Coherent Introduces High-Performance Liquid Cold Plates for AI Accelerators

New Thermadite 800 material offers superior thermal conductivity and stability for next-gen compute cooling.

Published on Mar. 5, 2026

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Coherent Corp., a global leader in photonics, has announced the launch of its Thermadite 800 Liquid Cold Plates (LCPs) designed for cooling high-power AI accelerators. The new material offers thermal conductivity twice that of copper, enabling more efficient heat removal and reduced cooling system costs for modern AI chips.

Why it matters

As AI and high-performance computing workloads continue to grow, effective chip cooling is critical to maintaining performance and reliability. Coherent's Thermadite 800 LCPs provide an advanced thermal management solution to address the extreme heat flux challenges of the latest AI accelerators.

The details

Thermadite 800 LCPs leverage a proprietary material that integrates diamond into a silicon carbide matrix, delivering superior thermal conductivity of 800W/(m⋅K) - roughly double that of copper. This allows the cold plates to reduce chip temperatures by over 15°C compared to conventional copper designs. The material also offers 60% lower density than copper, enabling high-performance cooling in mass-sensitive systems.

  • Coherent announced the launch of Thermadite 800 LCPs on March 5, 2026.

The players

Coherent Corp.

A global leader in photonics that develops advanced materials and solutions for high-performance computing and other industries.

Steve Rummel

Senior VP of the Engineered Materials Group at Coherent.

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What they’re saying

“Effective cooling in high-performance computing depends on the entire thermal route from chip to coolant. By merging decades of material science with precision manufacturing, Thermadite liquid cold plates lower chip temperatures, optimize pressure flow, and minimize interface resistance - all specifically designed for the extreme requirements of modern AI chips.”

— Steve Rummel, Senior VP of the Engineered Materials Group (Coherent)

What’s next

Coherent plans to feature examples of Thermadite 800 LCPs at the SEMI-THERM Symposium & Exposition 2026 and the Optical Fiber Communication Conference and Exhibition (OFC) 2026.

The takeaway

Coherent's new Thermadite 800 liquid cold plates represent a significant advancement in thermal management technology for high-performance AI accelerators, enabling more efficient cooling and reduced operating costs through superior thermal conductivity and stability.