W.-S. Lee, J.-S. Kang, N.-K. Tak, I.-C. Choi, J.-Y. Kim, J.-U. Han, J.-H. Choi, M. Mativenga, M.-G. Hwang, “P-22: Spice Model for Detection of Dynamic Threshold Voltage Shift During Failure Analysis of Oxide TFT-Based AMD Gate Drivers,” SID Symposium > Conference Papers

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We present an accelerated SmartSpice model that can detect dynamic threshold voltage shift (5Vth)-related failure of an oxide thin-film transistor (TFT)-based gate driver. Because oxide TFTs do not recover completely after application of stress (or when input is LOW), cumulative 5Vth that is induced during the HIGH of the input signal may result in failure of gate drivers. For correct failure analysis, a TFT model that can detect dynamic 5Vth is, therefore, needed for the replacement of the current TFT models that cannot account for dynamic 5Vth. The model presented herein works correctly with varying temperature and any input signal.