RESOURCES & NEWS

Resources & News

Technical insights on MPCVD process, rough quality and thermal materials, plus company news.

TECHNICAL & INDUSTRY INSIGHTS

Technical & Industry Insights

13 independent analyses — every figure and conclusion is sourced and verifiable.

Sourcing & Selection

Process routes, quality assessment and equipment selection — what to settle before you buy.

MPCVDHPHT2026-07 · 6 min

MPCVD vs HPHT: Which Lab-Grown Diamond Method to Choose?

A comparison of the two mainstream lab-grown diamond methods — principle, clarity, cost and use cases — to help you choose.

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CVD RoughQualityUpd. 2026-07-26 · 5 min

How to Judge CVD Rough: Five Key Dimensions

Color, clarity, crystal form, size and certification — five dimensions for evaluating CVD rough and avoiding low-grade material.

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Single-CrystalPolycrystalline2026-07 · 7 min

Single-Crystal vs Polycrystalline Diamond for Thermal Management

Behind the near-2× thermal conductivity gap lies grain-boundary scattering — the materials science of why single-crystal wins for high-end thermal management.

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MPCVD system selectionMPCVD reactor typesUpd. 2026-07-26 · 9 min

How to Choose an MPCVD System: 10 Things to Settle Before You Sign

MPCVD procurement rarely goes wrong because of growth rate. It goes wrong because three things were never quantified: sustainable plasma power density per unit of deposition area, the field uniformity dictated by cavity topology and holder geometry, and the hours the machine actually runs. Drawing only on published literature and vendor-disclosed data, this guide dissects MPCVD versus HFCVD and DC arc-jet, the four dominant cavity topologies, the 2.45 GHz / 915 MHz trade-off, the power-to-area-to-height arithmetic, six acceptance metrics that belong in the contract, and the total cost of ownership structure buyers routinely underestimate.

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MPCVD SystemsEquipment SelectionUpd. 2026-07-26 · 9 min

How to Read MPCVD "Generations": The Eight Parameters That Actually Change, and ENTASK's Confirmed Facts by Generation

"Generation N" has no standard definition in the MPCVD industry - it is each vendor's internal naming, not an industry norm. So asking "which generation is this" yields nothing comparable. The question to ask concerns the eight parameters that genuinely change between generations: microwave frequency and power-source architecture, chamber topology, microwave power, growth-area diameter and crystal growth height, thermal-field and chamber-pressure control precision, control and monitoring architecture, reliability definitions, and single-run yield with batch consistency. This article sets out those criteria and how to verify each, then lists ENTASK's CONFIRMED facts by generation: Gen-2 (entered production 2024, over 300 carats total output, rough thickness reaching 10 mm), Gen-4 (the 10 kW series), and the Gen-4.5 and Gen-5 currently offered (in-house E-MG010K at 2450 MHz, 10 kW / 15 kW; 10 kW gives a 92 mm growth area with 12 mm crystal growth height, 15 kW a 120 mm growth area). It closes with an item-by-item Gen-4 / Gen-4.5 / Gen-5 comparison (growth stage 92 / 102 / 120 mm, maximum growth thickness 12 / 15 / 15 mm, 14 / 20 stones per run, 200 / 300 ct monthly) and flags one inconsistency for the company to settle (Gen-4.5 at 102 mm by generation versus 92 / 120 mm by power); public technical detail on Gen-1 and Gen-3 is genuinely missing, and this article does not fill that gap with conjecture.

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Frontier Applications

AI compute cooling, high-power optics, quantum sensing — the frontiers diamond is opening.

GaN on diamonddiamond heat spreader AI GPUUpd. 2026-07-26 · 10 min

GaN-on-Diamond and the Thermal Ceiling of the AI Compute Era: The Bottleneck Is the Interface, Not the Diamond

NVIDIA's own reference architecture now budgets up to 142 kW for a single GB300 NVL72 rack, while the modal rack in the global installed base still sits near 9 kW — an order-of-magnitude split between the frontier and the installed base. Liquid cooling solves transport at rack level; the real ceiling is the last millimetre between junction and cold plate. Copper, SiC and AlN have run out of headroom, diamond is an order of magnitude above them, and yet most of that advantage is consumed by thermal boundary resistance. This piece works through the published record on GaN-on-diamond (11 W/mm at 10 GHz, >3.5x areal power density, TBR driven from ~220 down to ~3.1 m²K/GW), the single-crystal versus polycrystalline split in near-interface conductivity (measured grain conductivity of 638 W/m·K against >2000 for bulk grades), and what all of this means for material suppliers: the spec sheet is shifting from carat and colour to thickness tolerance, bondable surfaces and lot-to-lot consistency.

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diamond optical windowhigh power laser windowUpd. 2026-07-26 · 10 min

Diamond Optical Windows: The Last Material Standing in High-Power Laser and Extreme-Environment Optics

Above a few kilowatts, the first-order criterion for a window is not its absorption coefficient but how much optical path distortion each deposited watt produces. CVD diamond absorbs one to two orders of magnitude more than ZnSe at 10.6 µm and still wins, because thermal lensing scales with (dn/dT)/κ — where diamond leads by nearly three orders of magnitude. This article assembles verifiable literature and vendor data on diamond's intrinsic optical parameters, a quantitative comparison against ZnSe, Ge, GaAs and sapphire, real engineering cases from ITER gyrotron windows to synchrotron beamline foils, and a tolerance-and-acceptance checklist that can go straight into a purchase specification.

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NV center diamondquantum sensing diamondUpd. 2026-07-26 · 9 min

NV-Center Diamond: The Material Substrate Beneath Quantum Sensing and Quantum Computing

For NV-center diamond, technical risk has migrated from physics to materials. Millisecond room-temperature spin coherence, single-spin optical readout and picotesla-class magnetometry are all established in the literature; what actually gates commercialization is the ability to grow, repeatably, single crystals that are 12C-enriched, nitrogen-limited at the ppb level, low in dislocation density, correctly oriented and surface-controlled. This piece walks through the physics and the deployed applications, then explains why gem-grade capacity and quantum-grade supply sit on almost entirely different curves.

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Industry Insights

Independent analysis of industrialisation paths, global supply-demand and capacity cycles.

diamond semiconductorultra wide bandgapUpd. 2026-07-26 · 9 min

Industrializing Diamond Semiconductors: What Still Separates the Material from the Device

Diamond's bottleneck has never been physics — it is a reproducible wafer and a usable n-type layer. Drawing on peer-reviewed literature and the industry moves of 2026, this piece maps where diamond's "ultimate semiconductor" advantage is real, where n-type doping and dislocation density still block device-grade material, which segments already generate revenue (thermal management, high-power optics, quantum sensing), and what size and capacity actually constrain. The takeaway for investors and buyers: carat output is not electronic-grade capability.

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CVD Rough Supply ChainSurat Lab Grown DiamondUpd. 2026-07-26 · 10 min

The Global CVD Rough Supply Chain in 2026: Two Rough Chains, Not One

In FY2025-26 India's lab-grown diamond exports overtook natural stones by volume for the first time (18.84m vs 16.00m carats) — yet contributed under 10% of diamond export value. Volume leadership is not value leadership. Drawing on GJEPC quarterly data, IDEX industry figures and wholesale price indices, this piece dissects the one-directional 'grown in China, cut in India' chain: its real structure, its price cycle, its policy exposure, and why large-format rough is the one battlefield the price war has not yet flattened.

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Largest CVD RoughLab-Grown RecordsUpd. 2026-07-26 · 15 min

How Big Is the Largest CVD Diamond Rough? The Three Different 'Largest' Records Across CVD and HPHT, Verified (2026)

“Who grows the largest CVD diamond?” is really three unrelated questions: rough single crystals (carats and millimetres), polished carat weight, and wafer or substrate diameter. Answering the CVD question first: the largest CVD rough in public reporting is 190 ct (Ethereal Green Diamond, cut into a 75.33 ct stone), with no three-axis millimetre figures published. One thing usually left vague needs stating plainly: ranked by carat weight, that 190 ct CVD figure is the largest gem-grade rough to appear in public reporting, and this article does not demote it for being CVD. The real difference is evidence quality. The 190 ct figure appears only as a mention inside coverage of the 75.33 ct polished stone, with no standalone announcement and no three-axis dimensions; whereas the crystals explicitly announced as records and backed by a laboratory analysis both come from the HPHT route: Meylor Global's 150.42 ct (IGI analysis, January 2022, 28.55 x 28.25 x 22.53 mm, both crystals in that analysis being type IIb, with full dimensions published) and Henan Liliang Diamond's 156.47 ct as reported on 16 October 2025 by Dahe Daily / Yu Video via Tencent News (described there as IGI-verified, with no dimensions and no report number verifiable online). This article therefore declares no unconditional carat record. The laboratory-traceable polished milestones — not an exhaustive list — run 12.75 ct (IGI, Nov 2020), 14.60 ct (IGI, Aug 2021), 16.41 ct (GIA, Jan 2022), 30.18 ct (IGI, Jun 2022), 34.59 ct (GIA, May 2023) alongside 35.00 ct (IGI, May 2023), 50.25 ct (IGI, Jun 2023) and 75.33 ct (IGI, May 2024) — and GIA's own Gems & Gemology, Summer 2024, records the 75.33 ct stone as “the largest faceted example to date”. On wafers and substrates: Diamond Foundry's 100 mm first wafer (a single-piece milestone, the company's own claim) and the Element Six / Orbray reproducible 3-inch process; Henan Liliang's 247.82 ct crystal (45 x 43 mm, announced July 2026) is framed by the original report as a seed crystal for functional materials rather than gem rough, so this article treats it in that section only. The article explains why size claims are meaningless without a stated quality grade, and gives buyers an executable verification checklist.

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China Lab Grown Diamond ManufacturersChinese MPCVD Equipment CompaniesUpd. 2026-07-26 · 14 min

China Lab-Grown Diamond & CVD Diamond Industry Map: Which Companies, Where They Are, and What They Actually Make (2026 Edition)

A verifiable roster of China's synthetic diamond and lab-grown diamond industry: who runs HPHT, who runs MPCVD, which companies build MPCVD reactors, where each sits in the diamond chain, and which category of supplier fits which sourcing need. Every industry statistic is attributed and its denominator stated — China produced roughly 22 million carats of lab-grown diamond in 2024, about 63% of global output (People's Daily Online, citing the 2024 report on China's jewellery industry); China accounts for over 90% of global diamond output and Henan for over 80% of national capacity (Huifeng Diamond 2025 annual report); Henan accounts for over 80% of national synthetic diamond output (North Industries Group Red Arrow (China North Industries Group / NORINCO) 2025 annual report). This map deliberately carries no revenue, profit or other financial figures for any company — those change every quarter and go stale fast, so consult each company's latest periodic report directly. What this article does is establish who exists, where they are, what they make, and where the evidence is. It is a map, not a ranking, and it passes no judgement on any company.

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Henan DiamondIndustry CommentaryUpd. 2026-07-28 · 8 min

Losing Touch With "the Masses": Lessons From the Rise and Struggle of Henan's Diamond Industry

If one were to find the most fitting footnote to sixty years of rise and struggle in Henan's diamond industry, Mao Zedong's formulation "from the masses, to the masses" may cut through the fog of history and touch precisely on today's pain. It is not merely a political slogan but a dialectic about understanding and remaking the world: correct understanding arises from practice (the masses), and must ultimately return to practice to be tested. Examined through that logic, the trajectory of Henan's diamond industry was made by "the market" and is now undone by it. This article works through three disconnects in turn: a lagging technology path, new growth tracks reduced to capital-markets storytelling, and world-leading capacity paired with no pricing power at all.

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COMPANY NEWS

Company News

Company news archive, last updated February 2024.

Xi'an Science & Technology Bureau achievement transformation event

2024-02-15

ENTASK Semiconductor attends the sci-tech achievement transformation matchmaking event hosted by Xi'an Science & Technology Bureau

Chanba district officials visiting Chang'an University Science Park

2024-01-12

Chanba Ecological District Party Secretary Yang Liuqi visits Chang'an University Science Park to inspect sci-tech innovation