Re: extract RC
You can perform two types of extraction in Encounter:
Native RC ExtractionUsed to provide quick parasitic extraction (default mode) for design prototyping, or to generate more accurate parasitics (detailed mode) for cross-coupling and signal integrityanalysis.
Sign-Off RC Extraction using Fire & Ice® QX
Used to obtain the most accurate detailed parasitic extraction. Fire & Ice can also beused with native extraction to generate RC scaling factors.
Native (Default) Used during optimization both before and after clock
tree synthesis.
Native (Detailed) Used during post-route optimization.
Sign-Off (Fire & Ice) Used during chip assembly and timing sign-off
processes.
Hope it Helps.