Patent ID: 6894819
Filing Date: 2005-05-17
Classification: B81B,G02B,Y10S

Abstract:
1. A micromirror actuator comprising: a first substrate in which a trench having a predetermined shape is formed; at least one lower electrode that is formed in the trench; a micromirror that faces the trench and is operative to pivot due to electrostatic forces and selectively reflects incident light depending on pivoting positions thereof; a second substrate having two parts that are formed on a portion of the first substrate and underneath the micromirror, respectively, and prevents the deformation of the micromirror; an upper electrode that is formed on the part of the second substrate disposed on the first substrate and applies power to the micromirror; a pair of support posts that protrude from the first substrate proximate to sides of the trench; and torsion bars that connect sides of the micromirror to the pair of support posts to support the micromirror so that the micromirror pivots, wherein the micromirror pivots due to an electrostatic force generated by a difference between potentials applied to the micromirror and the lower electrode.