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

Claim 15:
16. A plating tool, comprising:
an optical inspection system configured to:
obtain an image of a wafer including a group of wafer bumps;
binarize the image of the wafer based on a value associated with a brightness or intensity of illumination of each wafer bump of the group of wafer bumps; and
perform, based on binarizing the image of the wafer, a defect analysis associated with detecting a region of the wafer in which one or more wafer bumps satisfies a threshold height,
the defect analysis to be performed prior to a photoresist stripping process being performed on the wafer, and
wherein, to perform the defect analysis, the optical inspection system is configured to:
identify, based on the group of wafer bumps, an open angular section,
 the open angular section being an angular section of a portion of the wafer in which the group of wafer bumps is 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.