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Typical Overflow ?

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Hi,

I just wonder how much is the typical horizontal and vertical overflow so that the design be routable. I think this should depend on the number of metal layers in the design, I am using 6 metal layers in my design.

Thanks,

Houman



Originally posted in cdnusers.org by houmanh
Parents

  • If you can solve all your routing congestion issues with trialroute -medium Effort (the default ) ot better still -low Effort, then nanoroute is going to have a much easier time of it.

    I have seen cases where trial route -high Effort reported reasonable congestion numbers but nanoroute would never complete cleanly.

    Also get used to looking at the GCell overflow display under "all colors" > "view only" this is the absolute worst case congestion scenario, every single Gcell overflow is shown..

    AND as Eng Han pointed out "it is always good to run a nanoroute early"

    Shawn


    Originally posted in cdnusers.org by shawn
Reply

  • If you can solve all your routing congestion issues with trialroute -medium Effort (the default ) ot better still -low Effort, then nanoroute is going to have a much easier time of it.

    I have seen cases where trial route -high Effort reported reasonable congestion numbers but nanoroute would never complete cleanly.

    Also get used to looking at the GCell overflow display under "all colors" > "view only" this is the absolute worst case congestion scenario, every single Gcell overflow is shown..

    AND as Eng Han pointed out "it is always good to run a nanoroute early"

    Shawn


    Originally posted in cdnusers.org by shawn
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