Process Variations and their Impact on Circuit Operation

  • Authors:
  • Suriyaprakash Natarajan;Melvin A. Breuer;Sandeep K. Gupta

  • Affiliations:
  • -;-;-

  • Venue:
  • DFT '98 Proceedings of the 13th International Symposium on Defect and Fault-Tolerance in VLSI Systems
  • Year:
  • 1998

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Abstract

The statistical variations in electrical parameters, such as transistor gain factors and interconnect resistances, due to variations in the manufacturing process are studied using data obtained from a 0.8 micron CMOS process. The impact of these variations and correlations on circuit operation is illustrated. Examples show that circuit delay can increase from the mean by about 100% due to crosstalk effects aggravated by process variations. Case studies emphasize the need for a tighter coupling between fabrication and circuit design and the need for new design corners based on process information.