The stress analysis of IGZO TFT in structures, dielectrics, and rolling curvatures using finite element method is proposed. The inverted-coplanar with SiOx has the smallest stress for mechanical rolling. The local extreme stress would also induce film cracks or peeling at the corner. For example, inverted-coplanar structure has the maximum stress at the corner of IGZO/Al with -0.65 GPa (x-direction stress), -0.22 GPa (y-direction stress), and -0.21 GPa (shear stress). The stress of IGZO TFT with high PPI under mechanical rolling is also discussed.
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