The GCSA produced principles, not production targets. The Advanced Materials Act decides whether European fabs get domestic substrates.
The European Union's Group of Chief Scientific Advisors delivered its Scientific Opinion No. 18 on advanced materials to Commissioner Iliana Zaharieva on April 21, 2026, completing a formal handover process that began with a Commission tasking to the SAM in March 2025. The recommendations, published alongside the SAPEA Evidence Review Report, organize around four areas: safety and sustainability standards, circular economy and material substitution, digitalisation and FAIR data practices, and standards as competitive enablers. What the documents do not contain are production targets for the advanced packaging substrates, glass substrates, and silicon carbide wafers that European semiconductor fabs currently source from Taiwan, Japan, and South Korea.
Anke Weidenkaff, co-chair of the SAPEA working group that prepared the evidence review, named the structural problem at the handover: "Europe's fragmented cross-border economic ecosystems weaken its ability to compete with concentrated advanced materials manufacturing hubs elsewhere," according to ALLEA, the European Federation of Academies of Sciences and Humanities. The question now moves to the Advanced Materials Act, expected as a legislative proposal later in 2026. The Act will either translate the GCSA's principles into specific domestic substrate manufacturing targets with capital allocations, or produce another framework document while European fabs continue operating on East Asian supply chains.
Weidenkaff is managing director of the Fraunhofer Research Institution for Materials Recycling and Resource Strategies (IWKS) and professor of materials engineering and resource management at the Technical University of Darmstadt. She co-chairs the SAPEA working group on advanced materials with Olli Ikkala. The working group compiled the scientific evidence feeding the GCSA recommendations. A working group co-chair naming structural fragmentation as Europe's competitive disadvantage at the handover ceremony locates the critique inside the advisory process itself, not as external commentary on the output.
The GCSA Scientific Opinion addresses advanced materials as a category spanning semiconductors, energy storage, structural composites, and biomedical applications. For semiconductor-relevant materials, the recommendations focus on research directions rather than production mandates. The SAPEA evidence review identifies recyclable and biodegradable materials for substrates and packaging, and alternatives to high-purity silicon, as research directions. The GCSA recommendations do not translate these directions into production timelines.
The recommendations do not name ABF substrate production targets, glass substrate manufacturing milestones, process node qualification schedules for European silicon carbide or gallium nitride programs, or fab-certified yield data requirements. The documents position advanced materials policy as an enabler of circular economy principles and digital competitiveness, not as a production-scale supply chain intervention. The European Commission's public consultation on the Advanced Materials Act, which closed January 13, 2026, described the Act as aiming to "establish a strategic framework for advanced materials" and "enhance production capacity of advanced materials in the EU." Whether the legislative proposal moves from framework to production targets is the decision point.
The Advanced Materials Act's procedural path from consultation to proposal is open-ended. Targeted stakeholder consultations are ongoing. The Commission has not announced a date for the legislative proposal beyond "in 2026." The Chips Act review, due September 2026 under the Regulation's evaluation mechanism, will run in parallel with Advanced Materials Act preparation. No formal industry engagement mechanism between consultation close and the proposal launch has been published.
The advanced materials policy sits on top of the European Chips Act framework, which according to the European Commission has catalyzed more than €80 billion in investments in chip manufacturing capacity. SEMI Europe's independent tracking, published in November 2025, recorded €69 billion across research and development projects and facility investments as of that date. The Commission's target is to double the EU's global semiconductor market share from 10% to 20% by 2030.
The European Court of Auditors put the gap between Chips Act investment and market share movement on a primary-source footing. In Special Report 12/2025, published April 28, 2025, the ECA found that despite reasonable progress in implementation, the Chips Act is very unlikely to be sufficient to reach the 20% by 2030 Digital Decade target. The Commission's own July 2024 forecast projects EU global market share rising from 9.8% in 2022 to 11.7% by 2030, well below the 20% target. ECA member Annemie Turtelboom called for a "reality check." The Council of the European Union adopted formal Conclusions on the report on June 20, 2025, asking the Commission to align national, European, and private funding streams and to address industrial demand for foundational microchips alongside cutting-edge production. The gap creates a difficult baseline for the advanced materials policy: if €80 billion in catalyzed Chips Act investment is on track to lift market share by less than two percentage points by 2030, what level of capital commitment would be required to establish domestic substrate manufacturing at volume?
Materials-specific initiatives exist but remain at construction or predecessor pilot scale. The European Commission approved Italy's €2 billion state aid package for STMicroelectronics' new silicon carbide facility in Catania, Sicily, in May 2024 (case SA.107594), against a total project investment of approximately €5 billion. The Catania Campus, manufacturing on 200mm SiC wafers, is positioned as the first integrated SiC manufacturing facility in Europe, covering all production steps from powder material through finished modules. Production is targeted for 2026, with full capacity by 2033 reaching up to 15,000 wafers per week. STMicroelectronics has not published production node qualification data or fab-certified yield figures. Among EU-funded graphene-related pilot programs, the Graphene Flagship's 2D Experimental Pilot Line (2D-EPL) closed September 30, 2024, and the SME Instrument Phase 2-funded G4SEMI project closed April 30, 2020. The active successor, the 2D Pilot Line (2D-PL), is funded under Horizon Europe and offers multi-project wafer prototyping services for 2D-material integration into silicon platforms.
Taiwan, Japan, and South Korea publish substrate manufacturing milestones with process node qualifications, customer certifications, and yield data. European pilot programs have not. The difference is not research capability (European institutions produce advanced materials research at the frontier) but the chain from pilot line to fab-qualified supply. That chain requires capital at scale, process integration with specific foundry architectures, and customer commitment pathways that allow substrate manufacturers to finance the transition from demonstration to volume production.
The GCSA recommendations do not address this chain. The principles-based framework (emphasizing safety, sustainability, circular economy, and standards harmonization) positions advanced materials policy as a values-driven intervention rather than a production-scale supply chain build. Industry timelines for initial European substrate manufacturing point to the early 2030s through flagship joint ventures or publicly backed projects, conditional on whether capital, technical expertise, and supply chain integration materialize at fab scale.
The Chips Act review is due in September 2026 under the Regulation's evaluation mechanism. In September 2025, the Semicon Coalition, composed of all 27 EU Member States, signed a declaration calling for a Chips Act 2.0 to address industrial demand for foundational microchips alongside cutting-edge production.
The Advanced Materials Act runs in parallel with the Chips Act 2.0 effort. The Commission's stated path is a legislative proposal in 2026, followed by ordinary legislative procedure through Council and Parliament. Member State positions on industrial policy spend remain the unresolved variable. Whether the two tracks produce coordinated production targets with funding alignment, or compete for the same industrial-policy budget headroom, will be decided in the legislative round that opens after September 2026.
Two flagship programs illustrate the dependency the GCSA recommendations do not address. The European Semiconductor Manufacturing Company (ESMC), the joint venture breaking ground in Dresden in August 2024 with €5 billion in EC-approved state aid against a planned €10 billion total investment, is 70 percent owned by TSMC, with Bosch, Infineon, and NXP each holding 10 percent. The fab will produce 28/22-nanometer CMOS and 16/12-nanometer FinFET wafers on TSMC process technology, with production targeted for late 2027. SiPearl's Rhea1 processor, the General-Purpose Processor developed under the European Processor Initiative for the EuroHPC JUPITER exascale system, taped out at TSMC in June 2025. Europe's flagship Chips Act fab and the sovereign processor for its first exascale supercomputer both route through Taiwan's foundry capacity. The advanced packaging substrates that bind those wafers (ABF for advanced logic, glass for emerging chiplet stacks) are dominated by East Asian manufacturers including Unimicron, Ibiden, Nan Ya, Shinko, and Kinsus.
For systems architects and HPC engineers, substrate sourcing is not a direct procurement decision. Fabs make those decisions. The practitioner consequence is indirect but structural: if European advanced materials policy fails to produce domestic substrate supply at volume, supply chain constraints will limit available foundry options for custom AI accelerators and HPC processors built in Europe. The sovereignty thesis depends on the ability to manufacture domestically at competitive cost and technology node. Advanced packaging substrates and glass substrates are enabling technologies for chiplet architectures and high-bandwidth memory integration; silicon carbide and gallium nitride enable power electronics for data center infrastructure. If European fabs cannot source these materials domestically, the Chips Act's production capacity targets operate on supply chains controlled by the same East Asian concentration the policy aims to reduce dependency on.
The SAPEA co-chair's statement at the handover names this as a structural competitive disadvantage: fragmented cross-border ecosystems competing against concentrated manufacturing hubs. The GCSA recommendations do not propose a concentration mechanism. The Advanced Materials Act is the legislative vehicle for translating principles into obligations. If the Act names specific production targets with capital allocations and customer commitment pathways, it begins closing the gap between policy ambition and manufacturing reality. If it produces a strategic framework without production specifics, European fabs will continue sourcing advanced packaging materials from Taiwan, Japan, and South Korea through the remainder of the decade.
The Chips Act review, scheduled for September 2026, will report whether €80 billion in catalyzed investment has moved Europe's semiconductor market share above 10%. If the review finds the share unchanged, the advanced materials policy is being built on top of a base case where the foundational Chips Act has already missed its primary objective on its own timeline. The GCSA handover formalizes scientific advice; the Advanced Materials Act determines whether that advice produces substrate manufacturing capacity or remains a principles document.
The Advanced Materials Act legislative proposal, expected in 2026, will either name specific domestic substrate manufacturing targets with capital allocations or repeat the principles-based framework of the GCSA recommendations. The European Commission has not announced a specific date for the proposal. The difference between a production-target Act and a principles-framework Act determines whether European semiconductor sovereignty policy has a substrate supply roadmap or continues operating on intent. If the Act names fab-qualified ABF or glass substrate supply by specific dates, silicon carbide and gallium nitride volume manufacturing milestones, and customer certification pathways, it translates the GCSA's principles into binding production obligations. If it establishes a strategic framework for advanced materials without production specifics, the gap between policy and manufacturing capacity remains open through 2030.
If STMicroelectronics' silicon carbide facility in Catania and the 2D Pilot Line (2D-PL) do not report production node qualification or fab-certified yield data by mid-2027, they remain construction-stage and prototyping programs without volume manufacturing relevance. Taiwan, Japan, and South Korea publish qualification milestones: named process nodes, yield thresholds, customer certifications. European programs have not. Fifteen months from the April 2026 handover is sufficient time for a production-bound program to demonstrate qualification progress. The STMicroelectronics Catania facility has a €2 billion state aid commitment. Absence of qualification data by June 30, 2027 signals continued research and development phase rather than transition to volume manufacturing.
If Europe's semiconductor market share remains at or below 10% in the September 2026 Chips Act review, the advanced materials policy is being built on top of a base case where the Chips Act's primary objective has already failed on its own timeline. The Chips Act targets 20% global market share by 2030. As of April 2026, the share remains approximately 10% despite €80 billion in catalyzed investment. The advanced materials policy is positioned as supporting semiconductor sovereignty, but if the foundational Chips Act has not moved the market share needle, the materials policy faces the same structural headwind. The September 2026 review will either validate or further undermine the premise that EU policy can reshape global semiconductor manufacturing geography.
The GCSA produced principles, not policy. The Scientific Opinion organizes around safety, sustainability, circular economy, FAIR data, and standards. It does not name the substrates European fabs need or the production milestones required to supply them domestically. That is what was delivered. The Advanced Materials Act, expected as a legislative proposal in 2026, is the unresolved question. If the Act translates principles into specific substrate manufacturing targets with capital commitments and customer pathways, it begins building the supply chain foundation for European semiconductor sovereignty. If it produces another framework document, European fabs will continue sourcing advanced packaging materials from East Asia while the EU publishes policy on strategic autonomy.
