From Trek Today:
In what certainly has to be the smallest scale ever for a science-fiction ship model, two scientists have constructed the USS Enterprise in a one-billionth scale. The scale model of the Enterprise is so tiny, that it can only be seen by an electron microscope.Fun fact: If you thought anything even slightly like "Sure it's a 1:1,000,000,000-scale, but it's kind of a shitty 1:1,000,000,000-scale Enterprise" upon seeing this, you are a huge, huge nerd. Thanks to everyone who sent me the tip.
Scientists Takayuki Hoshino and Shinji Matsui of the Himeji Institute of Technology, located in Japan, used a focused ion beam to cut out the model, using a process called chemical vapor deposition (CVD). The CVD process used phenanthrene gas to etch the tiny 8.8 micrometer USS Enterprise