dorsaVi Confirms RRAM Memory Survives 150°C Heat With Zero Permanent Damage
dorsaVi’s RRAM technology proves its mettle at 150°C
dorsaVi Limited (ASX: DVL) has completed a high-temperature evaluation of its RRAM technology, demonstrating predictable and fully reversible cell behaviour at operating temperatures up to 150°C, tested against AEC-Q100 automotive-grade requirements. The evaluation confirmed zero permanent thermal degradation, a meaningful step in the company’s commercialisation program that validates RRAM for real-world heat-exposed hardware across robotics, exoskeletons, autonomous systems, and industrial equipment.
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What the testing showed — and why it matters
How the temperature testing was structured
The evaluation employed a symmetrical thermal profile, testing incrementally at room temperature, 85°C, 105°C, 125°C, and 150°C, before cooling back through the same checkpoints to assess reversibility. Rather than relying on a single data point, the methodology used multi-point read current assessment, measuring representative read-current checkpoints across the full resistance window at each thermal step. This approach provided a more complete picture of temperature-dependent read-margin behaviour and a stronger basis for calibrating future commercial chip designs, with all test conditions aligned to the AEC-Q100 automotive-grade reliability standard.
The evaluation confirmed three outcomes:
- Predictable read margins: Resistance window shifts were temporary and predictable, with lower-resistance and higher-resistance state regions responding differently to temperature in a measurable, calibratable manner.
- Zero thermal degradation: Full baseline performance recovered upon cooling, confirming heat caused no permanent physical damage or structural wear to the RRAM cells.
- Flawless physical alignment: Device response matched established memory physics with no unexpected anomalies, proving temperature effects can be predicted, measured, and calibrated.
What is RRAM and why does thermal stability matter?
Resistive Random-Access Memory (RRAM) is a non-charge-based memory technology that stores data by switching between two resistance states: a low-resistance state (LRS) and a high-resistance state (HRS). Unlike conventional flash memory, which stores data as electrical charge and is inherently vulnerable to charge leakage under sustained heat, RRAM’s resistance-based storage mechanism offers a different resilience profile in thermally demanding environments. Temperature-dependent behaviour in RRAM is a known characteristic of its underlying electronic and ionic transport mechanisms, meaning it is expected physics. The significance of this evaluation is confirming that those shifts are reversible and calibratable, not damaging to the cells themselves.
The pathway to temperature-aware chip design
The predictable thermal response identified in this evaluation creates a pathway for temperature-aware voltage optimisation in future chip designs. Read thresholds, write voltages, and pulse widths may be adjusted dynamically according to operating temperature, potentially reducing unnecessary electrical overdrive and lowering energy consumption without sacrificing reliable switching and read-margin performance. This is an architectural design capability made possible by the predictability of the thermal response rather than a feature already implemented, but the evaluation has confirmed the underlying foundation is sound.
Mathew Regan, Group Chief Executive Officer
“Demonstrating reliable RRAM operation at 150°C is a significant step in our commercialisation program. It confirms the technology is built for the environments our target applications actually operate in, and it opens up design approaches that were not available with conventional memory. We are pleased with the progress and remain focused on advancing the platform toward tape-out.”
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High-value applications now within reach
The thermal validation directly addresses one of the more demanding challenges in hardware deployment: operating reliably in sealed, uncooled environments where compute components sit in close proximity to high-heat sources. Exoskeletons and robotics represent the most immediate addressable opportunity, given that compute in these systems is typically co-located with high-heat joint motors, actuators, and high-discharge batteries. Autonomous systems and industrial equipment extend the addressable market further, where sustained operational temperatures in uncontrolled environments are a design constraint that memory technology must accommodate.
The use of AEC-Q100 test methodology also establishes a credential pathway for automotive and industrial deployment, though it is the methodology that has been applied here, not a certification achieved.
| Application Sector | Thermal Challenge | Why RRAM Stability Matters | Relevant Standard/Context |
|---|---|---|---|
| Exoskeletons | Compute sits adjacent to high-heat joint motors and high-discharge batteries in sealed, uncooled enclosures | Confirms memory can operate continuously without thermal degradation in proximity to heat sources | AEC-Q100 test methodology applied |
| Robotics | Actuator-generated heat and limited thermal dissipation in compact form factors | Reversible, predictable thermal behaviour enables reliable read/write performance across operating cycles | AEC-Q100 test methodology applied |
| Autonomous systems | Sustained high-temperature operation in variable and uncontrolled environments | Validated calibratable response supports consistent memory performance without design overengineering | AEC-Q100 test methodology applied |
| Industrial equipment | Prolonged exposure to elevated ambient temperatures across operational lifespans | Zero permanent degradation at 150°C confirms longevity for embedded memory in industrial hardware | AEC-Q100 test methodology applied |
Management’s stated focus remains on advancing the RRAM platform toward tape-out, the stage at which a chip design is finalised and submitted for fabrication. This evaluation represents a technical milestone within that broader commercialisation program, with the confirmed thermal performance expanding the range of deployment environments the platform is positioned to address.
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