Patent ID: 11971365
Assignee: GLOBALWAFERS CO., LTD.
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A wafer processing system, comprising:
an image capture device, capturing an image of a wafer to generate a captured image;
a processing device; and
a control device, coupled to the image capture device and the processing device, and the control device is configured to:
detect a defect pattern in the captured image,
determine a contrast value reduction amount according to a required upper limit of sum of scratch lengths of the defect pattern and a distribution of scratch lengths and contrast values of the defect pattern, wherein sum of scratch lengths of scratches having contrast value higher than value of the contrast value reduction amount is lower than the required upper limit,
identify a contrast value change amount of a standard wafer after removing a unit removal thickness of the standard wafer,
calculate a target removal thickness according to the contrast value reduction amount, the contrast value change amount and the unit removal thickness, and
control the processing device to perform a processing on the wafer according to the target removal thickness.