On Tue, May 6, 2025 at 05:15 PM, John Woodgate wrote:
You get that from the foundry you plan to use to make your device.
That is true, and it's something I often remind people about.
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Sure you could grab some random "90nm" model file and play around with it, but don't use it to model any actual circuits that you plan on building.? When you build it, you need to know the model details from your FAB house.? They hold the recipe.? They set the process that determines how the transistors come out of the oven.? It won't be the same as those from another 90nm foundry.
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To be clear, Andy has found some contributed information, which is 5 years old.
Some of them were much older than that, going on 20 years now.? At some point in someone's distant past, those models worked for THEM with the ICs THEY were getting from some foundry which might not exist anymore.? When you go to build your ICs, you will need to get models for the 90nm FAB process you use.? Best to start with them instead of fooling yourself by borrowing someone else's model that does not represent today's reality.
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