Patent ID: 7962302

Claim:
A method for estimating a quality of one or more wafers, the method comprising: testing one or more first wafers comprising one or more first dies; determining a probability of wafer failure in accordance with one or more first test measurements of the one or more first dies; and inferring at least one of a pass status and a fail status of one or more second wafers by testing a select one or more second dies of the one or more second wafers and evaluating one or more second test measurements of the select one or more second dies in accordance with the determined probability of wafer failure; wherein said evaluating comprises (i) determining if each of the select one or more second dies of a given second wafer pass based on the one or more second test measurements; and (ii) even if each of the select one or more second dies of the given second wafer pass based on the one or more second test measurements, inferring whether the given second wafer has failed based on the determined probability of wafer failure.