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D2.2 Development of IMHyPE and thermoforming - 1 - FULL PAPER
Deliverable 2.2 exposes advances related to WP2 – T2.3 – Plastic processing. It entails a description of the tests obtained for thermoforming and/or over-moulding of selected substrates for demonstrators and active components as antennas and organic photodetectors (OPD) printed with innovative materials developed within MADRAS’ project.
Regarding antennas, firstly compatibility of injected polymers like thermoplastics polyurethane (TPU) with nanocellulose foils (NCF) has been analysed. Secondly, redesign of the antennas by simulation has been carried out, considering the presence of a TPU layer of different thickness over the printed UHF and UWB antennas.
Regarding fingerprint sensor, the different comprising parts of the demo have been addressed separately: substrate, TFT and OPD. Firstly, a first design for thermoforming and injection mould tool for the demo has been drawn. The mould is designed to be compliant, since the very first stage of the project, with the final motorbike-selected part integration.
Secondly, thermoforming tests on the PI/TPU/PC stack has been carried out. These initial set of experiments has enabled to test the resistance of the stack of substrate materials to the shape of demo 2 mould. Moreover, TFT test structures platform has been designed for testing thermoforming parameters stepwise: pressure and temperature limits, thermoforming of TFT and TFT/OPD full stack.
Finally, initial experiments on plastic injection on OPD are presented with the aim of setting up a platform that enables to study the stability of OPD constituent materials (photoactive layers, charge transport layers, electrodes and encapsulant materials) to injection processes and film/injected polymer compatibility.
The partners participating in this task are EUT, TNO, INF, UWL and AWCP. The document entails the work carried out from month 8 to month 15.