Diamond-The Game-Changing Material Across Three Industrial Tracks
Sep 13, 2026
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Diamond: The Game-Changing Material Across Three Industrial Tracks – From Machining Tools to the Ultimate Semiconductor
(Diamond Semiconductor Properties)
Against the backdrop of rapid iteration in the global advanced materials industry, diamond has long transcended its identity as a jewelry gemstone to become a transformative material spanning three core industrial tracks: precision machining, high-efficiency thermal management, and next-generation semiconductors. With its extreme hardness, thermal conductivity and semiconductor properties, diamond is evolving from the traditional "industrial teeth" into a critical foundational material underpinning advanced manufacturing and the electronic information industry.
01 Machining: The Hardness Benchmark for Precision Manufacturing
Diamond is the hardest naturally occurring substance on Earth, with a Mohs hardness of 10. Its crystal structure consists of carbon atoms bonded through sp³ hybridization to form a stable tetrahedral lattice, delivering exceptional hardness and wear resistance that serves as the universal benchmark for material hardness.
With outstanding grinding performance on hard, brittle and high-toughness materials, diamond plays multiple roles in mechanical machining, including cutting tools, abrasives, coatings, wire saws, grinding wheels and drill bits, covering nearly all industrial processing scenarios.
As emerging industries such as new energy vehicles, photovoltaics and semiconductors grow rapidly, demand for high-precision, low-damage machining continues to rise, further highlighting the value of diamond tools. Throughout the semiconductor manufacturing process – from ingot slicing, wafer thinning and precision polishing to dicing – diamond materials are indispensable:
- ▸ Diamond wire saw: With a kerf width of less than 0.5mm, ideal for high-precision cutting of hard and brittle materials such as sapphire, crystal and solar-grade polysilicon;
- ▸ Diamond grinding wheels: Widely used in silicon and sapphire processing, covering ingot preparation, wafer rough grinding and finish grinding;
- ▸ Diamond conditioner: In CMP (chemical mechanical polishing) processes, it dresses and regenerates polishing pads, restores surface roughness and maintains polishing stability;
- ▸ Diamond polishing slurry: Available in polycrystalline, single-crystal and nanodiamond grades, with nanodiamond slurry meeting the ultra-smooth surface requirements of the semiconductor industry.
02 Thermal Management: The Cooling Solution for the AI Computing Era
The global AI race has driven chip power consumption to unprecedented levels: NVIDIA's H100 reaches 700W per card, the new Blackwell series ranges from 1000W to 1400W, and the latest Vera Rubin architecture GPU peaks at over 2300W. Conventional copper and aluminum thermal materials are approaching their physical limits, making thermal bottleneck a core constraint on computing performance.
In this context, diamond has emerged as a leading thermal solution thanks to its exceptional thermal conductivity. Diamond achieves a room-temperature thermal conductivity of 2000–2100 W/(m·K), approximately 5.5 times that of copper and 11 times that of aluminum. It is also electrically insulating, with a coefficient of thermal expansion closely matched to silicon, SiC and GaN, making it an ideal high-end thermal substrate.
Test data shows that inserting a thin diamond heat spreader between the chip and the heat sink can reduce core temperature by more than 30°C, doubling chip lifespan and unlocking approximately 30% additional computing performance. The industry widely agrees that when single-chip power exceeds 1400W, diamond thermal solutions will shift from an "option" to a "necessity".
The most mature commercial product today is diamond-copper composite, which combines diamond's ultra-high thermal conductivity with copper's electrical conductivity, machinability and moderate cost, achieving thermal conductivity above 700 W/(m·K) – far exceeding pure copper. Leading companies including Huawei and NVIDIA have already adopted the technology: Huawei's team, in collaboration with Xiamen University, achieved breakthroughs in diamond low-temperature bonding and glass interposer technology; NVIDIA's new Vera Rubin GPU architecture fully adopts a "diamond-copper composite + 45°C direct liquid cooling" solution. 2026 is also regarded by the industry as the "first year of large-scale diamond thermal application".
(Diamond-copper composite material)
03 Semiconductor Substrate: The Ultimate Semiconductor for Next-Generation Power Electronics
Beyond hardness and thermal conductivity, diamond's semiconductor properties are equally disruptive. With a bandgap of 5.5 eV, diamond offers exceptional performance including high electron mobility (4500 cm²/Vs), high electron saturation velocity (2×10⁷ cm/s) and high breakdown field strength (10⁷ V/cm). Its Johnson figure of merit for power devices is 10 times that of SiC, earning it the industry title of the "ultimate semiconductor".
As SiC and GaN power electronics enter a mature stage, demand continues to grow for next-generation high-power, high-frequency, high-temperature and low-loss electronic devices, positioning diamond substrate as the most promising core material.
Diamond semiconductors are currently at a critical stage of transition from laboratory to industrialization. Low n-type doping efficiency and difficulties in producing large-diameter wafers remain major industry challenges. However, multiple wafer fab projects are accelerating worldwide, and diamond is evolving from "industrial teeth" into a core substrate material for next-generation electronic technology.
★ Summary
From the "industrial teeth" of precision machining, to the cooling solution for the AI computing era, and the core substrate for next-generation power semiconductors, diamond continues to deliver game-changing performance across three industrial tracks thanks to its unique physical and chemical properties.
Although large-scale industrialization still faces technical challenges, ongoing breakthroughs in synthesis and processing are expected to position diamond as a key enabler of the next industrial revolution, empowering advanced manufacturing and the electronic information industry.
Disclaimer
This article is an industry technical interpretation compiled from publicly available information, for industry reference and communication only. It does not constitute any technical, investment or operational decision-making basis. The product performance and application cases mentioned herein only represent the public information of relevant enterprises. We make no express or implied warranties regarding the accuracy or completeness of the data.
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