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

Claim 7:
8. An electronic device, comprising:
at least one processor;
a storage device, configured to store one or more programs;
wherein when the one or more programs are executed by the at least one processor, the at least one processor is configured to:
obtain defect data of a wafer;
obtain position data of fail bits of the wafer;
determine a defect area of a storage block in the wafer according to the defect data;
determine a fail bit count of the storage block in the wafer according to the position data of the fail bits;
process the defect area and the fail bit count of the storage block in the wafer to obtain a correlation coefficient; and
determine an abnormal reason for the fail bits of the wafer according to the correlation coefficient;
wherein the processor is further configured to:
determine a defect affected region of the wafer according to the defect data;
determine a defect area index of the storage block in the wafer according to a ratio of the defect area of the storage block in the wafer to an area of the defect affected region;
determine a fail bit index of the storage block in the wafer according to a ratio of the fail bit count of the storage block in the wafer to the area of the defect affected region; and
perform correlation analysis on the defect area index and the corresponding fail bit index of the storage block in the wafer to obtain the correlation coefficient.