what is the mail difference between basic captables and extended captables?
I've opend captables file and I observed the basic tables and I understood.
But on what basis the Extended captables were generated?
Basic Capacitance Table - Provides a table of spacing versus capacitance information for each layer.
Extended Capacitance Table - Provides encoded extraction patterns that are derived using a 3D field solver which provides much greater accuracy during detailed extraction.
you based on what we'l get the extended captables?
I mean to get capacitance values in 3D field we should have routed design but we have not yet routed our design, then how can we have extended caps in captables?
I thought if we are working on a design which is having 1million gate count we might have used the captables of already routed design which is having approximately 1million gate count.
Please Explain in detail.
Foundries will typically provide the cap table for the specific process. If you need to generate the captable, create an ICT file and use the generateCapTbl command.