Polymer Inverter Fabricated by Inkjet Printing and Realized by Transistors Arrays on Flexible Substrates

We have fabricated organic thin-film transistors (OTFTs) and implemented inverters on flexible substrates using polythiophene (PHT) as the semiconductor and polyvinylphenol (PVP) as the gate dielectric. The semiconductor was defined by inkjet printing. The poor consistency of the printing process ha...

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Bibliographic Details
Published in:Journal of display technology 2009-06, Vol.5 (6), p.216-222
Main Authors: Hung-Chun Chen, Chen-Pang Kung, Wen-Gain Houng, Yu-Rung Peng, Yen-Min Hsien, Chun-Cheng Chou, Chi-Jen Kao, Tsung-Hua Yang, Hou, J.
Format: Article
Language:English
Subjects:
Arrays
Circuits
Dielectric substrates
Fabrication
Flexible substrate
Inkjet printing
Inverters
Nanoscale devices
Nanostructure
Organic thin film transistors
organic thin-film transistor (OTFT)
Oscillators
Polymers
Printing
Ring oscillators
Semiconductor devices
Semiconductors
Thin film transistors
Transistors
yield
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Summary:We have fabricated organic thin-film transistors (OTFTs) and implemented inverters on flexible substrates using polythiophene (PHT) as the semiconductor and polyvinylphenol (PVP) as the gate dielectric. The semiconductor was defined by inkjet printing. The poor consistency of the printing process has affected the uniformity of inkjet-printed OTFTs enormously. We also proposed a method to increase the yield by incorporating a pre-testing step during circuit fabrication. We designed and fabricated a basic unit of circuits called a thin-film transistor (TFT) array. These devices were then connected to each other to form a gate via printed nano-silver. To verify the implementation flow, we designed and measured bootstrap inverters and ring oscillator composed of them. The five-stage ring oscillator has been fabricated and oscillated at the frequency, 60 Hz, when the supply voltage is 40 V.
ISSN:1551-319X
1558-9323
DOI:10.1109/JDT.2009.2013873