Comparison of Defect Detection Capabilities of Current-Based and Voltage-Based Test Methods

  • Authors:
  • Bram Kruseman

  • Affiliations:
  • -

  • Venue:
  • ETW '00 Proceedings of the IEEE European Test Workshop
  • Year:
  • 2000

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Abstract

The industrial default to test random logic is based on stuck-at fault test patterns applied via scan-chains. This test-method can be described as static voltage testing. A second well-known method is I DDQ testing, which can be described as static current testing. This second method is especially suited for detecting resistive shorts. For deep sub-micron technologies, new defect mechanisms start to become important. Especially, opens are a much-feared type of defect since static test methods are less suited to detect these defects. Dynamic test methods such as delay-fault testing and transient current testing could fill this gap in the test suite. The paper gives an overview of the aforementioned test-methods including some of the new current-based test methods necessary for deep submicron technologies and their defect detection capabilities.