0.03 mm is actually smaller than a standard hair diameter. It is said φ 0.05 mm is the smallest limit by machining at this moment. Our moulding and sintering technology using super fine metal powder, which cultivated as μ-MIM technology, realizes dense smooth surface, the roughness of Ra = 0.3 without post-processing. In microfabrication like this nozzle, it is difficult to achieve this surface quality even with the latest laser processing technology due to the problem of dross deposits or residual thermal stress and so on.