With today's miniaturization technology, how detailed could the tiny

[uncleclover]

Lincoln on the backs of pennies be made? If you look at the back of a modern U.S. penny, you'll see the Lincoln Memorial. If you look closely between the middle two pillars, the tiny figure of The Lincoln Statue can be discerned. We are at a level of miniaturization ability now that thousands of circuits can be put onto the head of a pin. So I guess the real question is whether or not that kind of miniaturization technology and our ability to miniaturize features on cast objects (i.e., injection molded objects as opposed to etched, as in circuits) is comparable. If so, it would seem that we could possibly even cast the likeness of the Lincoln statue all the way to the point of being able to distinguish the pupils of his eyes. If that can be done, that would be a -very- interesting thing to do for the next Lincoln's birthday - the U.S. mint has been playing a lot with U.S. money these days - they've done quarters and nickels, this could be yet another way to drum up some more interest in coin-collecting, at least for a bit.
...and to be clear, I -do- mean "How detailed can we make it with the current coin-striking process?" - not how small we could make it if pennies were etched instead of struck.