If there are billions of transistors in a CPU, there is no chance that somebody designed every single one of them manually. Is their layout calculated or something?
In: 1270
In short, yes. The earliest CPUs were designed, laid out, and figured by hand. At that time, every single transistor had a human hand in its placement. Once CPUs became advanced enough, they could be used to design better , more advanced, more complex and compact CPUs. Those could then generate even *more* advanced CPUs. So you get a cascade effect of advancement in design, where all these transistors can be planned, traced, placed, and optimized without the need for a human being to place each one.
The software that build’s today’s CPUs would not be possible without yesterday’s CPUs.
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