Patent ID: 7831409

Claim:
A method for yield similarity of semiconductor devices, the method comprising: providing a first plurality of semiconductor devices and a second plurality of semiconductor devices; obtaining a first plurality of yields associated with a first yield related to the first plurality of semiconductor devices; obtaining a second plurality of yields associated with a second yield related to the second plurality of semiconductor devices; providing a processor; performing a first statistical analysis for the first plurality of yields using at least the processor; determining a first statistical distribution based on at least information associated with the first statistical analysis; performing a second statistical analysis for the second plurality of yields; determining a second statistical distribution based on at least information associated with the second statistical analysis; determining an indicator based on at least information associated with the first statistical distribution and the second statistical distribution, the indicator being associated with an overlapping area between the first statistical distribution and the second statistical distribution; determining a confidence level based on at least information associated with the indicator, the confidence level being associated with a second order of the indicator and a first order of the indicator; determining whether the first yield and the second yield are similar based on at least the confidence level, the determining whether the first yield and the second yield are similar includes: if the confidence level is equal to or higher than a predetermined level, determining the first yield and the second yield to be similar; if the confidence level is lower than the predetermined level, determining the first yield and the second yield to be not similar.