Element Six and Entegris Bet on Synthetic Diamond for GPU Cooling

Element Six and Entegris will co-develop synthetic diamond thermal management for advanced semiconductor packages serving GPU and radio frequency (RF) devices. The collaboration, announced today, targets the packaging layers of graphics processors and RF chips that underpin high-performance computing, data centers, high-speed wireless, artificial intelligence, telecommunications and defense systems.

The deal pairs two distinct capabilities. Element Six, a world leader in synthetic diamond industrial solutions, brings engineered diamond materials. Entegris, a leading supplier of advanced materials and surface engineering for the semiconductor industry, contributes materials science and bonding expertise. The two companies aim to solve one specific problem: attaching diamond to semiconductor wafers and dies without losing heat-transfer performance at the interface.

Why does diamond matter now?

Synthetic diamond has the highest thermal conductivity of any material at room temperature. That property makes it a strong candidate for pulling heat out of chips whose power density keeps rising as AI workloads grow. Conventional cooling technologies are approaching practical limits, and semiconductor manufacturers and hyperscalers now want more compute performance with less energy consumption and less system complexity.

The material has a catch. Its thermal promise only pays off if engineers can bond it to silicon wafers and dies in a way that minimizes thermal boundary resistance — the resistance to heat flow at the junction between two materials. A superb heat conductor joined badly delivers little benefit. The engineering challenge sits at the interface, not in the diamond itself.

What will the partnership actually produce?

The companies plan a broad portfolio of diamond-enabled solutions for semiconductor manufacturers, built around two tracks:

• Engineered surfaces that meet challenging, customized specifications set by chipmakers.
• Bonded diamond technologies covering both polycrystalline and single-crystal diamond platforms.

Offering both platforms gives customers flexibility to pick the approach that fits their device architectures, packaging strategies and performance requirements. The companies say this choice reduces integration complexity and speeds deployment.

Scale and cost sit at the center of the technical agenda. Element Six and Entegris are focused on wafer-level and heterogeneous integration approaches that can reduce manufacturing complexity, cut thermal boundary resistance and meet the performance requirements of next-generation GPU and RF devices. Heterogeneous integration — combining multiple chip types in one package — is where thermal problems concentrate, because packed-together dies leave little room for conventional heat spreading.

What do the executives say?

Siobhán Duffy, CEO at Element Six, framed the deal as a response to an industry-wide constraint. "The semiconductor industry is actively seeking new ways to address thermal constraints as advanced semiconductor architectures continue to push device performance to new levels," she said. "By combining E6's expertise in synthetic diamond materials with Entegris' surface engineering capabilities, we offer the semiconductor community a new tool box of synthetic diamond-based thermal management solutions, enabling new levels of performance and efficiency."

Olivier Blachier, Chief Innovation Officer and President of Materials Solutions at Entegris, stressed that the material alone is not the product. "The opportunity with synthetic diamond is not simply to introduce a material with promising thermal properties, but to engineer the surfaces and bonding approaches that make it suitable for advanced packaging," he said. "Working with Element Six, Entegris is addressing an emerging industry challenge by developing a range of approaches from engineered surfaces to bonded synthetic diamond technologies to support the different requirements of next-generation GPU and RF devices."

What happens next?

The announcement describes a development collaboration, not a shipping product line, and neither company disclosed financial terms, timelines or named customers. Both parties position the work as a way to move diamond from a laboratory curiosity into scalable manufacturing across existing and emerging semiconductor needs.

The commercial logic is straightforward. AI-driven power density has turned heat removal into a limit on how much compute a package can deliver, and diamond — if bonded cheaply at wafer level — offers a path beyond what conventional cooling can reach. Element Six and Entegris will now have to show they can scale the bonding processes at a cost chipmakers accept.