[cpleppert]

It doesn’t make economic sense to build basically an entire new supply chain though.

You can’t just build a modern foundry with any amount of money. TSMC is part of a massive supply chain and engineering cluster. If you wanted to build something that looked like TSMC and in an emergency could produce something in six months you are probably talking about tens of billions per year at a minimum. Most of your costs are things TSMC gets paid for.

Since that doesnt really make sense you probably want a homegrown competitor. You just don’t have the domestic experience and expertise to replicate what TSMC has; It will never be cost competitive. TSMC can send billions on fabs and recover their costs and a domestic alternative will never be able to. Modern chips have to be adapted to each foundry; a homegrown alternative will have to eat this cost at first just to get orders.

If you want to be competitive you need to go big and stay there. Something like $100 billion a year for the foreseeable future would be the minimum. You could probably limp along with massive discounts.