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.
?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
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.