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Suzhou Zhicai’s 6-Inch MgO Target Could Strengthen China’s MRAM Supply Chain
Suzhou Zhicai reportedly developed and qualified a 6 inch MgO sputtering target for MRAM magnetic tunnel junctions, with 4N purity and density above 99.8%. The target matters because MgO forms the ultrathin barrier in an MRAM magnetic tunnel junction, where purity, density, grain structure, and uniformity can affect...
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Key takeaways
- Suzhou Zhicai reportedly developed and qualified a 6 inch MgO sputtering target for MRAM magnetic tunnel junctions, with 4N purity and density above 99.8%.
- The target matters because MgO forms the ultrathin barrier in an MRAM magnetic tunnel junction, where purity, density, grain structure, and uniformity can affect device consistency and manufacturing yield.
- The announcement supports China’s effort to localize critical MRAM materials, but “closing the last foreign controlled gap” remains an industry claim rather than a demonstrated nationwide production outcome.
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openai.comCreate a landscape editorial hero image for this Studio Global article: What was Suzhou Zhicai Technology’s August 21, 2026 breakthrough in developing and qualifying a 6-inch, 4N-purity, over-99.8%-density, inter. Article summary: Suzhou Zhicai’s reported breakthrough was a 6-inch MgO sputtering target for the magnetic-tunnel-junction (MTJ) barrier in MRAM: 4N purity (99.99%), density above 99.8%, and claimed international-grade grain uniformity. . Topic tags: general, general web. Style: premium digital editorial illustration, source-backed research mood, clean composition, high detail, modern web publication hero. Use reference image context only for broad subject, composition, and topical grounding; do not copy the exact image. Avoid: logos, brand marks, copyrighted characters, real person likenesses, fake screenshots, UI text, readable text, watermarks, charts with fake numbers, clic
Suzhou Zhicai Technology’s reported milestone is a 6-inch magnesium-oxide (MgO) sputtering target intended for the magnetic tunnel junction (MTJ) used in MRAM. The reported specifications are 4N purity—99.99%—density above 99.8%, and grain uniformity described as meeting international-advanced levels. A separate industry report compares that density with a stated figure above 99.7% for mainstream Japanese targets. 2
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The important qualification is evidentiary: the available public reporting describes the product as qualified for MRAM MTJ production, but does not provide an independent customer dataset covering wafer lots, electrical results, reliability, or sustained volume production. The comparison with Japanese targets is therefore a useful reported benchmark, not a complete product-to-product qualification record.
What the MgO target does in an MRAM cell
MRAM stores information through the relative magnetic orientation of layers in an MTJ rather than by retaining electrical charge in the way conventional charge-based memories do. MgO is used as the ultrathin insulating barrier between magnetic layers. Its material quality and deposition behavior are consequently important to the tunnel junction’s electrical characteristics and manufacturing repeatability.
China’s engineering research community has specifically identified high-purity, high-density MgO MTJ sputtering targets as a priority for new-memory development and industrialization. The same research direction emphasizes controlling impurities and improving target microstructure, grain size, orientation, distribution, uniformity, and defect density. 4
That explains why a target can be strategically important even though it is only one component in a memory device. A nominal purity number alone does not establish device performance; fabs also need stable sputtering behavior, uniform films, predictable junction characteristics, acceptable yield, and reliability across production lots.
How the reported specifications compare
The reported product has three headline attributes:
- 6-inch format: a target size intended for semiconductor sputtering equipment and MRAM process development.
- 4N purity: 99.99% MgO purity. A materials-industry reference places 4N purity within the range commonly associated with magnetic-recording and thin-film applications, although semiconductor requirements vary by process and use case.
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- More than 99.8% density: slightly above the more-than-99.7% density cited in the available comparison with mainstream Japanese MgO targets.
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The density difference is small on paper, and it should not be presented as proof that Zhicai’s target is categorically better. For a sputtering target, the practical test is whether the material delivers the required film uniformity and device results under a customer’s process conditions. The public sources supplied here do not include a controlled side-by-side MRAM qualification report.
Does it close China’s last foreign-controlled MRAM materials gap?
Industry coverage describes the target as completing China’s domestic supply for the MRAM target-material stack and removing an overseas-controlled bottleneck from domestic MRAM pilot lines. 2 Another report says the product gives Chinese MRAM manufacturers and research institutions a domestically controllable supply option.
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Those are significant supply-chain claims, but they need careful framing. The available evidence supports the existence of a reported domestic MgO option; it does not establish that every Chinese MRAM fab has qualified the material, that imports are no longer needed, or that all dual-source or export-related supply pressure has disappeared.
The date also requires clarification. The most directly relevant announcement in the supplied sources is dated August 12, 2026. An August 21 record concerns publication of a Chinese patent application for a high-uniformity oxide-target preparation method, but the source does not establish that the patent publication itself was the date of the MRAM-target qualification announcement. 1
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Why MRAM is attracting attention
MRAM’s appeal is the combination of non-volatility and fast, durable operation. It can retain data without continuous power while offering the potential for low-latency access and high write endurance. These characteristics are relevant to systems that need rapid restart, frequent updates, predictable response, or resilience after power interruption.
Reported and documented application directions include:
- Automotive controllers: embedded MRAM can provide local non-volatile storage for code and data in vehicle-control systems. A separate report describes a Chinese vehicle-control MCU with 16 MB of MRAM in stable volume delivery, although that product milestone is distinct from Zhicai’s target announcement.
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- Aerospace and defense: Everspin describes its STT-MRAM products as non-volatile memory for aerospace, defense, and other mission-critical embedded systems.
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- Edge and AI controllers: embedded MRAM is being explored for advanced-node systems that need local, power-efficient memory. Market reporting cites qualified 22 nm and 28 nm embedded processes and continuing work at smaller nodes, though market-report claims should not be treated as universal process availability.
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- Harsh environments: reports on MRAM demonstrations emphasize non-volatility, wide-temperature operation, and radiation-related advantages in applications such as flight control. These claims are application-specific and depend on the complete memory design and qualification, not just the MgO target.
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Some comparisons in industry commentary describe MRAM as approaching DRAM-like speed or offering dramatically lower latency than NAND. The supplied evidence does not independently substantiate a universal “one-thousandth of NAND latency” figure, so that number should be treated as a marketing comparison rather than a general benchmark.
MRAM industry progress is real, but market forecasts disagree
The broader MRAM sector is showing activity across stand-alone memory, embedded memory, automotive electronics, and specialized systems. Supplied reporting cites an 8 nm embedded-MRAM AI-chip tape-out, a drone flight-control demonstration using SOT-MRAM, and the completion of an 8-inch MRAM production line in Qingdao. These milestones represent different stages of development—from tape-out and demonstration to manufacturing-line claims—and should not automatically be read as evidence of broad commercial volume. 51
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Market forecasts are particularly inconsistent. One forecast projects the market from $4.49 billion in 2025 to $86.78 billion in 2034 at a 38.97% compound annual growth rate. Another estimates $4.43 billion in 2026 and $18.24 billion in 2031 at a 32.72% CAGR, while a separate estimate projects $1.18 billion in 2026 and $4.65 billion in 2034. 17
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The spread is too large to describe any single projection as consensus. The safest conclusion is that MRAM is attracting substantial development and investment, while the eventual market size depends on adoption, manufacturing economics, technology choices, and the pace of embedded-memory qualification.
Zhicai’s broader materials strategy
The MgO development fits Zhicai’s stated positioning in two related areas: high-temperature-superconducting materials and semiconductor critical materials. The Suzhou Industrial Park authority describes the company as being founded by a national talent-program recruit together with target-material scientists and as having experience in oxide-target research, production, and commercialization. 9
The company’s ReBCO work provides useful context, although it is separate from the MRAM target. Public institutional reporting says Zhicai obtained export permission and delivered an initial batch of ReBCO high-temperature-superconducting targets to a U.S. customer. The same reporting describes the company as China’s only and one of three global suppliers with a complete ReBCO-target solution. 8
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A Chinese Academy of Sciences verification report said a specified Zhicai ReBCO target performed comparably with an equivalent Japanese imported target on superconducting transition temperature and critical-current density, with differences within experimental error, subject to batch and scale-up stability. 33
That history makes the MgO move strategically coherent: both products rely on demanding oxide-target processing and consistent thin-film deposition materials. But the commercial test for the MRAM product will be more demanding than headline specifications. The decisive evidence would include independent lot-to-lot data, customer-fab qualification, MTJ electrical performance, reliability testing, production yield, and repeat orders.
Bottom line
Zhicai’s reported 6-inch MgO target is best understood as a potentially important localization milestone for China’s MRAM supply chain, not yet as proof that the country has eliminated all foreign dependence or achieved broad commercial replacement. Its reported 4N purity and density above 99.8% compare favorably with the cited Japanese density benchmark, while the strategic value lies in supplying a critical MTJ material from a domestic source. 2
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MRAM itself continues to advance in automotive, aerospace, industrial, and edge-computing applications, but the technology’s commercial trajectory and market size remain uncertain. For Zhicai, the next meaningful milestone is not another specification announcement—it is independently documented, repeatable qualification in real production lines.
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Suzhou Zhicai reportedly developed and qualified a 6 inch MgO sputtering target for MRAM magnetic tunnel junctions, with 4N purity and density above 99.8%.
What are the key points to validate first?
Suzhou Zhicai reportedly developed and qualified a 6 inch MgO sputtering target for MRAM magnetic tunnel junctions, with 4N purity and density above 99.8%. The target matters because MgO forms the ultrathin barrier in an MRAM magnetic tunnel junction, where purity, density, grain structure, and uniformity can affect device consistency and manufacturing yield.
What should I do next in practice?
The announcement supports China’s effort to localize critical MRAM materials, but “closing the last foreign controlled gap” remains an industry claim rather than a demonstrated nationwide production outcome.