Polar Semiconductor and imec target 8-inch GaN production for AI data centers and US power chips

Polar Semiconductor, LLC and Belgium-based semiconductor research organisation imec have announced a collaboration to establish 8-inch gallium nitride (GaN) device manufacturing capabilities at Polar’s Bloomington, Minnesota, foundry, extending the American chipmaker’s push into advanced power semiconductor technologies. The agreement, announced on October 12, 2026, provides for the transfer of imec’s GaN-on-silicon process, device and epitaxy technology to support production of enhancement-mode GaN devices initially covering voltage ratings from 40V to 650V. IC-Link by imec will connect semiconductor customers with the technology through design, prototyping and manufacturing services, creating a potential pathway from product development to commercial-scale wafer fabrication. The arrangement targets growing demand for efficient power conversion in artificial intelligence data centers, automotive electronics, industrial infrastructure and aerospace and defense systems. Its commercial significance will depend on successful manufacturing qualification, competitive production economics and the ability to convert customer development programmes into repeatable orders.

The collaboration brings together Polar Semiconductor’s established 200mm wafer fabrication infrastructure and imec’s research-developed GaN technology, creating a route to domestic production of specialised power devices without requiring customers to establish their own wafer factories. It also builds on Polar’s expanding manufacturing programme, supported by a US semiconductor investment exceeding $525 million and federal incentives awarded under the CHIPS and Science Act. Unlike conventional processor manufacturing, where investment attention often concentrates on advanced logic nodes, power semiconductors address the increasingly consequential challenge of converting, controlling and distributing electricity efficiently. That challenge has gained urgency as AI computing systems demand higher power density, while automotive and industrial equipment manufacturers pursue better energy efficiency and more resilient semiconductor supply chains.

How will the imec technology transfer change Polar Semiconductor’s 8-inch GaN manufacturing capabilities?

The agreement covers imec’s GaN-on-silicon process, device technology and epitaxial manufacturing expertise, with Polar Semiconductor taking responsibility for fabrication at its Minnesota facility. The initial technology range spans 40V to 650V, encompassing several power conversion applications rather than a single specialised semiconductor product. Both companies have identified potential future expansion toward lower and higher voltages, although they have not announced a timetable or defined the specifications of those additional processes. The agreement also does not disclose licensing fees, minimum purchase commitments or a confirmed date for full-scale manufacturing.

The emphasis on enhancement-mode GaN is significant because these transistors are normally off when no suitable gate voltage is applied, making them attractive for power electronics systems that require predictable switching behaviour. Gallium nitride offers physical characteristics that can enable faster switching, reduced conversion losses and compact power system designs compared with conventional silicon devices in suitable applications. However, successful adoption depends on more than the semiconductor material itself, since gate-drive design, packaging, thermal management and system reliability influence the performance of completed products. Customers will therefore evaluate devices manufactured by Polar against established alternatives using application-specific performance and cost requirements.

Imec’s involvement provides a substantial technical foundation. The Belgian research organisation demonstrated normally-off 200V and 650V GaN-on-silicon devices on 200mm wafers in 2017, following research into device structures, wafer stress management and dynamic on-resistance behaviour. More recent work has extended its enhancement-mode platform across voltage ratings from 40V to 650V, supporting the technology range identified in the Polar agreement. The transfer of a research-developed process to a commercial foundry still requires production-line adaptation, process qualification and customer-specific validation before meaningful volume manufacturing can be established.

IC-Link’s participation addresses the customer-access side of this process. Rather than providing only a fabrication service after a design has been completed, IC-Link offers support across technology selection, engineering, prototyping, manufacturing coordination and related supply-chain activities. Customers could potentially evaluate devices using imec’s technology before committing to production at Polar, reducing the need to build separate relationships for research access and manufacturing execution. This integrated approach may be particularly attractive to specialist semiconductor designers that have product expertise but limited manufacturing infrastructure.

Why does 200mm gallium nitride manufacturing matter for semiconductor production costs?

The decision to manufacture on 8-inch, or approximately 200mm, wafers reflects an effort to combine compound semiconductor performance with the economic advantages of established silicon fabrication infrastructure. Compared with a 150mm wafer, a 200mm wafer has approximately 78% more surface area, creating the potential to produce more devices during each processing cycle. The actual cost advantage depends on usable die counts, equipment throughput, defect rates and the complexity of each manufacturing process. Larger wafer dimensions alone do not guarantee lower semiconductor production costs.

GaN-on-silicon introduces additional manufacturing considerations because gallium nitride and silicon have different thermal expansion characteristics and crystal structures. Producing reliable epitaxial layers requires careful control of stress, defects and wafer deformation, particularly as the diameter increases. Imec’s previous research has addressed several of these engineering challenges through specialised buffer layers, device architecture and substrate optimisation. Transferring this expertise into Polar’s commercial production environment could shorten development work, although achievable yields and manufacturing costs remain to be demonstrated.

Polar already operates a 200mm facility supporting technologies including bipolar-CMOS-DMOS, MOSFET, insulated-gate bipolar transistor and sensor processes. Its established manufacturing infrastructure provides a foundation for process control, wafer handling, testing and quality management. Nevertheless, adding GaN-on-silicon technology involves specialised materials and manufacturing requirements, so the availability of conventional silicon processing equipment does not eliminate the need for additional validation. Commercial performance will depend on whether the licensed process can deliver consistent device characteristics at yields that make the products competitive.

Can Polar Semiconductor’s GaN partnership support next-generation 800V AI data center power systems?

Artificial intelligence infrastructure represents one of the more commercially attractive potential markets for high-performance power semiconductors because power delivery has become increasingly important to the economics of accelerated computing. NVIDIA Corporation and its industry partners are developing 800V direct-current distribution architectures intended to support higher-density AI computing installations. These architectures seek to reduce current requirements, electrical distribution losses and the physical space occupied by power infrastructure. They also increase demand for efficient conversion between high-voltage distribution systems and the much lower voltages required by computing hardware.

Polar Semiconductor and imec specifically identified 800V-to-12V conversion as a potential application for their developing GaN capabilities. Such systems can involve multiple semiconductor devices, conversion stages and circuit configurations, with device voltage ratings selected according to the electrical stresses encountered within each topology. The initial 650V upper rating of the licensed technology should therefore not be confused with certification for direct use across an entire 800V electrical bus. Actual suitability will depend on the completed converter architecture, protection requirements and operating conditions.

Industry activity already demonstrates that this opportunity is attracting substantial engineering investment. Infineon Technologies AG introduced GaN-based reference designs in March 2026 targeting 800V data center power conversion, including configurations supporting 800V-to-50V and 800V-to-12V conversion. Its systems use combinations of high-voltage and lower-voltage semiconductor devices to achieve the required electrical performance, illustrating the importance of developing a portfolio rather than focusing on a single voltage rating. STMicroelectronics N.V. has also expanded its power conversion offerings for 800V AI data center infrastructure, reinforcing the competitive momentum behind these emerging architectures.

For Polar, the opportunity would be to manufacture GaN devices used by companies developing power conversion products, rather than necessarily supplying complete power systems directly to hyperscale data center operators. Its foundry business could benefit from demand originating with semiconductor designers, power module suppliers and equipment manufacturers that require qualified wafer production. Revenue opportunities would depend on customer adoption, wafer pricing, production volume and contractual arrangements that have not been disclosed. The collaboration does not establish a supply agreement with NVIDIA or any specific hyperscale computing customer.

How does the imec agreement fit Polar Semiconductor’s wider GaN and power chip strategy?

The October agreement is part of a broader effort by Polar Semiconductor to build a diversified domestic foundry business through technology licensing and partnerships. In April 2025, the company signed an agreement with Renesas Electronics Corporation to license depletion-mode GaN-on-silicon technology and support fabrication of 650V-class devices on 200mm wafers. That arrangement positioned Polar to serve Renesas and other customers requiring high-voltage power semiconductor manufacturing in the United States. The imec partnership adds an enhancement-mode technology route to the existing GaN development strategy.

These two GaN technologies use different operating approaches, creating potential diversity in the company’s manufacturing offering. Depletion-mode transistors are normally on at zero gate bias, while enhancement-mode devices are normally off, influencing their circuit implementation and suitability for particular applications. Depletion-mode GaN can also be combined with a silicon transistor to create normally-off power switching solutions. Maintaining access to both approaches could allow Polar to address a broader range of customer designs without assuming that one architecture will dominate every power conversion market.

Polar has simultaneously expanded relationships beyond GaN. In May 2026, the company announced a manufacturing collaboration with Nexperia B.V. covering next-generation power MOSFET devices for markets including AI servers, robotics, industrial equipment and automotive electronics. A December 2025 memorandum of understanding with United Microelectronics Corporation also established a framework for exploring additional 8-inch semiconductor manufacturing opportunities in the United States. Alongside earlier technology licensing with Tower Semiconductor Ltd., these arrangements show how Polar is using external intellectual property and commercial relationships to broaden its foundry capabilities.

The partnerships have different structures and should not be interpreted as equivalent revenue commitments. The Renesas agreement concerns licensed GaN technology and manufacturing, the imec collaboration adds another licensed process and customer-access channel, while the United Microelectronics Corporation arrangement was announced as an exploratory memorandum of understanding. The Nexperia collaboration targets a different power transistor category with established commercial applications. Together, they strengthen the potential customer and technology portfolio, but their eventual financial contribution will depend on separate qualification programmes and production agreements.

What does Polar Semiconductor’s $525 million expansion mean for US chipmaking capacity?

The collaboration is taking place during a major capacity and modernisation programme at Polar’s Bloomington manufacturing site. The United States Department of Commerce awarded the company up to $123 million in direct funding under the CHIPS and Science Act, supporting a wider investment programme valued at more than $525 million. The project involves private, state and federal funding intended to expand production, modernise equipment and strengthen the domestic supply of power and sensor semiconductors. The federal figure represents the awarded funding ceiling rather than proof that the entire amount has already been disbursed.

Polar’s current manufacturing information describes capacity of approximately 21,000 wafers per month for a mixed integrated-circuit and discrete-device production configuration. With full deployment of its expansion targeted for 2027, the company expects monthly capacity to increase to 40,000 wafers under a mixed production configuration, or as much as 70,000 wafers under a discrete-device-only configuration. These are alternative operating configurations rather than additive capacity figures. The projected increase would give the foundry greater manufacturing flexibility, although the October announcement does not allocate a specific portion of future capacity to imec’s GaN technology.

The expansion also includes automation, wafer tracking and manufacturing control upgrades intended to improve operating efficiency and process consistency. These investments are relevant to GaN because production quality depends on tight control of process conditions, material characteristics and defect levels. Higher throughput could improve fixed-cost absorption if customer orders support sufficient factory utilisation, but unused capacity would place pressure on manufacturing economics. Polar’s eventual competitive position will therefore depend on matching its expanded manufacturing capabilities with sustained demand rather than relying on capacity announcements alone.

Domestic production has an additional strategic dimension for aerospace, defense and other customers seeking tighter control over critical semiconductor supply chains. Polar achieved AS9100D and ISO 9001:2015 certification for semiconductor wafer manufacturing in March 2026, complementing its existing automotive quality credentials. These certifications strengthen its ability to pursue high-reliability markets, although individual GaN products may still require further customer and application-specific qualification. The company’s continuing work on defense-related compliance and trusted manufacturing capabilities could broaden its addressable markets as those programmes develop.

What commercial challenges must Polar and IC-Link overcome before GaN production scales?

The immediate challenge is converting an established technology platform into a qualified, repeatable manufacturing process at a different fabrication site. Successful technology transfer requires controlling epitaxial material quality, electrical characteristics, device reliability and process variability while meeting customer specifications. GaN devices must also undergo testing appropriate to their intended applications, with automotive, industrial and defense customers often imposing lengthy qualification procedures. Production-readiness announcements are therefore most meaningful when accompanied by evidence of qualified devices, stable yields and committed customer demand.

Competition will also affect the economics of the arrangement. Infineon Technologies, Renesas Electronics, STMicroelectronics and other power semiconductor suppliers are investing in GaN and related wide-bandgap technologies, while specialised semiconductor companies are advancing competing device designs and manufacturing approaches. Some competitors have established customer relationships, packaged products and system-level reference designs that may help accelerate market adoption. Polar’s opportunity is to participate as a manufacturing partner within this ecosystem, offering domestic production and access to specialised processes rather than competing solely through proprietary finished products.

Pricing and utilisation will determine whether the collaboration generates attractive foundry economics. A technically successful GaN process may still face commercial pressure if customers achieve better total system costs through silicon MOSFETs, silicon carbide devices or alternative GaN manufacturing platforms. Packaging, reliability, power density and thermal performance must also be considered alongside the wafer fabrication cost. Polar has not disclosed financial targets for the imec partnership, making it premature to estimate revenue, margins or payback associated with the specific technology transfer.

For imec and IC-Link, the opportunity is to move an established research platform into a commercial manufacturing environment capable of supporting broader customer adoption. For Polar Semiconductor, success would expand its role in advanced power semiconductors while strengthening the strategic relevance of its Minnesota factory. The most meaningful next milestones will be completion of the technology transfer, qualification of initial enhancement-mode GaN devices and evidence of customer programmes progressing from prototyping into volume orders. Those developments would demonstrate whether the partnership is creating a durable manufacturing business rather than simply adding another process technology to Polar’s portfolio.

What are the key takeaways from Polar Semiconductor’s 8-inch GaN manufacturing partnership?

• Polar Semiconductor and IC-Link by imec announced an agreement on October 12, 2026, to support US production of enhancement-mode GaN devices.
• The licensed technology initially covers voltage ratings from 40V to 650V on 200mm silicon wafers.
• AI data centers, automotive electronics, industrial power systems and aerospace and defense are target markets.
• IC-Link will support customer access, prototyping and the transition toward commercial manufacturing.
• The agreement complements Polar’s existing depletion-mode GaN technology partnership with Renesas Electronics Corporation.
• Polar’s wider Minnesota expansion represents more than $525 million in planned investment, supported by federal, state and private funding.
• The foundry targets capacity of 40,000 mixed-product wafers per month by 2027, subject to completion of the expansion.
• Competition in GaN power semiconductors is intensifying as manufacturers develop solutions for 800V AI computing infrastructure.
• Commercial success will depend on production qualification, manufacturing yields, customer adoption and sustainable foundry economics.