying tens of electron-beam tools, which the company says saves significant cost.
Eulitha's DUV photolithography tools, built on its proprietary DTL technology, print the high-fidelity, high-resolution gratings that DFB lasers need for precise wavelength selection. The company reports a backlog that fills its capacity until mid-2028, but the announcement gives no throughput or resolution specifications.
The players
Eulitha AG
Swiss provider of high-throughput optical lithography solutions, whose proprietary DTL technology underpins its DUV tools for InP DFB laser production.
The details
A DFB (distributed feedback) laser is a semiconductor laser with a built-in grating, a periodic pattern of tiny ridges that selects a single precise wavelength of light. Printing that grating with the required fidelity is a patterning task, which is why lithography, the process of projecting patterns onto light-sensitive layers on a wafer, is central to manufacturing. Eulitha's tools use deep-ultraviolet light, a short-wavelength form of light, to print those gratings in an automated process. The approach is an alternative to electron-beam writing, a slower method that draws patterns with a focused beam of electrons.
Timeline
2025: Volume growth in demand for DFB laser tools began.
Q1 2027: Eulitha's doubled production capacity near Zurich is scheduled to come online.
Mid-2028: The company's order backlog is expected to fully occupy its production capacity.
The Tech Race
Eulitha's tools compete with electron-beam writing for the high-resolution patterning step in laser fabrication. The company's expansion and multi-year backlog suggest that photolithography is gaining ground in the manufacturing of optical components for AI infrastructure.
The change reaches people indirectly, through the optical components that carry data inside AI data centers and that are also used in optical communications and AR/VR/XR devices. Eulitha's stated capacity expansion targets this growing demand, but no consumer pricing or availability dates are given.
The takeaway
Demand for DFB lasers is rising with AI data center buildout, and Eulitha's photolithography approach is gaining orders against electron-beam alternatives. Watch whether the Zurich capacity doubling comes online in Q1 2027 as scheduled.
What happens next
Eulitha's Zurich-area production expansion is scheduled to come online in Q1 2027, and its order backlog is expected to fill capacity by mid-2028.
Further reading
For background on the chip-making processes behind this story, see the Semiconductors section.
Source note: This article includes information reported by AZoOptics.
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