3 ms·
Could you explain why not? Naively, having a much more dense process should allow automatic conversion. Going from 90nm to 16nm is 10x the density, that's a lot
by pedrocr 5y ago
Could you explain why not? Naively, having a much more dense process should allow automatic conversion. Going from 90nm to 16nm is 10x the density, that's a lot of margin for an automatic tool to use. Why doesn't that work?
- coryrc 5y agoIt's more than just a size change and there are features besides transistors. Say you have a 100 fF capacitor; is that because that's the right value based on an external constraint (say, interacting with a crystal) or because it's matching the inductance of a long internal path? Because you adjust them differently based on circumstance. And your transistors with a specific load must still supply the same current as before so they can't shrink as much as ones for internal logic. Also because the materials have changed the dialectic constant probably has and now the relative sizes of components need to adjust. And circuits are designed to minimize switching loss based on the old switching time and now they'll be wrong. Oh, and the breakdown voltage of the new process can't handle the voltage many of these old circuits use IIRC.