Industrial Evaluation of Stress Combinations for March Tests applied to SRAMs

  • Authors:
  • Ivo Schanstra;Ad J. van de Goor

  • Affiliations:
  • -;-

  • Venue:
  • ITC '99 Proceedings of the 1999 IEEE International Test Conference
  • Year:
  • 1999

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Abstract

This paper presents the results of ten well-known memorytest algorithms and four memory test primitives applied to3876 256Kbit SRAM chips, using 128 different stresscombinations with each test algorithm. The results showthat stress combinations influence the coverage of the testalgorithms for these SRAMs, and that the influence is lessfor these SRAMs than for DRAMs. Selecting the rightstress combination allows for using a simpler algorithm.The simple memory test primitives can detect all faultsgiven the proper stresses. Power supply voltage turns outto be a very important non-algorithmic stress.