Micro manufacturing involves processes used to fabricate micro components or create micro features on parts. Some key micro manufacturing processes include diamond turning, laser welding, and micro drilling. Diamond turning can machine microgrooves as small as 2.5 μm wide by 1.6 μm deep. Laser beam welding comes in two types: surface heating and through transmission infrared welding. Nano manufacturing deals with even smaller scales down to 1 nanometer. Approaches include top-down methods like focused beam lithography and nanoimprint lithography as well as bottom-up methods such as chemical vapor deposition and dip pen lithography. These techniques have applications in precision manufacturing of devices used in areas like semiconductor fabrication, medical devices, and more.