Interconnect characteristics of 2.5-D system integration scheme

  • Authors:
  • Yangdong Deng;Wojciech P. Maly

  • Affiliations:
  • Department of Electrical and Computer Engineering, Carnegie Mellon University, 5000 Forbes Ave., Pittsburgh, PA;Department of Electrical and Computer Engineering, Carnegie Mellon University, 5000 Forbes Ave., Pittsburgh, PA

  • Venue:
  • Proceedings of the 2001 international symposium on Physical design
  • Year:
  • 2001

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Abstract

Growing number of excessively long on-chip wires in modern monolithic ICs is a byproduct of growing chip size. To address this problem instead of placing all systems components in one layer (i.e. in 2-D space) one can use a stack of single layer monolithic ICs (called here a 2.5-D integrated IC). To assess the potential benefits of such a 2.5-D integration schema this paper compares wire length distributions, obtained for 2-D and 2.5-D implementations of benchmark circuits. In the assessment two newly developed floorplanning and placement tools were used. Significant reductions in both total wirelength and worst-case wirelength was observed for the systems implemented as 2.5-D ICs.