South Korean university makes world's smallest keyboard

South Korea has manufactured an ultra-miniature computer keyboard assembled from 68 parts, each sized at one ten-thousandth of a meter. However, these parts were not placed individually by robots; instead, a liquid containing these parts was simply poured onto the substrate.

On the 15th, Professor Kwon Sung-hoon's team from Seoul National University's College of Electrical Engineering announced: "After creating fine grooves (rails, guides) on the substrate, a liquid containing dozens to hundreds of micrometer (㎛, 1 micrometer is one millionth of a meter) sized ultra-small components is poured in, allowing those components to self-assemble. Through this method, items such as the Eiffel Tower, Greek temples, and a computer keyboard have been manufactured."