A flexible pressure-sensitive array based on soft substrate

A 4 × 4 flexible pressure-sensitive array based on PET/ITO (polyethylene terephthalate/indium tin oxides) was designed and fabricated, with a size of 2.5 cm × 2.5 cm × 0.75 mm. The design effectively reduces the complexity of device structure. The array shows giant negative pressure coefficient of resistivity (NPCR) effect under 0-4 N (0-0.32 M Pa). The pressure-sensitive array exhibits high sensitivity and fast response-recovery to loads. And the response and recovery times are less than 2 s. The sensitive size and azimuth of the applied loading on the pressure-sensitivity array can be accurately recognized easily. The pressure-sensitivity array is stable, low-cost and easy for fabricating large-area sensors. The designed micro array may be used for in robot skin.