Patent ID: 8413511
Filing Date: 2013-04-09
Classification: G01P

Abstract:
1. An accelerometer comprising: a substrate define a stationary electrode thereon, a first moveable mass defining a conductive-layer thereon facing the stationary electrode; a plurality of first elastic elements coupled with a peripheral side of the first moveable mass; a first fixed element surrounding the first moveable mass, coupled with the first elastic elements and fixedly attached to the substrate; a plurality of first fixed electrodes extending outwardly from the first fixed element; a second moveable mass surrounding the first fixed electrodes; a plurality of first moveable electrodes extending inwardly from the second moveable mass toward the first fixed element and parallel to the first fixed electrodes, respectively; a plurality of second elastic elements coupled with a peripheral side of the second moveable mass; and a second fixed element surrounding the second moveable mass, coupled with the second elastic element and fixedly attached to the substrate.