ZZZ online | Number 59 German company called microTEC is manufacturing micro submarines which hull is only 650µm in the diameter and their total length is 4mm. Such submarines became reality after the development of technology called RMPD (Rapid Micro Product Development). It uses a specific, focused UV laser polymerization technique to directly cure various advanced materials at micron levels of detail. By laser exposure structuring and by gradually overlaying several hardened layers of materials, a three-dimensional device can be created in various levels of complexity. For the production of the micro sub, the process had to be capable of integrating different materials into smallest space possible.
The main objective of this submarine is to travel into the human body sending some important data to the researchers. The vessel is driven by external magnetic field, which interacts with mini magnets that are fitted into 10µm in diameter drive shaft. The drive shaft rotates as well as 600µm in diameter marine propeller affixed to it.