Figure 5.

(a) Pressure mapping with a 2 × 2 flexible array of 2 × 2 mm² sensors on Kapton film showing the size (top) and flexibility when bent (bottom). Reprinted with permission from Ref. [65], Copyright (2014), Springer Nature; (b) Animal experiment using feline model. (Top) A flexible, high-density active electrode array was placed on the visual cortex. Inset, the same electrode array was inserted into the interhemispheric fissure; (Bottom left) Folded electrode array before insertion into the interhemispheric fissure; (Bottom right) Flat electrode array inserted into the interhemispheric fissure. Reprinted with permission from Ref. [69], Copyright (2011), Springer Nature; (c) The National Chiao Tung University (NCTU) probe was bonded onto two different types of PCB. Type A assembly was used for chronic recording, and Type B was used for acute recording in free-moving animals. Reprinted with permission from Ref. [66], Copyright (2009), Elsevier; (d) Assembled polyimide/SU-8 catheter-tip microelectromechanical (MEMS) gauge pressure sensor in comparison with a commercial Millar Mikro-Cath™ disposable pressure catheter. Reprinted with permission from Ref. [94], Copyright (2012), Springer Nature.