期刊
IEEE ELECTRON DEVICE LETTERS
卷 37, 期 4, 页码 445-448出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LED.2016.2529183
关键词
Depletion load nMOS; inkjet printing; metal oxide; thin-film transistor
资金
- European Union through the POINTS Project [263042]
- Horizon Programme through the ROLL-OUT Project [H2020/2014-2020, 644631]
Ability to digitally control the amount of a deposited material is one of the many advantages of inkjet printing. In this letter, we demonstrate the applicability of inkjet printing for the fabrication of depletion-load nMOS inverters based on metal oxide thin-film-transistors (TFTs) from printed metal oxide precursors where the threshold voltage of the TFTs is controlled by adjusting the thickness of the deposited semiconductor layer. Enhancement-and depletion-mode n-type In2O3 TFTs were fabricated from In-nitrate precursor using two printing strategies: 1) multilayer multinozzle printing and 2) single-layer single-nozzle printing in perpendicular or parallel to the TFT channel. TFTs with saturation mobility up to similar to 2.4 cm(2)/(V . s) and the ON/OFF-ratio of 10(7) were obtained after annealing at 300 degrees C. Devices connected as depletion-load nMOS inverters showed gain up to similar to 26 on a Si/SiO2 substrate, and an inverter on a flexible polyimide substrate with atomic layer deposited Al2O3 dielectric was demonstrated with a maximum gain of similar to 45.
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