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Is in-house CPU printing a (future) possibility? I don’t know a lot about manufacturing, but is a an etching machine a possibility to make custom boards or chip

• mschuster91 6y ago
  Not with current fab / material processes. Silicon Valley hosts the most Superfund sites in the US for a reason - there's an awful lot of really nasty chemicals involved in semiconductor manufacturing, some of which can probably be used to make drugs or explosives (so subject to various control laws), and the feature sizes are so small that the fabs require expensive air filters... Custom boards are a thing already, you can go up to three layers in an amateur/hobbyist setting AFAIK, but that won't help you much when dealing with high-frequency stuff or very fine pitch settings as the thickness and other parameters will vary across the board. Many countries already have somewhat cheap-ish "rapid prototype PCB" shops, some even do assembly for you. That's good enough even for most HF stuff.