Yes, and not exact. While every mosfet transistor have mode could considered genuine quantum (tunnel effect), it is not used in computers, it used in microwave

Yes, and not exact. While every mosfet transistor have mode could considered genuine quantum (tunnel effect), it is not used in computers, it used in microwave generators/detectors. What used in computers, are just switch mode (electric field creating/moving/changing conducting zone), which is mostly classic physics and created as fruit of garage engineering, without understanding of quantum mechanics. And yes, this is very abstract border, as I know, 100% quantum effects considered when working with single atom or single electron (something <= 1nm), but for example, 100nm transistors, usually considered as classic physics. BTW it is very interest, what will show image sensor with ~1nm sized cells. Now their cells are much larger than wavelength, but already created superlenses, could focus on nm-sized things.