A method to differentiate Gate-to-S/D Gate Oxide Short from non-Gate Oxide Short defect in real products by analyzing the I-V curves acquired by Conducting-Atomic Force Microscopy (C-AFM) is presented. The method allows not only the correct short path to be identified, but also allows differentiation of gate-to-S/D GOS from non-GOS problems, which cannot be reached by passive voltage contrast (PVC) only.

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