With the advancement in technology and lower operating voltage, new standards have evolved in circuit layout and design. Some of these new standards have increased the difficulties of the physical failure analysis process, especially on the front-end. The phenomenon described in this paper is the unusual voltage contrast (VC) and conductive atomic force microscope (C-AFM) curve on a non-isolated active region. The model and mechanism are demonstrated for front-end failure analysis. Based on this, the solution for analysis is investigated.

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