Neural interfaces are crucial to restoring and enhancing impaired neural functions, but current technologies struggle to achieve close contact with soft and curved neural tissues. According to Pusan National University, researchers have introduced an innovative method – microelectrothermoforming (μETF) – to create flexible neural interfaces with 3D micro-structures. Their findings show how this method improves neural recording and stimulation, with potential applications in artificial retina devices and brain-computer interfaces.

Microelectrode arrays (MEAs) are widely used for recording brain activity and stimulating neural tissues. However, conventional MEAs are typically flat – limiting their ability to conform to the natural curves of neural structures. Existing methods for adding 3D features require multiple fabrication steps – increasing complexity and restricting design possibilities.

To overcome these limitations, a team led by Associate Professor Joonsoo Jeong and Associate Professor Kyungsik Eom developed μETF – inspired by plastic thermoforming, a common technique for molding plastic sheets into different shapes. The findings are published in the journal of npj Flexible Electronics.