Diamond-thermal-industry-new-development

Diamond Thermal-Management Industry Enters a New Phase of Growth

As AI compute demand keeps surging, the power density of high-performance chips such as GPUs and ASICs continues to climb, and the cooling bottleneck is shifting from system-level heat exchange to near-chip heat transfer. With copper- and aluminum-based heat sinks approaching their physical limits, diamond-based thermal management is moving rapidly from the laboratory toward industrial deployment. Over recent months, a number of listed superhard-materials companies have entered this track, and the industry is widely seen as stepping into its first year of industrialization.

1. AI chip power keeps climbing, cooling becomes the bottleneck

Driven by the rapid growth of large-model training and inference workloads, the power density of high-performance chips keeps rising. Traditional thermal solutions that rely on copper heat sinks and heat pipes are already close to the materials' own physical ceiling, and struggle to dissipate heat fast enough under ultra-high heat-flux conditions. Under heavy loads, chips easily develop localized hot spots and high core temperatures, triggering performance throttling or even system instability - cooling has become a key constraint on further AI compute expansion.

2. Three factors converge: the "first year of industrialization"

CITIC Securities notes that the diamond thermal-management industry is being driven by three forces at once: first, the steep rise in AI chip power density, which demands better near-junction cooling; second, traditional metal heat-dissipation materials approaching their physical limits and in need of alternatives; and third, continuous improvements in diamond synthesis and processing technology, with falling costs and improving yields. The resonance of these three factors points to an investment opportunity in what the brokerage calls the first year of industrialization for the diamond thermal-management sector.

Diamond's combination of properties is striking: room-temperature thermal conductivity of 2,000–2,200 W/(m·K) - roughly five times that of pure copper; a coefficient of thermal expansion of about 1.0–1.5×10⁻⁶/K, closely matched to silicon, SiC and other chip materials; plus good electrical insulation and high thermal stability. Together these significantly improve hot-spot spreading and reduce thermal resistance near the chip junction.

3. Listed companies move in: samples and small-batch shipments begin

According to media reports, over recent months multiple listed companies in the traditional superhard-materials sector have issued investment announcements and revised fundraising plans, extending their businesses into diamond thermal management. As related projects move from announcement to execution, some of their diamond thermal products have entered customer sampling and small-batch supply stages, clearly accelerating the path to commercialization.

Among them, Sifangda's CVD diamond heat spreaders have passed customer testing, with validation on track and small-batch trial orders received; the products are suitable for thermal management in high-end electronic devices. Guoli Electronics supplies high-power magnetrons - a core component of MPCVD equipment - which support diamond thermal-management production, and has achieved small-scale supply.

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Outlook

From lab samples to small-batch shipments, and from process optimization to production-line deployment, diamond thermal management is undergoing a critical transition from a "hot topic" to a "core requirement." As AI compute keeps expanding and synthesis technology matures, this track is expected to reach large-scale adoption over the coming years, providing more efficient thermal-management solutions for high-end electronics and frontier technology.

Disclaimer: This article is provided for general information only and does not constitute investment advice or a basis for business decisions. Technical parameters, market data and company information cited herein are drawn from public sources and industry reports; we make no representation as to their accuracy, completeness or timeliness. The actual performance of diamond thermal products depends on manufacturing processes, formulations and application conditions, and thorough testing and evaluation are recommended before adoption. For republication or citation, please contact huicetools and credit the source.