Transparent Current Mirrors With a-GIZO TFTs: Neural Modeling, Simulation and Fabrication

This paper characterizes transparent current mirrors with n-type amorphous gallium-indium-zinc-oxide (a-GIZO) thin-film transistors (TFTs). Two-TFT current mirrors with different mirroring ratios and a cascode topology are considered. A neural model is developed based on the measured data of the TFTs and is implemented in Verilog-A; then it is used to simulate the circuits with Cadence Virtuoso Spectre simulator. The simulation outcomes are validated with the fabricated circuit response. These results show that the neural network can model TFT accurately, as well as the current mirroring ability of the TFTs.

[1]  Pedro Barquinha,et al.  Toward High-Performance Amorphous GIZO TFTs , 2009 .

[2]  Kurt Hornik,et al.  Multilayer feedforward networks are universal approximators , 1989, Neural Networks.

[3]  Jun Huang,et al.  Performance and stability of amorphous InGaZnO thin film transistors with a designed device structure , 2011 .

[4]  E. Fortunato,et al.  Polymer light-emitting diodes with amorphous indium-zinc oxide anodes deposited at room temperature , 2009 .

[5]  Min-Koo Han,et al.  A Depletion-Mode In–Ga–Zn–O Thin-Film Transistor Shift Register Embedded With a Full-Swing Level Shifter , 2011, IEEE Transactions on Electron Devices.

[6]  Pedro Barquinha,et al.  Low‐temperature sputtered mixtures of high‐κ and high bandgap dielectrics for GIZO TFTs , 2010 .

[7]  P.B.L. Meijer.  Table models for device modelling , 1988, 1988., IEEE International Symposium on Circuits and Systems.

[8]  Junho Lee,et al.  58.2: Distinguished Paper: Implementation of 240Hz 55-inch Ultra Definition LCD Driven by a-IGZO Semiconductor TFT with Copper Signal Lines , 2012 .

[9]  E. Fortunato,et al.  Performance and Stability of Low Temperature Transparent Thin-Film Transistors Using Amorphous Multicomponent Dielectrics , 2009 .

[10]  E. Fortunato,et al.  Oxide Semiconductor Thin‐Film Transistors: A Review of Recent Advances , 2012 .

[11]  Pedro Barquinha,et al.  Insight on the SU-8 resist as passivation layer for transparent Ga2O3–In2O3–ZnO thin-film transistors , 2010 .

[12]  A. Nathan,et al.  Amorphous silicon back-plane electronics for OLED displays , 2004, IEEE Journal of Selected Topics in Quantum Electronics.

[13]  Jung Woo Kim,et al.  Bottom-Gate Gallium Indium Zinc Oxide Thin-Film Transistor Array for High-Resolution AMOLED Display , 2008, IEEE Electron Device Letters.

[14]  Sanjiv Sambandan,et al.  Analogue circuit building blocks with amorphous silicon thin film transistors , 2005 .

[15]  Michiel Steyaert,et al.  A Fully Integrated $\Delta \Sigma$ ADC in Organic Thin-Film Transistor Technology on Flexible Plastic Foil , 2011, IEEE Journal of Solid-State Circuits.

[16]  Zeljko Mrcarica,et al.  MOS transistor modelling using neural network , 1992 .