Patent ID: 9010185
Filing Date: 2015-04-21
Classification: G01P

Abstract:
1. A three-dimensional micro-electro-mechanical-system sensor, comprising: a substrate; a fixed frame fixed on the substrate; a proof mass; at least one spring part connecting the fixed frame and the proof mass; a plurality of first electrodes and a plurality of second electrodes respectively extending from the proof mass toward the fixed frame; and a plurality of third electrodes and a plurality of fourth electrodes respectively extending from the fixed frame toward the proof mass, wherein the first electrodes and the third electrodes form at least one first capacitor and at least one second capacitor, and the second electrodes and the fourth electrodes form at least one third capacitor, wherein a displacement of the proof mass along a first axis generates a change in the capacitance of the first capacitor, a displacement of the proof mass along a second axis generates a change in the capacitance of the second capacitor, a displacement of the proof mass along a third axis generates a change in the capacitance of the third capacitor, and the first, second, and third axes define a three-dimensional coordinate system; the first electrodes overlap with the fourth electrodes along the direction of the third axis, and the third electrodes overlap with the second electrodes along the direction of the third axis.