Effects of AC frequency on the capacitance measurement of hybrid response pressure sensors† Zhengjie Li, a Kyoung-Ho Ha,b Zheliang Wang,a Sangjun Kim,b Ben Davis,b Ruojun Lu,b Jayant Sirohi a and Nanshu Lu*abcd Abstract E-skins consisting of soft pressure sensors are enabling technology for soft robots, bio-integrated devices, and deformable touch panels. A well-known bottleneck of capacitive pressure sensors (CPS) is the drastic decay in sensitivity with increasing pressure.