SemiWiki

Advancing Automotive Memory: Development of an 8nm 128Mb Embedded STT-MRAM with Sub-Ppm Reliability

Researchers have demonstrated an 8 nm, 128 Mb embedded STT‑MRAM designed for automotive applications, achieving sub‑parts‑per‑million failure rates across the –40 °C to 150 °C temperature range. The cell area was aggressively scaled to 0.017 µm², while process refinements reduced short‑fail defects and enhanced MTJ stack thermal tolerance, widening read margins. Optimizations of the pinned‑layer and spin‑transfer torque efficiency delivered write error rates and retention errors below ppm levels without sacrificing speed, enabling 8 ns read operations. This milestone proves that high‑density memory can meet the stringent reliability standards required for advanced driver‑assistance and infotainment systems.