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constraint region

masamasa
masamasa over 5 years ago

hello

i have a problem with the constraint region setting.

I set one region as l/s=50/50um and the other as l/s=10/10um as shown below

but when i connect the two clines over the two regions, the l/s=50/50um constraint takes over on region b as shown below.

is there a way to keep the l/s=50/50um constraint on region a and the l/s=10/10um constraint on region b over one net cline?

i set the physical and the spacing on the constraint manager as shown below. 

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  • RFinley
    RFinley over 5 years ago

    From here, it looks like you defined two constraint regions but they don't touch or overlap.  Outside the region, global netclass constraints take over.

    I believe it is intended to have a sub-region of the board where you have to drop to 0.07mm instead of 1mm to fan out a device.   Maybe you only need one region?

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  • RFinley
    RFinley over 5 years ago

    From here, it looks like you defined two constraint regions but they don't touch or overlap.  Outside the region, global netclass constraints take over.

    I believe it is intended to have a sub-region of the board where you have to drop to 0.07mm instead of 1mm to fan out a device.   Maybe you only need one region?

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  • masamasa
    masamasa over 5 years ago in reply to RFinley

    thank you for your reply.

    the two regions do not touch.

    even if they touch each other, they situation is the same as shown below.

      

    how can i create a sub region?

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