RDL pre-assignment routing for flip-chip designs

  • Authors:
  • Jin-Tai Yan;Zhi-Wei Chen

  • Affiliations:
  • Chung-Hua University, Hsinchu, Taiwan Roc;Chung-Hua University, Hsinchu, Taiwan Roc

  • Venue:
  • Proceedings of the 19th ACM Great Lakes symposium on VLSI
  • Year:
  • 2009

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Abstract

Based on the concept of net renumbering and recovery to simplify the complexity of the global and detailed routing, an efficient RDL pre-assignment routing algorithm is proposed to maximize the number of routed nets with the minimization of total wirelength under the crossing and capacitance constraints for a flip-chip design. Compared with the combination of the single-layer BGA global router[6] and our detailed routing, our RDL pre-assignment router reduces the global wirelength by 12.8% after global routing and improve the routability by 14.7% after detailed routing on the average for some tested circuits in reasonable CPU time.