It will be a long time before we can 3D print a full integrated circuit, the registration requirements will require laser interferometers. But many useful circuits will not require sub-micron scale features.

https://www.llnl.gov/news/new-3d-printer-unlocks-mind-blowing-possibilities-electronics-manufacturing

http://futurism.com/thanks-nasa-can-now-use-plasma-print-nanoelectronics/