Margin calibration method and margin calibration system for static timing analysis

A margin calibration system for static timing analysis, the margin calibration system comprising:

• a memory configured to store a plurality of computer-executable instructions;
• and
• a processor electrically coupled to the memory, wherein the processor is configured to retrieve and execute the computer-executable instructions to perform:
• measuring performance on a plurality of dies on a to-be-tested chip with a target circuit to obtain a plurality of performance data records of critical paths of the plurality of dies;
• obtaining a plurality of simulation data records for simulating performances of the plurality of dies, respectively;
• executing a static timing analysis (STA) tool to perform static timing analysis on the target circuit according to the simulation data records, for obtaining a plurality of timing analysis results corresponding to the critical paths of the plurality of dies;
• statistically calculating an average of the plurality of timing analysis results;
• obtaining an average of the plurality of performance data records;
• establishing a statistical model that defines a margin based on a difference between the average of the plurality of performance data records and the average of the plurality of timing analysis results;
• substituting the plurality of timing analysis results and the average of the plurality of performance data records into the statistical model and execute a model fitting algorithm, for fitting the statistical model to a target model for obtaining the margin, wherein the target model defines a first function and a second function that are equal, the first function being a function of the average of the plurality of performance data records, and the second function being a function of the timing analysis result;
• and
• executing the STA tool to perform static timing analysis on the target circuit according to the plurality of simulation data records and the margin, so as to obtain a plurality of calibrated timing analysis results corresponding to the plurality of dies.