Researcher were able to 3D print metals with high melting points using a new process they outlined in a paper published recently in Advanced Materials. The process, which relies on a method known as Laser-Induced Forward Transfer, can achieve incredibly intricate results as fine as 5 micrometers in diameter. The Laser-Induced Forward Transfer Process method uses a film of metal which is propeled towards a build platform during it's phase changed caused by coming in contact with a high power laser. More details on this research and how the printing process works can be found here: http://3dprint.com/72342/lift-3d-printing/

Below is a microscopic look at the 3D printed pillars in gold and copper: