Patent ID: 9209167
Filing Date: 2015-12-08
Classification: G06F,H01L

Abstract:
1. A method comprising: testing multiple test chips and, during said testing, taking measurements from multiple field effect transistors on said multiple test chips, said multiple field effect transistor having different channel widths; accessing, by a processor from a memory, information regarding said multiple field effect transistors having said different effective channel widths, defining, by said processor and based on said information, a relation between a standard deviation of an uncorrelated threshold voltage variation associated with said multiple field effect transistors and a difference between said first average threshold voltage associated with said first field effect transistor and said second average threshold voltage associated with said second field effect transistor, said defining of said relation comprising determining said standard deviation of said uncorrelated threshold voltage variation based on a sub-threshold slope value, on said difference between said first average threshold voltage and said second average threshold voltage, and on said ratio of said second effective channel width w