Patent ID: 6781279
Filing Date: 2004-08-24
Classification: B81B,B81C,Y10T

Abstract:
A micro-actuator comprising:a base plate on which a predetermined pattern of signal lines is formed; a plurality of fixed comb-type electrodes that are arranged on the base plate and extend in a direction perpendicular to the base plate; a stage capable of a see-saw motion that is arranged at a predetermined height from the top of the base plate; a plurality of driving comb-type electrodes which are formed parallel to each other on the bottom of the stage and whose ends extend between the fixed comb-type electrodes; a torsion bar with a predetermined length and thickness that is arranged at both ends of the stage forming one body with the stage in order to enable the see-saw motion of the stage, wherein the thickness of the torsion bar is less than the plurality of driving comb-type electrodes in a direction parallel to the plurality of driving comb-type electrodes; a first frame layer connected to both ends of the torsion bar; a second frame layer that is positioned below the first frame layer, thus forming a layered structure with the first frame layer; and a metal eutectic bonding layer formed between the first and second frame layers to bond them together, wherein the fixed comb-type electrodes are formed on an electrode base that is arranged on the base plate, and the electrode base, the fixed comb-type electrodes and the second frame layer are formed of the same material.