Resistive-Open Defects in Address Decoders

Abstract

This chapter targets the study of dynamic faults that affect the address decoders of SRAMs, in particular ADOFs (Address Decoder Open Faults) and resistive-ADOFs that are caused by intra-gate pure open and resistive-open defects. Experiments show that resistive-ADOFs, which are a generalization of ADOFs, require more stringent timing constraints for their sensitization. Several algorithmic solutions are effective to test these faults. These so-lutions are mainly based on the ‘Sachdev’s pattern.’ One of these test solutions consists in a compact 2 N March test that can be em-bedded in existing March tests, without modifying their complexity and their capability to cover the former target faults. A meaningful example of a modified test algorithm covering ADOFs is March iC-, which is an improved version of March C-.