4 ms·
so if I can summarize -- what we think of as a logical transistor starts to have all sorts of physical properties, some dictated by the material, the physical l
by x0x0 5y ago
so if I can summarize -- what we think of as a logical transistor starts to have all sorts of physical properties, some dictated by the material, the physical layout, and probably what's near it. Designers spend piles of time simulating this, and a process change requires that work to be redone.
Thanks again!
- mih 5y agoYou got it right. Translating from a logical design to a physical design requires following rules laid out by a foundry for a given process node (5nm, 7nm etc.). To check if a physical layout confirms to a node, Design Rule Checking [1] is performed as part of the Physical Verification step in EDA [2]. The simulation/checking is highly complex and takes hours (sometimes days) even with sufficient parallelization. Once a design passes the checks, it is deemed ready for manufacture by the foundry. [1] https://en.wikipedia.org/wiki/Design_rule_checking https://en.wikipedia.org/wiki/Design_rule_checking [2] https://en.wikipedia.org/wiki/Electronic_design_automation#Analysis_and_verification https://en.wikipedia.org/wiki/Electronic_design_automation#A...
- x0x0 5y agoty!