Application 2. Graphene enabled flexible touch sensor.
Task 4.1. Design and specifications of the flexible touch sensor. (Μ13-Μ18) [NTUA, GRAPHENEA, BIU, MELLANOX]
In this Task, NTUA will set all the specifications and the requirements (>90% transparency, pf sensitivity, response time <1ms, bending radius <1 cm etc.) of the flexible organic sensor components and of the final device. The function of the touch sensor will rely on either resistive or capacitive sensing. Based on the specifications/requirements, NTUA will design the corresponding layout of the device and the specific LDT process to be employed for its fabrication. The receiving substrates which will be considered will be either polymeric (e.g. PEN, PET) or malleable glass.
Task 4.2. Fabrication of the touch sensor by LDT of single layer Graphene. (M18-M36) [NTUA, SOUTHAMPTON, MELLANOX]
In this Task NTUA will employ the optimized LIFT process (T2.2, T2.3) using the metal/dielectric donor carriers developed by GRAPHENEA (T1.2) for the high resolution transfer of Graphene pixels on flexible substrates. At a first phase arrays of Graphene sensing electrodes will be fabricated on bare flexible substrates (D4.1, MS9) and at a second phase, the laser fabricated sensing layer will be integrated with commercially available driving electronic layer, constituting the Graphene touch sensor prototype (D4.2).
Task 4.3. Morphological, electrical and system level evaluation characterization. (M25-M36) [NTUA, MELLANOX]
The touch sensor layers, which will be fabricated at the first phase of Task 4.2, will be fully characterized morphologically (SEM, AFM) and electrically (I-V, CV, strain gauge resistance measurements) by NTUA. The stability of the Graphene touch sensor will be validated through 100 cycle runs with a 0 -100 kPa applied pressures. The touch sensor prototype will be tested and evaluated as stand-alone device by MELLANOX. (D4.2)