A thermal-driven floorplanning algorithm for 3D ICs

  • Authors:
  • J. Cong;Jie Wei;Yan Zhang

  • Affiliations:
  • Dept. of Comput. Sci., California Univ., Los Angeles, CA, USA;Dept. of Comput. Sci., California Univ., Los Angeles, CA, USA;Dept. of Comput. Sci., California Univ., Los Angeles, CA, USA

  • Venue:
  • Proceedings of the 2004 IEEE/ACM International conference on Computer-aided design
  • Year:
  • 2004

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Abstract

As the technology progresses, interconnect delays have become bottlenecks of chip performance. 3D integrated circuits are proposed as one way to address this problem. However, thermal problem is a critical challenge for 3D IC circuit design. We propose a thermal-driven 3D floorplanning algorithm. Our contributions include: (1) a new 3D floorplan representation, CBA and new interlayer local operations to more efficiently exploit the solution space; (2) an efficient thermal-driven 3D floorplanning algorithm with an integrated compact resistive network thermal model (CBA-T); (3) two fast thermal-driven 3D floorplanning algorithms using two different thermal models with different runtime and quality (CBA-T-Fast and CBA-T-Hybrid). Our experiments show that the proposed 3D floorplan algorithm with CBA representation can reduce the wirelength by 29% compared with a recent published result from (Hsiu et al., 2004). In addition, compared to a nonthermal-driven 3D floorplanning algorithm, the thermal-driven 3D floorplanning algorithm can reduce the maximum on-chip temperature by 56%.