Patent ID: 11954841
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 9:
10. An optical inspection system, comprising:
a camera configured to generate an image of a wafer; and
an image analysis device configured to:
binarize the image based on a value associated with a brightness or intensity of illumination of each wafer bump of one or more wafer bumps of the wafer, and
perform a defect analysis for the one or more wafer bumps based on binarizing the image,
wherein, to perform the defect analysis, the image analysis device is configured to:
identify, based on the one or more wafer bumps, an open angular section,
 the open angular section being an angular section of a portion of the wafer in which the one or more wafer bumps are not present,
calculate an angle associated with the open angular section, and
determine whether the angle associated with the open angular section satisfies an open angle threshold.