- Enabling high densities needed for discrete chips using standard materials and tools
- Selector technology also suitable for the embedded market, a significant step forward for edge AI and automotive applications
- Greatly increases the number of possible applications for Weebit Nano’s technology
The new Weebit ReRAM selector was manufactured in CEA-Leti’s R&D fab, and the silicon wafers were thoroughly tested for both programming and leakage currents. The results from this internal testing showed that the ratio between programming current and leakage current was at industry standard, signifying high on-state and low leakage current.
In a memory array, the role of a selector is to ensure that only the specific cells which should be accessed actually are, and all other cells are disconnected and not impacted. Embedded designs currently use a transistor as the selector device, but transistors increase the cell area of a memory bit and therefore cannot support the high densities required for discrete chips. In addition, future embedded applications such as edge AI and automotive will require far larger memory arrays and could benefit from an optimized selector that enables higher densities.
Developing cost-efficient selectors using only standard materials and tools is a significant challenge, but it has the potential to further minimize manufacturing cost and complexity. While additional development is still required, this new selector technology could be easily integrated into any CMOS fab, potentially enabling the high-capacity memory arrays needed while keeping size and power to a minimum.
“In addition, we’re breaking down a barrier by making it possible to use the same selector for both discrete and embedded applications. This is an important step forward on our roadmap for discrete products and is a compelling value proposition for companies developing advanced SoCs for applications like edge AI, which need a reliable, cost-effective replacement for embedded flash.
“Ongoing selector development will be carried out in parallel to rolling out our embedded technology to mass production.”
Approved for release by the Board of
About
Weebit’s ReRAM allows semiconductor memory elements to be significantly faster, less expensive, more reliable and more energy efficient than those using existing Flash memory solutions. As it is based on fab-friendly materials, the technology can be quickly and easily integrated with existing flows and processes, without the need for special equipment or large investments.
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