Patent ID: 11927544
Assignee: CHANGXIN MEMORY TECHNOLOGIES, INC.
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 6:
7. The method according to claim 5, wherein determining the abnormal reason according to the manufacturing process information corresponding to the structure layer information where the defect data is located comprises:
determining a count of defects that do not cause the fail bits in the wafer according to the defect data and the position data of the fail bits;
determining a defect cleaned rate of the wafer according to a ratio of the count of the defects that do not cause the fail bits in the wafer to a total defect count in the defect data;
evaluating the defect cleaned rate of the wafer according to an empirical rule; and
in a case where an evaluation result is abnormal, determining a step including a cleaning abnormal function in the manufacturing process information as the abnormal reason.