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It's not strictly semiconductor-related, but if there's one thing I would like to see, it's low cost, made-to-order integrated analog computers. The low power consumption of analog devices would offset the larger feature size, and hopefully the process could be made cheap/flexible enough so that needing a different IC design for each use case would be a non-issue.

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Larger feature size would help the power consumption in this case as well - larger distance between transistor features means less leakage which means less static power consumption. Dynamic power consumption would of course increase but that shouldn't be much of an issue with analog chips.

You can get your chip fabbed at the Skywater foundry for 10K (can't remember how many dies that buys you), the open source toolchain does support analog if you know what you are doing.

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