Computer-Aided Fault to Defect Mapping (CAFDM) for Defect Diagnosis

  • Authors:
  • Zoran Stanojevic;Hari Balachandran;D. M. H. Walker;Fred Lakhani;Sri Jandhyala;Jayashree Saxena;Kenneth M. Butler

  • Affiliations:
  • -;-;-;-;-;-;-

  • Venue:
  • ITC '00 Proceedings of the 2000 IEEE International Test Conference
  • Year:
  • 2000

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Abstract

Defectdiagnosisinrandomlogiciscurrentlydoneusingthestuck-atfaultmodel, whilemostdefectsseeninmanufacturing result in bridging faults. In this work we usephysical design and test failure information combined withbridgingandstuck-atfaultmodelstolocalizedefectsinrandom logic. We term this approach computer-aided faulttodefectmapping(CAFDM).Webuildontopoftheexistingmaturestuck-atdiagnosisinfrastructure.TheperformanceoftheCAFDMsoftwarewastestedbyinjecting bridging faults into samples of astreaming audiocontrollerchipandcomparingthepredicteddefectlocationsandlayerswiththeactualvalues.Thecorrectdefect location and layer was predicted in all 9 samples forwhichscan-baseddiagnosiscouldbeperformed.Theexperiment was repeated on production samples that failedscan test, with promising results.