With no prior experience? 0%. Those machines are not just like printers :-)

We'll have to gain some experience then :)

	▲	danparsonson an hour ago \| parent [-]
		Sure - once you have dozens of engineers and 5 years under your belt you'll be good to go! This will get you started: https://youtu.be/B2482h_TNwg Keep in mind that every wafer makes multiple trips around the fab, and on each trip it visits multiple machines. Broadly, one trip lays down one layer, and you may need 80-100 layers (although I guess DRAM will be fewer). Each layer must be aligned to nanometer precision with previous layers, otherwise the wafer is junk. Then as others have said, once you finish the wafer, you still need to slice it, test the dies, and then package them. Plus all the other stuff.... You'll need billions in investment, not millions - good luck!

▲

vel0city an hour ago | parent | prev [-]

Especially when the plan is to just run them in a random rented commercial warehouse.

I drive by a large fab most days of the week. A few breweries I like are down the street from a few small boutique fabs. I got to play with some experimental fab equipment in college. These aren't just some quickly thrown together spaces in any random warehouse.

And it's also ignoring the water manufacturing process, and having the right supply chain to receive and handle these ultra clean discs without introducing lots of gunk into your space.