ROHM bolsters GaN power device supply with TSMC technology
ROHM indicates it is reinforcing its gallium nitride (GaN) power device strategy by integrating its in-house development and manufacturing capabilities with TSMC’s GaN process technology. According to the company, the move is designed to establish an end-to-end production system within the ROHM Group and strengthen supply capacity for high-growth markets such as AI servers and electric vehicles (EVs).
For eeNews Europe readers tracking the rapid evolution of wide bandgap semiconductors, this development signals a notable shift in how GaN capacity is being secured and scaled. It also underscores the strategic importance of manufacturing control as demand accelerates in high-voltage and high-frequency applications.
Building an in-group GaN production system
According to the release, ROHM has decided to license TSMC’s GaN process technology and transfer it to ROHM Hamamatsu. The goal is to establish a fully integrated production system by 2027, positioning the company to meet expanding demand in AI server power units and EV on-board chargers.
GaN power devices are valued for their high-voltage and high-frequency performance, enabling improved efficiency and reduced system size. While GaN has already gained traction in consumer products such as AC adapters, adoption is broadening into higher-power domains including AI infrastructure and automotive systems, the company notes. Demand is expected to continue rising as system designers push for greater efficiency and power density.
ROHM indicates that it began early development of GaN devices and launched mass production of 150V GaN at ROHM Hamamatsu in March 2022. In the mid-power segment, the company has relied in part on external collaborations. It has adopted a 650V GaN process since 2023 through its partnership with TSMC, and in December 2024 the two companies entered into a strategic automotive collaboration, further deepening ties.
The newly concluded license agreement represents an evolution of that partnership. Upon completion of the technology transfer, ROHM and TSMC will amicably conclude their automotive GaN partnership, according to the release. However, both companies will continue collaborating to improve the efficiency and compactness of power supply systems.
EcoGaN brand expands market reach
ROHM markets its GaN devices under the EcoGaN brand, positioned as enabling lower power consumption, smaller peripheral components, and simplified designs with fewer parts. According to the company, EcoGaN devices have been adopted in applications such as Innergie’s 45W AC adapter “C4 Duo” in 2023 and power supplies for AI servers from Murata Power Solutions in 2024.
By bringing more of the production flow in-house while leveraging TSMC’s process technology, ROHM is aiming to secure both supply resilience and competitive differentiation in a market increasingly defined by scale and performance.
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