CVD Diamond in Chinese 2025 Annual Reports: Attention Is High, Profit Is Hard
Chinese listed-company reports show CVD diamond moving beyond jewellery into functional materials, but ramp costs, qualification, product mix, and weak utilization can prevent technical progress from becoming profit.
I reviewed 2025 disclosures from several Chinese companies with diamond exposure, including Power Diamond, Huanghe Whirlwind, Sinomach Precision, Sifangda, Worldia, Huifeng Diamond, Hengsheng Energy, and North Industries Red Arrow.
The common signal is a transition. The sector can no longer be described only through lab-grown jewellery. Companies are discussing thermal spreaders, optical windows, acoustic diaphragms, conductive diamond electrodes, semiconductor tooling, precision machining, and substrate-related work.
The financial signal is less celebratory: technical activity does not automatically create attractive margin.
Jewellery-grade growth has entered ordinary industrial competition
The source article reports substantial margin compression in lab-grown diamond categories and losses in parts of traditional superhard-material operations. The direction is consistent with a market moving from scarcity to competition over cost, yield, channel, and inventory.
This matters because consumer-grade cash flow cannot be assumed to fund every functional-diamond programme. When the base business weakens, long qualification cycles become harder to finance.
Functional CVD products can be expensive to ramp
Sifangda’s 2025 annual report discusses CVD diamond for applications including optical windows and chip heat spreaders. The Chinese source notes rapid growth in a mixed “other” category alongside very low margin. That category cannot be treated as a pure measure of CVD diamond, but the pattern is plausible for an early ramp: depreciation, unstable yield, customer qualification, small orders, and underutilized equipment can absorb the apparent material premium.
Worldia reported a broad application portfolio in the source article, including heat spreaders, automotive acoustic diaphragms, conductive diamond, large-area thermal concepts, and precision substrate processing. These disclosures indicate product-development breadth. They do not establish that every route has reached repeatable commercial margin.
Hengsheng Energy provides another kind of warning: installing reactors is the beginning of production learning, not its end. Process standardization, product colour or grade, yield ramp, equipment coordination, and selling price determine whether installed capacity becomes cash-generating capacity.
The less glamorous semiconductor route may monetize earlier
Sinomach Precision’s disclosures point toward diamond-structured tools and consumables used in semiconductor manufacturing. Dicing tools, grinding wheels, ceramic carriers, vacuum chucks, and related process products may appear less ambitious than a diamond semiconductor wafer, but they can sit closer to established orders and qualification systems.
This suggests that high-value diamond commercialization does not have to begin with an active diamond device. A company may create stronger economics by solving a narrow manufacturing problem with defensible processing and customer knowledge.
Read every financial number with its segment boundary
Annual reports rarely isolate CVD thermal material cleanly. “Other products,” “superhard materials,” or “diamond structured applications” can include multiple technologies and maturity stages. Revenue growth in a mixed category is not proof of one product’s adoption; a negative mixed margin does not prove every CVD item is unprofitable.
The useful framework is therefore a chain of evidence:
material preparation → finishing → customer qualification → repeat orders → stable gross margin → reproducible capacity expansion.
At the end of 2025, many disclosures suggest movement from “do we have the technology?” toward “do we have a product?” Fewer establish the final step: “does the product produce durable profit and cash flow?”
The next annual-report cycle should be judged through utilization, accepted yield, recurring customers, product-level disclosure, margin quality, and cash conversion—not through the number of times “CVD,” “semiconductor,” or “thermal management” appears.
Continue the research
Evidence limits and uncertainties
- Segment categories often combine CVD diamond with other products, so segment revenue and margin cannot be attributed entirely to CVD diamond.
- Customer certification and technical milestones are company disclosures unless independently verified.
Sources
- Sifangda 2025 Annual Report｜CNInfo