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The case study is focus on one of the assembly defect which is invisible during 1st level for analysis. Root-cause finding involved assessment until die level analysis.
This paper highlights systematic fault isolation approaches to identify back-end of line metal bridging through the combination of techniques such as photon emission, soft defect localization, laser voltage probing as well as combinational logic analysis, to successfully pin point a single metal layer for physical failure analysis, thus boosting the overall success rate and turnaround time.
Photon Emission Microscopy is the most widely used mainstream defect isolation technique in failure analysis labs. It is easy to perform and has a fast turnaround time for results. However, interpreting a photon emission micrograph to postulate the suspected defect site accurately is challenging when there are multiple abnormal hotspots and driving nets involved. This is commonly encountered in dynamic...
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