Electron microscopes already exist today. It's impossible to predict what advances in microscopic imaging might be made in the next 3000 years, but if we assume

Electron microscopes already exist today. It's impossible to predict what advances in microscopic imaging might be made in the next 3000 years, but if we assume they at least don't regress, I think there's a fair chance that a dug-up integrated circuit could be recreated in software based on an image of the die.