Extraction and simulation of realistic CMOS faults using inductive fault analysis

  • Authors:
  • F. Joel Ferguson;John P. Shen

  • Affiliations:
  • Computer Engineering, University of California at Santa Cruz, Santa Cruz, CA;Electrical and Computer Engineering, Carnegie Mellon University, Pittsburgh, PA

  • Venue:
  • ITC'88 Proceedings of the 1988 international conference on Test: new frontiers in testing
  • Year:
  • 1988

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Abstract

Inductive Fault Analysis (IFA) is a systematic method for determining what faults are likely to occur in a VLSI circuit. It takes into account the circuit's technology, fabrication defect statistics and physical layout. This "inductive" approach of characterizing faults, by drawing conclusions based on analyzing the particulars of low-level fault-inducing mechanisms, departs from the traditional approach of simply assuming a convenient high-level fault model. FXT is a software tool which implements Inductive Fault Analysis for CMOS circuits. It extracts a comprehensive list of circuit-level faults for any given CMOS circuit and ranks them according to their relative likelihood of occurrence. Five commercial CMOS circuits are analyzed using FXT. Of the extracted faults, approximately 50% can be modeled by the single line stuck-at 0/1 fault model. Faults extracted from two circuits are simulated with the switch-level fault simulator FMOSSIM. The test set provided by the circuits' manufacturer, which detects 100% of the single line stuck-at 0/1 faults, detected between 73% and 89% of the simulated faults.