An Analysis of the Delay Defect Detection Capability of the ECR Test Method

  • Authors:
  • Seonki Kim;Sreejit Chakravarty;Bapiraju Vinnakota

  • Affiliations:
  • -;-;-

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

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Abstract

An analysis of the energy consumption ratio (ECR) testmethod, based on simulation study of resistive bridges andresistive opens, is presented. These defect classes comprisea very significant percentage of the defects causing speedfailures. We show: (i) bridges causing delay failures and detectable by the difference method is detected by theECR test method; and (ii) bridges and opens causing delayfailures but not detectable by the difference methodare also detected by the ECR test method. This highlightsa very significant advantage of the ECR test method overtest methods.The underlying reason as to why the ECR test methodis good at detecting delay defects is presented. Based onthat we develop a new test method called the ECR-VDDtest. The usefulness of the new method in detecting delaydefects is validated using simulation results.