Print Email Facebook Twitter Towards a Microfabricated Flexible Graphene-Based Active Implant for Tissue Monitoring During Optogenetic Spinal Cord Stimulation Title Towards a Microfabricated Flexible Graphene-Based Active Implant for Tissue Monitoring During Optogenetic Spinal Cord Stimulation Author Velea, Andrada (Student TU Delft) Vollebregt, S. (TU Delft Electronic Components, Technology and Materials) Giagka, Vasiliki (TU Delft Bio-Electronics) Date 2019 Abstract Our aim is to develop a smart neural interface with transparent electrodes to allow for electrical monitoring of the site of interest during optogenetic stimulation of the spinal cord. In this work, we present the microfabrication process for the wafer-level development of such a compact, active, transparent and flexible implant. The transparent, passive array of electrodes and tracks have been developed using graphene, on top of which chips have been bonded using flip-chip bonding techniques. To provide high flexibility, soft encapsulation, using polydimethylsiloxane (PDMS) has been used. Preliminary measurements after the bonding process have shown resistance values in the range of kΩ for the combined tracks and ball-bonds. To reference this document use: http://resolver.tudelft.nl/uuid:a15a2662-2707-44f8-82f5-9de8f5c569b5 Page numbers 218-219 Event 2019 IEEE 14th Nanotechnology Materials and Devices Conference (NMDC), 2019-10-27 → 2019-10-30, Stockholm, Sweden, Stockholm, Sweden Part of collection Institutional Repository Document type abstract Rights © 2019 Andrada Velea, S. Vollebregt, Vasiliki Giagka Files PDF 1570569666.pdf 599.03 KB Close viewer /islandora/object/uuid:a15a2662-2707-44f8-82f5-9de8f5c569b5/datastream/OBJ/view