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A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11Not on the evidence currently available. Nantero’s carbon-nanotube memory, known as NRAM, has credible technical demonstrations and a long-running commercialization effort. But the latest reviewed industry account, published in 2024, said Fujitsu’s demonstrated NRAM macro was not listed as a product. The sources reviewed do not establish commercial shipments or a newer launch as of October 5, 2026.
What NRAM is—and what it is supposed to do
Nantero’s NRAM is nonvolatile memory built around a fabric of carbon nanotubes. In the description by Hellenbrand, Teck, and MacManus-Driscoll, set and reset voltages open or close connections between adjacent nanotubes, changing the cell’s resistance to represent stored information. Because it is nonvolatile, the intended memory would retain data without power.
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NRAM has been proposed for uses ranging from embedded memory to larger memory systems. Those are potential applications, not evidence that a commercial product for any of them is available.
The 2024 review summarizes Nantero technology claims of projected retention lasting hundreds of years across temperatures from −55 to 300 °C, programming with 5 ns pulses, and scaling to 15 nm. These are reported technology figures, not guarantees for a qualified product or independently validated system specification.
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The clearest product-readiness distinction in the available reporting is between a demonstrated memory macro and a memory product for sale. The 2024 review reports that Fujitsu had demonstrated an NRAM macro fabricated on 55 nm CMOS, but says it was “not yet listed as a product.” The review’s figures describe that demonstration, not a generally available component.
| Measure reported for Fujitsu’s 55 nm NRAM macro | Reported figure | Important context |
|---|---|---|
| Set/reset voltage | 2.5 V / 3.5 V | Values reported for the macro demonstration in the 2024 review. |
| Array-level speed | 200 ns / 100 ns | Array-level measurements; they should not be conflated with individual-cell switching. |
| Individual-cell switching | 0.5 ns | A cell-level figure, not the array-level speed. |
| Read voltage | 0.5 V | Reported by the 2024 review. |
| Retention | 105 hours at 150 °C | Extrapolated retention, not a directly observed product lifetime. |
| Write endurance | 106 cycles | Reported demonstration figure, not a commercial system rating. |
All figures in the table are from Hellenbrand, Teck, and MacManus-Driscoll’s 2024 review of emerging nonvolatile memory technologies. The review presents a technical demonstration; it does not establish volume production, a qualified part number, or product availability.
Why earlier launch expectations are not confirmation
In an EE Times interview published August 10, 2022, Nantero CEO Rob Snowberger said, “We have transitioned the company from a licensing focus to a product focus.” He described an ongoing Fujitsu engagement, foundry plans, and a goal of bringing a competitive chip to market within 24 months. That was a forecast made in 2022, not evidence that the target was met.
A separate Nantero RFI response dated 2022 described a proposed 16 Gb DDR5 NRAM work package. It said Nantero was fabricating at 55 nm with Fujitsu in Japan and had achieved five-sigma quality on demonstration devices; it also proposed foundry work and engineering samples for evaluation. The document records the company’s reported status and proposal at that time. It does not verify that the proposed samples or later milestones were completed.
The earlier IEEE Spectrum headline, “Carbon Nanotube Memory Company’s Ship May Finally Come In”, captured an optimistic thesis, not a shipping announcement. Its outlook leaned on analysis from BCC Research and the Fujitsu licensing relationship. The 2024 product-status qualification is why that historical optimism should not be read as proof of a later launch.
Why moving from a demo to a product is difficult
Yield has to be good across the whole memory
Snowberger told EE Times that early NRAM work had “tail bits” that needed to be eliminated before the design could fit a direct processor or memory-module roadmap. He described a prior effort reaching two-sigma quality and later company-reported five-sigma results in the Fujitsu engagement. These are the CEO’s descriptions, not independently audited yield results. For a memory product, a strong individual cell is not enough: manufacturing must produce large arrays with acceptably few defective cells.
Nanotube control and fab integration matter
Carbon nanotube electronics face manufacturing challenges beyond the memory architecture itself. Chemical & Engineering News explains that nanotube electrical properties vary, precise placement is difficult, and stray nanotubes or catalyst metals can threaten fabrication processes. That article covers CNT electronics broadly; it provides context for scale-up challenges, not proof that every listed issue caused a specific NRAM failure.
IEEE Spectrum also identified nanotube purity and compatibility with conventional fab equipment as central hurdles. These concerns help explain why laboratory or macro results do not automatically translate into repeatable production on a semiconductor line.
Performance is only one part of product readiness
A buyer or system designer would also need a product specification, supply availability, manufacturing yield, compatible interfaces, and acceptable cost. The 2024 review emphasizes that production cost matters alongside device performance when a new memory is intended to displace established technologies. A fast cell or impressive retention estimate alone does not show that NRAM is ready to replace DRAM, flash, or another memory in a real system.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How to judge NRAM against other memory
NRAM should be compared with DRAM, flash, FRAM, MRAM, and other emerging memories on more than headline speed or retention. The practical questions are:
- Commercial readiness: Is there a listed product and volume supply, or only research, macro demonstrations, licenses, and proposed engineering samples?
- Retention and endurance: Are the numbers measured at cell level, extrapolated, or qualified as system specifications?
- Read and write performance: Are figures for a single cell or an array? NRAM’s reported 0.5 ns cell switching and 100–200 ns array-level speeds describe different things.
- Manufacturing compatibility and yield: Can the process control nanotube placement, purity, contamination, and defect rates at useful scale?
- System fit and cost: Does the memory meet an actual product’s interface, capacity, reliability, and cost requirements?
Is NRAM commercially available now?
The reviewed sources do not confirm whether Nantero or Fujitsu announced a commercial NRAM product, shipments, or newer development milestones after the 2024 review. As of October 5, 2026, commercial availability therefore remains unconfirmed in these sources. The defensible description is a technology with reported demonstrations and a commercialization effort—not a confirmed retail memory chip or module.
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