In this paper, the damping characteristics for electrostatically driven micro mirror which have deep grooves on their driving electrodes were investigated. A coupled simulation of gas flow and structural displacement of the micro mirror using the Fini...
In this paper, the damping characteristics for electrostatically driven micro mirror which have deep grooves on their driving electrodes were investigated. A coupled simulation of gas flow and structural displacement of the micro mirror using the Finite-Element-Method is applied to this. The damping farce is caused by squeeze action of the gas film between a moving mirror plate and the electrodes. The grooves decrease the damping force and enable the moving plate to be driven at high speed and low driving voltage.