REDO - Probabilistic Excitation and Deterministic Observation - First Commercial Experiment

  • Authors:
  • Michael R. Grimaila;Sooryong Lee;Jennifer Dworak;Kenneth M. Butler;Bret Stewart;Hari Balachandran;Bryan Houchins;Vineet Mathur;Jaehong Park;Li-C. Wang;M. Ray Mercer

  • Affiliations:
  • -;-;-;-;-;-;-;-;-;-;-

  • Venue:
  • VTS '99 Proceedings of the 1999 17TH IEEE VLSI Test Symposium
  • Year:
  • 1999

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Abstract

For many years, non-target detection experiments have been simulated by using AND/OR bridges or gross delay faults as surrogates. For example, the defective part level can be estimated based upon surrogate detection when test patterns target stuck-at faults in the circuit. For the first time, test pattern generation techniques that attempt to maximize non-target defect detection have been used to test a real, 100% scanned, commercial chip consisting of 75K logic gates. In this experiment, the defective part level for REDO-based patterns was 1,288 parts per million lower than that achieved by DC stuck-at based patterns generated using today's state of the art tools and techniques.