A Novel Dry Blending Method to Reduce Coefficient of Thermal Expansion of Polymer Template for OTFT Electrodes Alignment

  1. Xiangdong YeORCID Logo,
  2. Bo Tian and
  3. Yuxuan Guo

Submitting author affiliation: Xi’an University of Architecture and Technology, Xi’an, China

Beilstein Arch. 2019, 2019156. https://doi.org/10.3762/bxiv.2019.156.v1

Published 12 Dec 2019

  • Preprint


Among patterning technologies for organic thin-film transistors (OTFT), the fabrication of OTFT electrodes using polymer template has attracted much attention. However, deviations in electrodes alignment occur owing to a much higher coefficient of thermal expansion (CTE) of the polymer template than the CTE of the dielectric layer. Here, a novel dry blending method is described in which SiO2 nanoparticles are filled into a grooved silicon template, following by permeation of polydimethylsiloxane (PDMS) into the SiO2 nanoparticle gaps. The SiO2 nanoparticles in the groove are extracted by curing and peeling off PDMS to prepare a PDMS/SiO2 composite template with a nanoparticle content of 83.8 wt%. The composite template has a CTE of 96 ppm/°C, which a reduction of 69.23%, compared with the original PDMS template. Finally, we achieved the OTFT electrodes alignment by the composite template.

Keywords: PDMS/SiO2 composite template; dry blending; coefficient of thermal expansion; OTFT electrodes

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Ye, X.; Tian, B.; Guo, Y. Beilstein Arch. 2019, 2019156. doi:10.3762/bxiv.2019.156.v1

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