The increased cost comes from the difficulty of producing such circuits as they take more time and effort than circuits today.

Companies such as Linear Technology and Maxim produce integrated circuits that implement this functionality.

HDL synthesis tools usually produce circuits that operate only on binary logic.

However, wires which touch each other will produce cross connections, short circuits, and fire hazards.

This would change the future and make it easier to produce and sell integrated circuits.

Tin whiskers don't have to be airborne to damage equipment, as they are typically already growing in an environment where they can produce short circuits.

Wafer fabrication is a procedure composed of many repeated sequential processes to produce complete electrical or photonic circuits.

Mosel Vitelic was a company that produced integrated circuits for memory.

It provides a feasible fabrication process to produce circuits operating at microwave and millimetre-wave frequencies.

If it's not economically feasible to produce circuits with smaller transistors there may be no reason to pursue further development.