IBM Journal of Research and Development
IBM Skip to main content
  Home     Products & services     Support & downloads     My account  

  Select a country  
Journals Home  
  Systems Journal  
Journal of Research
and Development
    Current Issue  
    Recent Issues  
    Papers in Progress  
    Search/Index  
    Orders  
    Description  
    Patents  
    Recent publications  
    Author's Guide  
  Staff  
  Contact Us  
  Related links:  
     IBM Research  

IBM Journal of Research and Development  
Volume 28, Number 5, Page 613 (1984)
Design Automation
  Full article: arrowPDF   arrowCopyright info





   

An iterative-improvement penalty-function-driven wire routing system

by R. Linsker
A wire routing system (VIKING) has been developed for interconnection packages. It uses iterative-improvement methods that allow "illegalities" (such as wire crossings within a plane) at intermediate stages of the routing, eliminates some drawbacks of conventional sequential routers, and extends the range of penalty functions with respect to which a wiring configuration can be optimized. Efficient routing in directionally uncommitted planes is provided; specification of preferred-direction (x and y) planes is optional but not required. Significant reductions in required manual embedding effort, number of vias required, routed wire length, and the number of signal planes required to wire a package, have been found, compared with sequential routers that have been used. Improved automatic control of electrical crosstalk noise has also been provided. In addition to presenting VIKING methods and results, we discuss other issues relating to wiring methods and global optimization. Application of these methods to chip design is also discussed.
Related Subjects: Design automation; Integrated circuits; LSI