Flexible Bioelectronics: Sensors and Substrates

This lecture by the instructor covers the design considerations for flexible bioelectronics, the human skin structure, body movement proprioception, stress and strain in the skin, mechanical response, mechanoreceptors, and the role of temperature and chemical reactions. It also discusses the main substrate types, such as glass, metal foils, and polymer substrates, as well as the desired properties for a flexible substrate. The lecture delves into the fabrication of polyimide substrates, the use of thin metal films for sensors, and the effect of strain on electrical resistance. It concludes with the characterization of resistive strain gauges and the importance of further characterization in the field of flexible bioelectronics.