Built in self repair for embedded high density SRAM

  • Authors:
  • Ilyoung Kim;Yervant Zorian;Goh Komoriya;Hai Pham;Frank P. Higgins;Jim L. Lewandowski

  • Affiliations:
  • -;-;-;-;-;-

  • Venue:
  • ITC '98 Proceedings of the 1998 IEEE International Test Conference
  • Year:
  • 1998

Quantified Score

Hi-index 0.00

Visualization

Abstract

As the density of embedded memory increases,manufacturing yields of integrated circuits canreach unacceptable limits. Normal memory testingoperations require Built-In Self Test (BIST)to effectively deal with problems such as limitedaccess and "at speed" testing. In this paper wedescribe a novel methodology that extends theBIST concept to diagnosis and repair utilizingredundant components. We describe an applicationusing redundant columns and accompanyingalgorithms. It allows for the autonomousrepair of defective circuitry without externalstimulus (e.g. laser repair). The method has beenimplemented with negligible timing penaltiesand reasonable area overhead.