It’s a cool idea and I would love to see it too. But you would be better off making something entirely different that leverages the strengths of biological computing instead of trying to make an integrated circuit. Past 1980s node sizes we rapidly got so small its well below the size of a cell or even complex proteins. Our current technology is roughly the size of DNA itself, and proteins are monstrous in size by comparison and tend to wiggle around like jello due to Brownian motion at molecular scales.
Interestingly I think you could probably make a green PCB process though. Currently we use ferrous solutions to etch copper which need to be neutralized and wreak Havok on waterways if they aren’t. I think making a biological biofilm that eats copper in certain areas and not others could work? It would be slower though, and honestly PCBs require some pretty intense feature sizes (not as bad as ICs but still really challenging) for things like tiny blind vias on extremely small traces. (Btw vias are like bridges from one layer of a circuit board to the next. A through via goes all the way through. A blind via is hidden within internal layers inside of a board)
Where I think this could be really cool is masking out vias and having your microbe drill for you over time. Surprisingly a large part of a PCB’s cost is tungsten drill bits. It’s still the fastest and most accurate way to drill fiberglass for forming vias but it’s slow when you need to do hundreds or thousands per board. For extremely small vias the bits get insanely expensive and fragile too.
It’s a cool idea and I would love to see it too. But you would be better off making something entirely different that leverages the strengths of biological computing instead of trying to make an integrated circuit. Past 1980s node sizes we rapidly got so small its well below the size of a cell or even complex proteins. Our current technology is roughly the size of DNA itself, and proteins are monstrous in size by comparison and tend to wiggle around like jello due to Brownian motion at molecular scales.
Interestingly I think you could probably make a green PCB process though. Currently we use ferrous solutions to etch copper which need to be neutralized and wreak Havok on waterways if they aren’t. I think making a biological biofilm that eats copper in certain areas and not others could work? It would be slower though, and honestly PCBs require some pretty intense feature sizes (not as bad as ICs but still really challenging) for things like tiny blind vias on extremely small traces. (Btw vias are like bridges from one layer of a circuit board to the next. A through via goes all the way through. A blind via is hidden within internal layers inside of a board)
Where I think this could be really cool is masking out vias and having your microbe drill for you over time. Surprisingly a large part of a PCB’s cost is tungsten drill bits. It’s still the fastest and most accurate way to drill fiberglass for forming vias but it’s slow when you need to do hundreds or thousands per board. For extremely small vias the bits get insanely expensive and fragile too.