Artificial Synaptic Device can Simulates the Function of Human Brain

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The device can be utilised in the development of artificial intelligence (AI) and brain-like semiconductors

Researchers from the Intelligent Devices and Systems Research Group at DGIST has succeeded in developing an artificial synaptic device. It mimics the function of the nerve cells (neurons) and synapses that are responsible for memory in human brains.

It is expected to be applied to the next-generation intelligent semiconductor device technologies such as the development of artificial intelligence (AI) including machine learning and deep learning and brain-mimicking semiconductors.

Can transfer information just like human brain synapses

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This chemical synapse the information transfer system which transfers information from the brain and can handle parallel arithmetic with little energy. They developed an artificial synaptic device with multiple values by structuring tantalum oxide into two layers of Ta2O5-x and TaO2-x and by controlling its surface.

This electrical synaptic device simulates the function of synapses in the brain as the resistance of the tantalum oxide layer gradually increases or decreases depending on the strength of the electric signals. It has succeeded in overcoming the durability limitations of current devices by allowing current control only on one layer of Ta2O5-x.

Device can suppress or strengthen the memory

In addition, the research team implemented an experiment that realised synapse plasticity. It is the process of creating, storing and deleting memories, such as the long-term strengthening of memory and long-term suppression of memory by adjusting the strength of the synapse connection between neurons.

The multiple-value data storage method applied by the research team reduced the circuit connection complexity and power consumption by more than one-thousandth compared to data storage methods based on digital signals using 0 and 1 such as volatile CMOS (Complementary Metal Oxide Semiconductor). Well, the researchers will contribute to the development of AI based on the neuromorphic system that mimics the human brain by creating a circuit that imitates the function of neurons.

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