Patent ID: 7403864

Claim:
A system for wafer correlation, wherein a correlation wafer is tested and its testing results are compared to its previously-determined reference data, the system comprising: a database operable to store testing instructions for testing the correlation wafer and correlation criteria for comparing the testing results with the previously-determined reference data; an instruction-server module operable to identify, at the database, the testing instructions and the correlation criteria and to transmit the testing instructions and correlation criteria; a testing-control module operable to receive the testing instructions and correlation criteria from the instruction-server module and to output electrical signals according to the testing instructions; and a prober operable to test the correlation wafer according to the electrical signals; wherein the testing-control module is operable to apply the correlation criteria and to transmit correlation data to the instruction-server module, wherein the correlation data comprise a count of matching and non-matching dice, and wherein the instruction-server module is further operable to apply a statistical model to the correlation data to generate new testing instructions, the new testing instructions stored in the database.