Oxide Electronics Transferred on Stiff-Stripe/PDMS Substrate for High-Resolution Stretchable Displays

We report flexible oxide semiconductor-based electronics transferred on polydimethylsiloxane (PDMS) elastomer substrate in the form of stiff stripes for stretchable displays. Stiff stripes with optimized geometries are placed between PDMS substrate and oxide electronics to provide strong adhesion and mechanical protection. Amorphous indium-gallium-zinc oxide (a-IGZO) thin-film transistors (TFTs) and gate driver circuits on polyimide substrate are cut into identical stripe shape and transferred onto the stiff region. The turn-on voltage (VON) and mobility of the fabricated a-IGZO TFTs vary within ±0.4 V and 7.4%, respectively, after 50% stretching and relaxation for 1000 cycles. The circuits on the stiff-stripe/elastomer substrate can be repeatedly stretched to 50% without mechanical and electrical degradations. The results can be used for practical stretchable displays with high resolution over a large area.