Patent ID: 7282383

Claim:
A micromachine production method comprising the steps of: forming, on a substrate, a first electrode having, on a surface, a stopper film; forming, on the substrate, an insulating film to a thickness larger than that of the first electrode including the stopper film so as to cover the first electrode and the stopper film, said insulating film formed to have a minimum thickness equal to or less than 50 nm; polishing the insulating film to expose the stopper film to the outside and also to planarize a polished surface; forming an opening in a portion of the stopper film on the first electrode, then burying a sacrifice film in the opening and planarizing a surface of the sacrifice film in the same manner as for the surface of the insulating film; forming a vibrator electrode on the insulating film so as to cross over the sacrifice film; and removing the sacrifice film after forming the vibrator electrode to form a space between the first electrode and the vibrator electrode.