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    Combinational optical rule check on hotspot detection

    White Paper


    The Calibre OPCverify tool can use additional limiters such as max intensity, contrast, and NILS checks in combination with normal CD-based checks such as bridge, pinch, or process window bands to achieve higher accuracy in failure locations.

    Finding the true on-product hot spots (patterning defects) by high volume manufacturing inspection tools is increasingly challenging. Using optical rule checks is common, but may not be good enough. We propose a method of using addition limiters to achieve higher accuracy.

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