BCIwiki (bciwiki.com) — Advanced Healthcare Materials published a review on 2026-10-25 in which researchers at Qingdao University, China, examined fabrication strategies and performance optimization for flexible brain-computer interface (BCI) electrodes. The article addresses neural signal characteristics, electrode requirements, and challenges in large-scale manufacturing, long-term stability, and clinical translation.
Electrodes record and modulate neural signals, and their performance affects signal quality, spatial resolution, and long-term stability. The review notes that mechanical mismatch between traditional rigid electrodes and brain tissue may cause tissue damage and reduce recording stability during long-term implantation. Flexible electrodes offer better mechanical compatibility, but electrical, mechanical, and biological performance must still be considered together.
The major fabrication approaches covered include microelectromechanical systems (MEMS), printing and transfer, laser processing and thermal drawing, and electrospinning. Deposition and surface modification are discussed separately as functional enhancement strategies, distinguishing device fabrication from subsequent performance modification.
The authors also examine the physical and clinical limitations of invasive, semi-invasive, and non-invasive electrodes. Intelligent, wireless, and self-powered systems, together with clinical translation, are discussed as future directions. These are assessments of research progress and prospective developments, not evidence that such systems have completed clinical validation or resolved long-term use challenges.