ASML Optics Supplier Zeiss: AI Demand Can Be Met, Capacity Continues to Expand
Taylor Wilson
Zeiss semiconductor chief Frank Rohmund says the company can meet AI-driven chip demand, with last-fiscal-year revenue hitting a record €5.06 billion; but expanding U.S. export-control legislation now threatens this critical supply chain.
How critical is Zeiss inside the EUV supply chain?
Zeiss makes the ultra-precision mirrors for ASML's EUV lithography machines — etching chip circuits with extreme-ultraviolet light. Each mirror takes months to manufacture and is irreplaceable.
Zeiss says its components are involved in producing roughly 80% of the world's chips. This means → almost every advanced-node chip passes through Zeiss optics at some stage.
In 2016 ASML invested €1 billion for a minority stake in Zeiss's semiconductor division. In plain terms = ASML locked itself to Zeiss with real money, ensuring the optical supply chain stays intact.
What exactly is Zeiss expanding, and by how much?
Zeiss has retrofitted its Oberkochen headquarters in Germany and is building a new factory at a separate campus, with room for further expansion if needed.
Rohmund calls this "real, long-term capacity expansion" — not a short-term fix. This means → Zeiss is betting on multi-year sustained growth in AI chip demand, not a single-quarter order spike.
The financials back that bet: semiconductor-division revenue hit €5.06 billion in the fiscal year ending September 2025, up 23% year-on-year, making it the largest contributor to Zeiss's roughly €12 billion group revenue.
How far ahead does the Zeiss–ASML partnership look?
Rohmund disclosed that Zeiss and ASML share a joint technology roadmap stretching to around 2040.
This reflects the extremely long iteration cycles of EUV optics — the bond is not merely contractual but architectural.
Rohmund expects "significant growth" this year, driven by investment from hyperscale data-center operators.
Could trade controls hit Zeiss directly?
ASML is already barred from selling its most advanced EUV tools to China under U.S.-led export controls. U.S. lawmakers have proposed new legislation that would extend restrictions to all of ASML's DUV immersion tools and ban servicing equipment at certain sites.
Zeiss also supplies lenses for ASML's DUV machines — older-generation deep-ultraviolet lithography tools still widely used. In plain terms = if the new bill passes, a chunk of Zeiss's DUV lens business gets cut off directly.
Bloomberg reports that Berlin has informally gathered data on Chinese trade flows and supply chains, listing Zeiss as a potential bargaining chip in a possible trade war.
What is the real test for this expansion thesis?
Rohmund himself is cautious about the cycle: "Sooner or later, some kind of correction will probably come."
He added: "We are Germans — we are always cautious, never really excited." This reflects a management team that is not blind to cyclical risk, even mid-expansion.
Whether Zeiss can lock in enough orders before the next downturn arrives is the key test for the entire expansion thesis.
Content is for reference only, not financial advice.