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Self-Aligned Carbon Nanotube Thin-Film Transistors on Flexible Substrates With Novel Source–Drain Contact and Multilayer Metal Interconnection

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5 Author(s)
Pham, D.T. ; Dept. of Electr. & Comput. Eng., Univ. of Texas at Austin, Austin, TX, USA ; Subbaraman, H. ; Chen, M.Y. ; Xiaochuan Xu
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This paper presents the development and characterization of self-aligned carbon nanotube thin-film transistors (CNT-TFT) on flexible substrates. The channel consisting of dense, aligned, 99% pure semiconducting single-walled CNT is deposited using the dip-coat technique on a sacrificial substrate and then transferred on the device substrate. The source, drain, and gate structures are formed by the ink-jet printing technique. A novel source-drain contact formation using wet droplet of silver ink prior to the CNT thin-film application has been developed to enhance source-drain contact with the CNT channel. Bending test data on CNT-TFT test structures show minimal change (less than 10%) in their performance. Moreover, a special multilayer metal interconnection technology is demonstrated for flexible electronics applications. Bending test data on via test structure show change in resistance by less than 5%.

Published in:

Nanotechnology, IEEE Transactions on  (Volume:11 ,  Issue: 1 )

Date of Publication:

Jan. 2012

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