You get information from your fab (libraries about sizes of things so you
can do layouts and simulation with very expensive software (https://www.synopsys.com) (fun exercise, try to get a price on their website...)
Often you send your design to the fab to get some samples to test back.
Wikipedia has a decent summary about how the chips are made
The chipmaking process starts with code. Veralog I think is still being used. https://en.wikipedia.org/wiki/Verilog
You get information from your fab (libraries about sizes of things so you can do layouts and simulation with very expensive software (https://www.synopsys.com) (fun exercise, try to get a price on their website...)
Often you send your design to the fab to get some samples to test back.
Wikipedia has a decent summary about how the chips are made
https://en.wikipedia.org/wiki/Semiconductor_device_fabricati...