How to keep specific Net Wires Spacing out with other net wires

Hi,

you need to create a non-default routing rule for the nets with add_ndr command, use the -spacing or -spacing_multiplier switch to set the required spacing.
Check out this article for some examples:
How to query, create, apply and remove Non-Default Rule (NDR) for routing in Innovus ?

-Dimo

Hi Dimo

Thank you for your reply.

I have used NDR in my Design .but it‘s only work on Nets that between I have created NDR.

e.g

set NDR_net_list {net_a net_b}

create_route_rule -name default_2x_space -spacing {metal1:metal4 0.2 metal5:metal6 0.4 metal7 0.6}

set_route_attributes -nets $NDR_net_list  -route_rule $default_2x_space

Its only work on  net_a and net_b, but will not work on between net_* and other Nets in Design.

so Could you tell me how to keep Spacing between $NDR_net_list and other Nets in Design ?

Hi,

in my understanding the rule should work independently of what the other net is.

According to the tool command reference, the default behaviour is to try to apply the NDRs opportunistically, if the space allows. Does your design have enough routing resources ?

You can change this behavior with
set_db route_design_strict_honor_route_rule true

If this does not work out, you can also try the following:
set_route_attributes -nets $NDR_net_list  -route_rule $default_2x_space -route_rule_effort hard

-Dimo

Hi DimoM

It's worked, Thank you very much