What semiconductor are you planning to make that doesn't already exist (and already cheaper due to economies of scale than you can make it)?
There's a reason that whole countries prefer to 'buy-built' rather than 'build-their-own'. Ferinstance, China would prefer to buy ready-made chips from the USA than have to build their own semiconductor industry all the way up from scratch. But the US won't sell what the Chinese want to buy, so the Chinese will need to 'build-their-own' by throwing hundreds of billions of dollars at the task of doing so.
