The GlobalFoundries-STMicroelectronics joint venture at Crolles is Europe’s largest semiconductor manufacturing investment in history and the clearest expression of France 2030’s industrial strategy in the semiconductor sector: attracting a world-class US foundry partner to anchor a French technology cluster with European public co-financing, creating a facility that serves both captive demand and external customers in a market where European supply has been structurally insufficient.

Company Background: GlobalFoundries

GlobalFoundries was created in 2009 from AMD’s manufacturing spin-off, subsequently absorbing IBM’s semiconductor manufacturing operations (in 2015) and Singapore’s Chartered Semiconductor. Headquartered in Malta, New York, and publicly listed on NASDAQ in 2021 (ticker: GFS), GlobalFoundries is the world’s third-largest semiconductor foundry by revenue after TSMC and Samsung — with one crucial strategic distinction.

In 2018, GlobalFoundries made the strategically defining decision to exit the leading-edge process technology race at 7nm, focusing exclusively on differentiated specialty technologies at 22nm and above. This decision, initially controversial, has proven commercially rational: the leading-edge race requires investments of $10-20 billion per node generation that only TSMC and Samsung can sustain. GlobalFoundries instead positioned itself as the foundry of choice for applications requiring:

• Mature-node technologies at high reliability (automotive, medical, aerospace qualification standards)
• FD-SOI process flows (GlobalFoundries’ 22FDX platform is a leading FD-SOI offering)
• RF and mmWave chip manufacturing for communications infrastructure
• Embedded non-volatile memory (eFlash, MRAM) integration
• Silicon photonics

This specialty technology focus makes GlobalFoundries a natural partner for France’s FD-SOI strategy — a foundry that understands FD-SOI technology, has qualified it at scale, and serves the external customers that need FD-SOI chip manufacturing.

The Crolles Partnership Structure

GlobalFoundries has operated at Crolles since 2009, when STMicro transferred its foundry business operations to GlobalFoundries as part of the original AMD spin-off structure. The existing relationship between the two companies at Crolles — sharing manufacturing equipment, clean rooms, and process expertise — made the joint expansion the natural vehicle for France’s semiconductor investment.

The expansion structure:

New fab construction: A new 300mm fabrication facility adjacent to STMicro’s existing Crolles fab, sharing infrastructure (utilities, waste treatment, logistics) with the existing site

Technology: FD-SOI process nodes at 18nm (STMicro’s 18FD node) and 28nm — both foundry-qualified for automotive applications, with AEC-Q100 certification pathways

Capacity split: STMicro uses a majority share of new capacity for its own product manufacturing (captive); GlobalFoundries uses its share for external foundry customers

Commercial structure: STMicro and GlobalFoundries each invest equity capital; France 2030 and European Chips Act provide grant support to the joint entity

Technology development: CEA-LETI continues to develop next-generation FD-SOI process nodes in its Grenoble pilot line, with first-priority industrial transfer to the Crolles production fab

This structure creates aligned incentives: STMicro has guaranteed capacity for its own growing demand (automotive, IoT, SiC-adjacent chips); GlobalFoundries has a French manufacturing base to serve European customers who prefer European-made chips; France and the EU have a genuine advanced manufacturing facility employing French workers and using French-developed technology.

Why GlobalFoundries Chose Crolles (Not Elsewhere in Europe)

GlobalFoundries evaluated multiple European locations for its European expansion before committing to Crolles. The selection rationale:

Existing equipment and workforce: GlobalFoundries already operated at Crolles. Expanding an existing site is 30-40% cheaper than greenfield construction for equivalent capacity, factoring in existing clean room infrastructure, trained workforce, qualified suppliers, and established regulatory relationships.

Soitec adjacency: Soitec’s SOI wafer manufacturing facility in Bernin, 3 km from Crolles, provides the substrate supply that FD-SOI manufacturing requires. No other European semiconductor cluster has this combination.

CEA-LETI research pipeline: Continuous access to next-generation FD-SOI process technology developed at CEA-LETI’s Grenoble research facility, with a proven industrial transfer track record spanning three decades.

France 2030 support: €2.9 billion in national grant support (the largest single semiconductor manufacturing grant in European history) made the financial case for Crolles compelling versus alternatives. Without this support, the business case for European expansion over Asian alternatives would have been significantly weaker.

European Chips Act compatibility: The Crolles expansion qualifies as a “First-of-a-Kind” facility under the European Chips Act — enabling EU member state subsidies above normal state aid limits, with European Commission approval.

Market proximity: Proximity to the European automotive industry’s Tier 1 supplier base, located primarily in France, Germany, and Northern Italy. Logistics, customer technical support, and supply chain qualification are all easier with European manufacturing.

The External Foundry Business: GlobalFoundries’ Strategic Contribution

The externally facing foundry business is GlobalFoundries’ most strategically important contribution to the Crolles expansion. STMicro has captive demand for FD-SOI chips (its own product lines); GlobalFoundries must attract external customers — European and global fabless semiconductor companies that design chips but rely on foundries for manufacturing.

Target customer segments for the expanded Crolles foundry capacity:

European automotive semiconductor designers: NXP (Netherlands), Infineon (Germany), Renesas (Japan, with European design centers), Continental (Germany), Valeo (France) all design automotive chips that require automotive-grade foundry manufacturing. Currently, most of this design activity relies on TSMC or Samsung foundry services in Asia — with the supply chain risk that the 2021-2022 shortage made viscerally apparent.

European IoT and industrial chip designers: Europe has a large ecosystem of fabless companies designing industrial control, power management, and IoT application chips. These customers value European manufacturing for supply chain security, proximity, and EU content requirements.

Communications infrastructure: European telecom equipment suppliers (Nokia, Ericsson, and their supply chains) require RF and mixed-signal chips that benefit from FD-SOI’s radiofrequency performance.

Defense and aerospace: European defense electronics companies require chips manufactured in trusted, domestically controlled facilities — a criterion that Asian foundries fail by definition.

GlobalFoundries’ foundry sales team is targeting design win commitments from European customers for the expanded Crolles capacity in the 2024-2027 window, when chip designers make process selection decisions for products entering production in 2028 and beyond.

Technical Capabilities at Expanded Crolles

The expanded Crolles fab will operate:

22FDX (22nm FD-SOI): GlobalFoundries’ flagship FD-SOI process, offering best-in-class power efficiency for IoT, wearable, and 5G mmWave applications. The 22FDX node has a back-bias capability that allows dynamic trade-off between performance and power consumption — a unique capability not available in FinFET processes.

18FD (STMicro’s 18nm FD-SOI): STMicro’s next-generation FD-SOI node, developed jointly with CEA-LETI, offering improved density and performance compared to 28nm while preserving FD-SOI’s power efficiency advantages. Automotive qualification (AEC-Q100 Grade 0 for highest temperature range) is a target specification.

28nm FD-SOI: Mature, automotive-qualified node with extensive IP ecosystem. Entry-level FD-SOI for cost-sensitive applications.

300mm wafer production: All processes run on 300mm wafers — the same wafer size as TSMC and Samsung’s advanced fabs. This is a significant advantage over some European semiconductor competitors still operating on 200mm wafers.

Investment Mechanics: France 2030 and European Chips Act

The public support for the Crolles expansion involves a multi-layer funding architecture:

France 2030 national grant: €2.9 billion, administered through SGPI (Secrétariat Général pour l’Investissement). This grant was awarded through an exceptional project process — bypassing standard competitive calls because the investment scale and strategic urgency warranted direct negotiation.

European Chips Act First-of-Kind facility designation: The European Commission approved the Crolles expansion as a First-of-Kind facility under the Chips Act’s Article 24 mechanism, allowing France to grant subsidies above normal Article 107 TFEU state aid limits. The EU co-funding contribution is approximately €600 million.

Auvergne-Rhône-Alpes regional support: The regional government contributes approximately €100 million in grant and infrastructure support, primarily covering road access improvements, utilities upgrades, and workforce training center expansion.

Total public support: ~€3.5-3.6 billion for a €7.45 billion total investment, representing a 47% public subsidy rate.

Private capital: STMicro and GlobalFoundries each fund their proportional share of the remaining €3.85 billion through company capital expenditure budgets and project financing.

Construction Timeline and Milestones

• 2022: Joint venture announced; regulatory and state aid approvals begin
• 2023: Construction starts; European Commission state aid approval obtained
• 2024: Civil works complete; equipment installation begins (clean room buildout)
• 2025-2026: First equipment qualified; initial wafer production begins
• 2027: First production volumes available for customer orders
• 2028-2029: Ramp to full capacity (620,000 wafer starts/month combined with existing fab)

The timeline is aggressive by global semiconductor fab construction standards — but achievable given the brownfield expansion nature of the project. TSMC’s Arizona greenfield fab, by comparison, has experienced significant delays due to workforce and supply chain challenges that brownfield expansions avoid.

Geopolitical Significance

The GlobalFoundries Crolles investment has geopolitical dimensions beyond its commercial logic:

US-Europe semiconductor alliance: GlobalFoundries is a US-headquartered company with significant US government relationships (receiving CHIPS Act funding for its US fabs). Its investment in France, supported by European public funds, demonstrates a US-EU alignment on semiconductor supply chain resilience — both want to reduce dependence on East Asian manufacturing.

European supply chain security: A major FD-SOI foundry operating in France with European ownership (STMicro is European; GlobalFoundries has significant European operations) reduces European automotive manufacturers’ dependence on TSMC for mature-node chips.

Export control buffer: As US-China semiconductor trade tensions intensify, having European manufacturing capacity for chips serving European markets reduces exposure to export control disruptions affecting Asian supply chains.

Strategic Assessment

The GlobalFoundries Crolles expansion is commercially sound and strategically well-positioned. The partnership structure creates genuine incentive alignment; the technology focus is defensible; the public support is substantial but proportionate to the strategic value.

The critical uncertainty remains external foundry customer acquisition. The facility needs European fabless chip companies to commit design wins to Crolles FD-SOI process flows — these decisions are being made in 2024-2027 for chips entering production 2028-2030. If European automotive and industrial chip designers commit to Crolles rather than defaulting to TSMC, the commercial case closes. If they choose TSMC inertia, the GlobalFoundries foundry volumes may fall short of projections.

The Crolles expansion is France’s largest and most visible semiconductor bet. Its success will define France 2030’s semiconductor legacy.

Related Content

• Semiconductors Sector Hub — Full sector overview
• STMicroelectronics — Co-investment partner
• Crolles-Grenoble Cluster — Ecosystem context
• European Chips Act France — EU funding framework
• France Chips Strategy — Strategic rationale
• Soitec — SOI substrate supply