Crosstalk‐Free, Stretching‐Insensitive Sensor Based on Arch‐Bridge Architecture for Tactile Mapping with Parallel Addressing Strategy toward Million‐Scale‐Pixels Processing

Abstract

Abstract In the field of biomimetic electronics, flexible sensors with both high resolution and large size are attracting a lot of attention. However, attempts to increase the number of sensor pixels have been thwarted by the need for complex inner circuits and the resulting interferences with the output. Technological challenges, such as real‐time spatiotemporal mapping and long‐time reliability, must be resolved for large‐scale sensor matrices. This paper reports a simple and robust sensor with an arch‐bridge architecture (ABA) to address these challenges. The device, which consists of an anti‐icing all‐transparent material system, is fabricated by immobilizing ABA ionic arrays on predefined grooves on the substrate. It systematically integrates ABA structure‐designing, resistance‐position‐sensing, and parallel‐addressing logic, allowing for an improvement of three orders of magnitude in the scanning speed (million‐scale pixels) without logical “diagnose confusion.” In addition, it can withstand 100 000 stretching cycles without functional failure. It is also resistant to interferences from stretching. humidity, wet surfaces, and power lines. The proposed strategy is envisaged to serve as a general solution for high‐density, large‐area tactile sensors in various applications.

Keywords

• large‐scale touch‐sensing
• parallel addressing
• strain‐insensitivity
• tactile mapping
• touchpad