Patent ID: 7284168

Claim:
Method of production testing a random access memory (RAM) redundant integrated circuit die fabricated on a wafer, said method comprising the steps of: at the wafer level, testing said RAM redundant integrated circuit die; identifying a failed element of the redundant RAM of said integrated circuit die; and replacing said failed element with a redundant element in the redundant RAM of said integrated circuit die; Thereafter, sectioning said tested die from the wafer; packaging said sectioned die in an integrated circuit package; at the package level, performing a test on said packaged integrated circuit die; identifying a failed element of the redundant RAM of said packaged integrated circuit die; and replacing said failed element with a redundant element in the redundant RAM of said packaged integrated circuit die; wherein this step comprises electrically blowing fuses in the redundant RAM of the packaged integrated circuit die to replace the failed element with a redundant element.