Also, that first one was quite a bit bigger than 1 mm^2 [1] There's nothing for scale, but standing like that i'd guess 2 or 3 inches across, something like 800

Also, that first one was quite a bit bigger than 1 mm^2 [1] There's nothing for scale, but standing like that i'd guess 2 or 3 inches across, something like 800 mm^2. [1] https://en.wikipedia.org/wiki/History_of_the_transistor#/media/File:Replica-of-first-transistor.jpg https://en.wikipedia.org/wiki/History_of_the_transistor#/med...