Patent Document ID: 20020082796
Application ID: 09742224
Patent Flag: 0

Claim One:
1. A method for determining failure rate and selecting a best burn-in time, comprising: providing a plurality of integrate circuits; performing a life-time testing process, wherein a failure rate testing time relation is established by measuring the life-time of each said integrated circuit under a testing environment, wherein an acceleration factor function also is established under said testing environment, said acceleration factor function being related to the relationship between a testing time of said testing environment and a real time of a normal operating environment; performing a simulating process, using a testing time function to simulate said failure rate testing time relation; performing a transforming process, using said acceleration factor function to transform said testing time function into a real time function, wherein a knee point of said real time function corresponds to an operation time which is said best burn-in time; and performing an integrating process, integrating said real time function through a calculating region to consult an accumulated failure rate real time function, wherein said calculating region is a region in which said real time is larger than said best burn-in time.