Patent ID: 11954615
Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 17:
18. An apparatus for improving at least one of quality and yield of a physical process, the apparatus comprising:
a memory; and
at least one processor coupled to the memory, the processor being operative:
to obtain values, from respective performances of the physical process, for a plurality of variables associated with the physical process;
to determine at least one Gaussian mixture model (GMM) representing the values for the plurality of variables for the performances of the physical process;
based at least in part on the at least one Gaussian mixture model, to compute at least one anomaly score for at least one of the variables for at least one of the performances of the physical process;
based on the at least one anomaly score for the at least one of the variables exceeding a given threshold, to identify the at least one of the performances of the physical process as an outlier;
to trigger, in response to the at least one anomaly score for the at least one of the variables exceeding the given threshold, a modification of the at least one of the variables for one or more subsequent performances of the physical process so as to improve the at least one of quality and yield of the physical process, wherein the physical process comprises at least a portion of a semiconductor manufacturing process; and
to control a fabrication of facilitate at least one semiconductor device using the semiconductor manufacturing process in accordance with the modified at least one of the variables.