Patent ID: 8573059
Filing Date: 2013-11-05
Classification: G01P

Abstract:
1. A capacitive micromechanical acceleration sensor comprising: a substrate; a micromechanical functional layer situated above the substrate; an annular-shaped seismic mass enclosing an inner area being situated in the micromechanical functional layer; a suspension situated in the inner area, the suspension being anchored on the substrate and suspending the annular-shaped seismic mass using a spring mechanism; first and second fixed electrodes situated in the inner area on a first side of the suspension in the micromechanical functional layer; and third and fourth fixed electrodes situated on a second side of the suspension in the micromechanical functional layer, wherein the first and third fixed electrodes are connected to a first conductor track and the second and fourth fixed electrodes are connected to a second conductor track on the first and second sides, respectively, of the suspension, and wherein at least one of: (a) at least one first fixed electrode situated on the first side is conductively connected to a third fixed electrode situated on the second side using a first conductor in the micromechanical functional layer, and (b) at least one second fixed electrode situated on the first side is conductively connected to a fourth fixed electrode situated on the second side using a second conductor in the micromechanical functional layer.