Chip Talk > Breaking the Speed Barrier: China's Revolutionary Picosecond Flash Memory Unveiled
Published May 02, 2025
Recent advancements in semiconductor technology by a Chinese research team from Fudan University have ushered in a groundbreaking flash memory device. Utilizing innovative concepts such as a quasi-2D Poisson model, this device promises unprecedented speed enhancements, ushering the world into an era of ultra-high-speed data storage.
Read the full details on Trendforce.
The new flash memory, termed "PoX," operates on the principles of super-injection, a groundbreaking phenomenon theoretically predicted by the research team. Through the combination of a Dirac energy band structure and the ballistic transport properties of two-dimensional materials, this technology promises speed capabilities never seen before in semiconductor memory.
By overcoming traditional barriers caused by electron acceleration limits, PoX flash memory achieves read/write speeds at the sub-1-nanosecond level. Specifically, its speed clocks in at 400 picoseconds, or 2.5 billion operations per second, marking it as the fastest charge-storage technology globally.
Traditional flash memory devices rely on the floating-gate transistor, which involves a source, drain, and gate mechanism to store information. Previous strategies to enhance speed involved "warming up" electrons to flow from source to drain with increased energy.
The Fudan University team, however, tackled this limitation differently. By modulating the Gaussian length and utilizing two-dimensional channels, they enabled super-injection, allowing electrons to accelerate without a cumbersome "run-up" distance. This innovation effectively removes the historic critical point limitation, paving the way for continuous, rapid data storage.
The advent of PoX flash memory promises significant implications across various fields such as AI, cloud computing, and communication engineering. This could lead to transformative changes in how memory architectures are structured, potentially phasing out the necessity for separate memory and storage layers in systems.
For the AI industry, where data processing speed is a foundational pillar, the introduction of such high-speed storage could open new avenues for large AI models to operate locally without traditional hierarchical storage constraints.
The Chinese team intends to scale this innovation for larger integrations, targeting tens of megabits within the next 3 to 5 years—with plans to license for industrial use. Such scalability could catalyze exponential growth in related technology sectors, positioning China as a leader in the next wave of tech revolutions.
As we stand on the brink of a new technological era, PoX flash memory developments encapsulate the spirit of innovation that can drive future industry standards. Should this technology achieve commercial viability, its influence could surpass current semiconductor capabilities, radically transforming data storage and processing methodologies across industries.
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