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Thin-film transistor circuits on large-area spherical surfaces

Hsu, P. I. and Bhattacharya, R. and Gleskova, H. and Huang, M. and Xi, Z. and Suo, Z. and Wagner, S. and Sturm, J. C. (2002) Thin-film transistor circuits on large-area spherical surfaces. Applied Physics Letters, 81 (9). pp. 1723-1725. ISSN 0003-6951

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Abstract

We report amorphous silicon (a-Si:H) thin-film transistors (TFTs) fabricated on a planar foil substrate, which is then permanently deformed to a spherical dome, where they are interconnected to inverter circuits. This dome subtends as much as 66° ( ∼ 1 sr) with the tensile strain reaching a maximum value of ∼ 6% on its top. Functional TFTs are obtained if design rules are followed to make stiff TFT islands of limited size on compliant substrates. Photoresist patterns for island interconnects are made on the flat structure, are plastically deformed during the shaping of the dome, and then serve to delineate interconnects deposited after deformation by lift-off. We describe the effect of deformation on the TFTs before and after deformation and the performance of TFT inverter circuits. Our results demonstrate that the concept of stiff circuit islands fabricated on deformable foil substrates is a promising approach to electronics on surfaces with arbitrary shapes.

Item type: Article
ID code: 38119
Keywords: thin-film transistor, circuits, spherical surfaces, Electrical engineering. Electronics Nuclear engineering, Physics and Astronomy (miscellaneous)
Subjects: Technology > Electrical engineering. Electronics Nuclear engineering
Department: Faculty of Engineering > Electronic and Electrical Engineering
Related URLs:
Depositing user: Pure Administrator
Date Deposited: 02 Mar 2012 14:06
Last modified: 06 May 2014 16:33
URI: http://strathprints.strath.ac.uk/id/eprint/38119

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