3 ms·
> Even dumber question, why do they need to be circular? The wafer is round because it's cut from a cylinder of silicon. And the cylinder is a cylinder because
by racingmars 6y ago
> Even dumber question, why do they need to be circular?
The wafer is round because it's cut from a cylinder of silicon. And the cylinder is a cylinder because spinning is involved in the process to make it. Hence, thanks to centripetal force, it ends up being round!