When to get spef file

[wowlyy]

Hi, I'm trying to get SPEF for a thermal simulation. It seems that with SoC Encounter, I have to finish detailed routing then after RC extract, I can save SPEF. Can I get SPEF at earlier stage, such as after placement? If Encounter can't do that, is there any other tools can do that? What data is needed before I get SPEF and till when I can get SPEF?

Thank you!

 

[phoenixpavan]

Hi wowlyy,

I dont think you can extract SPEF earlier as to extract the parasitics information you need the layout details of the design..


cheers,

 

[wowlyy]

Thanks Phoenixpavan. My friend told me that the SPEF can be extracted after global routing, but I still can't do it with SoC Encounter. Is it true that we can get SPEF after global routing?

 

[phoenixpavan]

Yes..you can but less accurate