Stretchable electronics for ambient applications F. Bossuyt, T. Vervust, F. Axisa, J. Vanfleteren Functional flexible islands connected with stretchable interconnections embedded in a stretchable polymer Carrier removal Bottom moulding CMST - Ghent University – Technologiepark 914A, 9052 Zwijnaarde [email protected] Polyimide supported islands Polyimide supported meanders Smooth flex-stretch transitions Sensors, actuators,.. Smooth polymer shapes Completely moulded in polymer PCB manufacturing steps on carrier Process overview Stretchable electronics technology overview Stretchable copper meanders Demonstrators Stretchable LED- matrix Philips Activity monitor Technology characteristics & highlights PCB-manufacturing steps on rigid board till moulding Testing and repairing capability before moulding Breathability possible by moulding Washable 2500 times stretchable @ 10% Copper (9µm - 18µm – 35µm - 70µm) 20 µm polyimide meander- and flexible island support Meander density: 5 lines/cm Min. line width: 100 µm Reflow soldering (SAC), Adhesives Polymer type: PDMS Thickness of base polymer: >200 µm Size of sheet processing: 10 cm x 10 cm Standard SMD components Applications Smart textiles Intelligent bandages Drug delivery systems Artificial organs Strain absorbing systems Robotic skins Large area sensor arrays Ambient actuators Conformable lighting www.stella-project.de Inductive link Verhaert Babymonitor LED-band Temperature sensors Top moulding Polyimide patterning Copper sheet