Micromirror actuator

Abstract

Disclosed is a micromirror actuator that includes: a substrate provided with an insulating layer formed thereon; two lower columns spaced from each other by a designated distance, and formed on the insulating layer; a first torsion bar extending over upper surfaces of the lower columns; a second torsion bar formed so that the first and second torsion bars are orthogonal to each other; four electrodes, each disposed in four areas formed by the orthogonal crossing of the first and second torsion bars, formed on the insulating layer; two upper columns formed on an upper surface of the second torsion bar so that the upper surfaces of the upper columns are located at higher positions than the upper surfaces of the electrodes; and a micromirror located on the upper surfaces of the upper columns so that the micromirror is supported by the upper columns.