Patent ID: 8432232

Claim:
A micro electro mechanical system (MEMS) device comprising: a substrate; an under layer that is formed above the substrate; an insulating layer that is formed above the under layer; a first coated layer that is formed above the insulating layer, the first coated layer having a plurality of through holes; a second coated layer that is formed on the first coated layer; a cavity defined by the under layer at a bottom of the cavity, the insulating layer at a side of the cavity, and the coated layer at a top of the cavity; a first vibrator that is provided inside the cavity and that has a first natural frequency; and a second vibrator that is provided inside the cavity and that has a second natural frequency that is different from the first natural frequency, wherein the second coated layer covers the plurality of through holes, and the first vibrator and the second vibrator share a common electrode.