Single-Crystal and Polycrystalline CVD Diamond
For the most demanding applications, single-crystal CVD diamond heat spreaders offer the ultimate thermal performance, with thermal conductivities exceeding 2,000 W/(m·K). Polycrystalline diamond films, meanwhile, provide a cost-effective alternative with conductivities around 1,500 W/(m·K) .
Significant industry milestones include Akish Systems' delivery of diamond-cooled NVIDIA H200 GPU servers, as well as NVIDIA's announcement at CES 2026 that its next-generation Vera Rubin architecture will adopt diamond-copper composite thermal interfaces combined with 45°C direct liquid cooling .
China's Strategic Position
China holds a commanding position in the diamond heat dissipation supply chain, accounting for over 95% of global industrial diamond production capacity, with more than 80% concentrated in Henan Province . This production base provides a critical foundation for scaling diamond thermal management solutions.
Domestic companies are racing to commercialize their offerings:
1. Sifangda has passed overseas customer testing for diamond heat spreaders and is constructing a 25,000-piece annual CVD diamond heat spreader production facility in Shaya .
2. Sinomach Precision has sent samples to customers in the civilian sector, with small-batch orders expected within the year .
3. Liliang Diamond is actively engaging with multiple domestic semiconductor and technology companies on diamond heat dissipation products .
4. Huanghe Whirlwind plans to deploy 300 MPCVD machines within three years to achieve annual production of 150,000 large-format diamond heat spreaders .
5. Worldia has established a diamond semiconductor application project department and developed 12-inch diamond heat dissipation wafers with excellent flatness .
Challenges and the Path Forward
Despite the promising outlook, significant challenges remain before diamond heat dissipation achieves widespread market penetration. Industry experts caution that the transition from sample validation to large-scale commercial production represents a substantial hurdle .
Key challenges include:
1. Technical barriers: The fundamental incompatibility between diamond and copper presents ongoing challenges for interface thermal resistance control. Achieving the necessary adhesion and minimizing thermal resistance at the diamond-metal interface requires advanced surface metallization and alloy design .
2. Cost constraints: While copper-diamond composites cost only one-fifth to one-tenth as much as pure diamond heat spreaders, they remain significantly more expensive than conventional copper solutions, limiting adoption to high-performance applications .
3. Long validation cycles: Semiconductor-grade thermal materials must pass rigorous reliability certifications, including 1,000-hour high-temperature high-humidity tests, resulting in validation cycles that extend six months or more .
4. Immature industrial ecosystem: The supply chain from material production to chip design, packaging, and system integration remains fragmented, with no unified reliability standards yet established .
Conclusion
The diamond heat dissipation market is at an inflection point where materials science breakthroughs intersect with urgent system-level demands. With projected market size reaching USD 15.24 billion by 2030, diamond-based thermal solutions are poised to become essential enablers of next-generation AI infrastructure, high-performance computing, electric vehicles, and advanced communications.
As liquid cooling becomes the baseline for high-power GPUs, materials innovation is emerging as the next competitive frontier in thermal management. Diamond, with its unmatched thermal properties, represents not just an incremental improvement but a transformative solution to the industry's most persistent thermal challenges . Organizations that successfully navigate the commercialization hurdles-achieving cost-effective production, securing customer validation, and building robust industrial ecosystems-will be well-positioned to capture significant value in this rapidly growing market.
