Full-Swing InGaZnO Thin Film Transistor Inverter with Depletion Load

A high performance amorphous indium–gallium–zinc oxide (a-IGZO) thin film transistor (TFT) inverter is implemented using the enhancement mode driver and the depletion mode load. The threshold voltage of the TFT is easily controlled by adjusting the active layer thickness in a-IGZO TFTs. The proposed inverter shows much improved switching characteristics including higher voltage gain, wider swing range, and higher noise margins compared to the conventional inverter with an enhancement load.

[1]  Pedro Barquinha,et al.  The role of source and drain material in the performance of GIZO based thin‐film transistors , 2008 .

[2]  Pedro Barquinha,et al.  Influence of the semiconductor thickness on the electrical properties of transparent TFTs based on indium zinc oxide , 2006 .

[3]  Masatoshi Kitamura,et al.  High field-effect mobility amorphous InGaZnO transistors with aluminum electrodes , 2008 .

[4]  H. Ohta,et al.  Room-temperature fabrication of transparent flexible thin-film transistors using amorphous oxide semiconductors , 2004, Nature.

[5]  H. Mizuta,et al.  Improved off-current and subthreshold slope in aggressively scaled poly-Si TFTs with a single grain boundary in the channel , 2004, IEEE Transactions on Electron Devices.

[6]  Yeon-Gon Mo,et al.  Control of threshold voltage in ZnO-based oxide thin film transistors , 2008 .

[7]  H. Ohta,et al.  Amorphous Oxide Semiconductors for High-Performance Flexible Thin-Film Transistors , 2006 .

[8]  Dong Hun Kim,et al.  Thickness Dependence of Gate Dielectric and Active Semiconductor on InGaZnO4 TFT Fabricated on Plastic Substrates , 2008 .

[9]  Changjung Kim,et al.  High-performance amorphous gallium indium zinc oxide thin-film transistors through N2O plasma passivation , 2008 .

[10]  Hyun-Joong Chung,et al.  Bulk-Limited Current Conduction in Amorphous InGaZnO Thin Films , 2008 .

[11]  Randy Hoffman,et al.  Transparent ring oscillator based on indium gallium oxide thin-film transistors , 2006 .