I think that's actually an excellent comparison!
Heh, thanks, at least I got some part of the perspective right! When I've joined threads about these topics I quickly find how much I'm out of my league!
Don't forget that a company like FujiFILM is called that ('film') because they're so darn good at making thin layers of stuff. And making thin layers with great consistency and great quality is actually pretty darn challenging to. It just happens that photographic film is exactly that - very thin layers, with very good consistency. Fuji built a multi-billion corporation on that trick. It took them more than a handful of PhD's and a year's worth of R&D to get there.
Ironically, to take from my CPU manufacturing comparison that put the difficulty in perspective, if they're being hand-coated that presumes they're being coated individually or in batches; and in the semiconductor industry, when they want to apply a very thin, even layer of photoresist, they use spincoating. It also speeds up drying, too. Not sure whether it would scale for film, but I wonder if people have done that for hand-coating emulsions? Videos, guides, etc I see about hand-coating emulsions usually seem to involve flowing the emulsion and letting it dry like back in the late 1800s with dry plates.
I always imagined that if I wanted to experiment with making complex, layered emulsions, I would get a bunch of glass microscope slides, put a lightproof box over a spincoater, then drip on emulsions with some lightproof arrangement of syringes onto the spinning plate. I've seen examples of people making tiny wetplates/dryplates that fit medium format and even 35mm cameras which, besides being really cool (and kinda cute), always struck me as faster to iterate on. You can even pop it right in a microscope easily to evaluate it!
In theory!