Resonac Holdings Corporation, a major Japanese chemical and semiconductor materials company, has successfully replicated and verified AI semiconductor implementation using a chip that generates an extremely high heat output of 1,000W. This achievement is part of the company’s broader strategy to solve critical thermal management challenges in the era of high-output generative AI.

Breaking Thermal Barriers in AI Semiconductors

The Japanese materials giant Resonac has conducted a verification of heat dissipation performance by simulating a 1,000W thermal load, a level expected in next-generation AI semiconductors. As AI workloads grow, the Thermal Design Power (TDP) of chips is rising rapidly, pushing traditional cooling methods to their physical limits. This validation was performed at the company’s Packaging Solution Center (PSC) in Japan, utilizing a full lineup of manufacturing equipment to mimic actual production environments. The experiment focused specifically on how Thermal Interface Materials (TIM)—placed between the chip and the heat sink—could efficiently handle extreme heat loads. Establishing these implementation technologies for high-output chips is a vital step for enhancing the reliability of Japanese and global AI server infrastructures.

The Critical Role of 2.5D and 3D Packaging Technology

The evolution of semiconductor technology is shifting toward 2.5D and 3D packaging, which integrates multiple chips with high density. In 2.5D technology, chiplets are placed side-by-side on an interposer, while 3D architecture involves stacking them vertically to achieve high-speed processing. While these methods provide massive bandwidth, they create a serious side effect: heat concentration in a very limited surface area. Resonac is developing optimal material configurations to dissipate heat both vertically and horizontally within these complex chiplet designs. This recent 1,000W validation serves as proof of the effectiveness of the company’s total solution approach, moving beyond individual material evaluation to comprehensive package structural design.

Why Managing 1,000W of Heat is a Significant Challenge

A 1,000W power draw is several times higher than that of conventional high-end CPUs, creating intense thermal hotspots within the chip. In 3D-stacked chips, the thinness of the dies limits horizontal heat spreading, and the layers of adhesives and die-bonding materials often act as insulators, blocking vertical dissipation. This leads to increased leakage current and stress on interconnects, risking performance degradation and reliability failure. Furthermore, heat issues are closely linked to voltage drops and dynamic noise in Through-Silicon Vias (TSVs), which can destabilize the entire system. Resonac’s verification in Japan aims to provide realistic, material-based solutions to these intertwined challenges of power and heat.

Innovative Vertically Aligned Graphite TIM

The centerpiece of Resonac’s solution to these thermal bottlenecks is its proprietary Thermal Interface Material (TIM). This Japanese-developed TIM incorporates graphite particles into a flexible sheet using a unique manufacturing process that aligns the particles vertically relative to the sheet surface. This vertical alignment allows heat to be transported rapidly from the chip directly to the cooling device or heat sink. To meet surging global demand for AI semiconductors, Resonac has decided to invest approximately 15 billion yen to expand its TIM and NCF (Non-Conductive Film) production capacity in Japan by 3.5 to 5 times. This technology is designed to withstand the rapid temperature fluctuations characteristic of AI workloads while maintaining flexibility and reliability.

JOINT3: Driving Open Innovation in the Supply Chain

Resonac is not only developing materials but is also leading a consortium called “JOINT3” to bolster the competitiveness of the entire semiconductor industry. Launched in September 2025, this enterprise alliance brings together 27 world-class companies specializing in materials, manufacturing equipment, and design. A primary driver for this initiative is the capacity bottleneck found in existing supply chains, such as those led by TSMC in Taiwan. By sharing equipment and evaluation technologies among members, the consortium aims to accelerate the development of advanced packaging. High-level experiments like the 1,000W thermal validation provide practical data that is fed back to these partner companies, helping Japanese firms secure a position of “absolute advantage” in the global AI supply chain.

Future Outlook for the Thermal Management Market

The market for thermal management in advanced packaging is projected to reach approximately \$500 million by 2036. Technological trends are moving toward “TIM1.5,” which reduces thermal resistance by minimizing material interfaces, and next-generation solutions like microfluidic cooling, where coolant circulates directly within the package. Resonac is preparing for these shifts by expanding its portfolio of TIMs and Non-Conductive Films (NCF). The company’s sales of NCF, essential for stacking High Bandwidth Memory (HBM), grew threefold in 2024 and are targeted to double again in 2025. Leveraging a technology portfolio built over 20 years, the Japanese firm is positioned to remain a cornerstone of AI semiconductor evolution.

Reference Pages

• 【AI半導体向け材料の生産能力を拡大 | News Releases – Resonac】https://www.resonac.com/jp/news/2024/03/29/3000.html

• 【2.5D／3D半導体パッケージングの熱対策戦略 | IDTechEx Research Article】https://www.idtechex.com/ja/research-article/thermal-strategies-for-2-5d-and-3d-semiconductor-packaging/33510

【#Semiconductors #Resonac #AIChips #ThermalManagement #AdvancedPackaging #Technology #Japan】