Flexible Oxide Thin-Film Transistor Active Matrix for Bi-Directional Bio-Interface
Abstract
A flexible bi-directional bio-interface design using indium zinc oxide (IZO) thin-film transistors (TFTs) to share the same microelectrode array and electrical interconnects is proposed for direct electrical stimulation (DES) and bio-potential signals sensing. The oxide TFTs present a high current driving capability (mA level) for stimulation and a high ON-OFF ratio (>109) for switching with good uniformity. An active-matrix pixel design is developed to provide higher stimulation current and also enable the fabricated microelectrode array to be highly robust and tolerant to customizable cutting for various wearable applications. Finally, a bio-interface system is built based on the flexible microelectrode array for electrocardiograph (ECG) and electromyography (EMG) tests on a mouse.
Fields of Study & Subjects
Advanced Sensor and Energy Harvesting Materials
Neuroscience and Neural Engineering
Thin-Film Transistor Technologies
Publication details
- Journal / source
- IEEE Electron Device Letters
- Publisher
- Institute of Electrical and Electronics Engineers (IEEE)
- Volume
- 47
- Issue
- 3
- Pages
- 534–537
- Publication date
- 3 February 2026