Patent ID: 11900586
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 14:
15. A method for detecting hot spot defects, adapted to an electronic apparatus, the method comprising:
acquiring a plurality of defect images obtained by an inspection tool performing hot scans on a wafer manufactured with a design, and training a machine learning model for classifying the defects from the nuisances with the defect images to evaluate optimal filters for detecting the hot spot defects; and
acquiring a plurality of defect images obtained by the inspection tool performing hot scans on the wafer in runtime and aligning a hot spot map comprising a plurality of hot spot groups extracted from the design to each of the defect images to locate the hot spot groups in each defect image;
for each of the defect images, dynamically mapping each of the hot spot groups located in the respective defect image to one of a plurality of threshold regions; and
for each of the threshold regions, applying the optimal filters to the pixel values of the hot spots of each hot spot group, and determining at least a detection threshold based on noise levels of the pixels of each hot spot group in the respective threshold region, and determining the pixels having the pixel values deviating from the detection threshold as the hot spot defect.