Poster Sessions

2024 KPS Spring Meeting

Wednesday-Friday, November 4-6, 2020; Virtual Conference
Session P1-ap.4: Organic electronics and photonics
1:00 PM-1:50 PM, Thursday, November 05, 2020
Room:
Chair:
Abstract: P1-ap.411* : development of a single device-based organic tactile synapse for artificial learning skin applications
Presenter:
Jang Seonghoon
(KU-KIST Graduate School of Converging Science and Technology, Korea University)

Author:
JANG Seonghoon 1, LEE Kyuho 2, KIM KangLib 2, KOO Min 2, PARK Chanho 2, LEE Seokyeong 2, LEE Junseok 2, PARK Cheolmin 2, WANG Gunuk *1
(1KU-KIST Graduate School of Converging Science and Technology, Korea University, 2Department of Materials Science and Engineering, Yonsei University)
Recently, research on wearable intelligent electronics that detects, remembers, and learns external stimuli in real-time is receiving great interest. And a tactile synaptic device studies have emerged because they have the potential for human-interactive neuromorphic applications capable of large-scale parallel processing. However, the artificial tactile synaptic devices reported so far have complex physical connections between the sensor unit and the memory unit, which are inevitably not suitable for the wearable and patchable device due to the complex and costly manufacturing steps. Here, we demonstrate an artificial orgnic tactile synaptic device based on the integrated single device that enables the sensing, storing, and learning of a variety of tactile information. The synaptic device is able to be programmed with various tactile input pressures, by using a ferroelectric field-effect transistor structure with a pressure-sensitive ball-shaped top gate electrode. The synaptic device reliably and stably operates with high tactile reception sensitivity of 88 KPa-1 under bending conditions. And it was confirmed that synaptic plasticity was stably implemented for 10,000 inputs by various electrical/tactile stimuli, which allows for precise and robust tactile perception learning. Furthermore, we demonstrated that an integrated 4 x 4 tactile synaptic array allows for 2-dimensional tactile learning and proof-of-concept recognition simulations for diverse handwriting patterns with an outstanding error tolerance. As a result, This study proposes the novel platform for a single, integrated tactile neuromorphic system, which can simultaneously sense and learn a variety of external information.

Keyword:
organic tactile synapse, wearable neuromorphic system
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