Patent ID: 9624090
Date: 2017-04-18
CPC Classifications: B81B,G01P

Claim:
1. A micro-electro-mechanical system (MEMS) device, comprising: a substrate; a proof mass, including an outer frame and at least one inner extension portion, the outer frame inwardly defining an internal space, the inner extension portion being directly connected to the outer frame and inwardly extending from the outer frame, wherein the inner extension portion and the outer frame are one integral piece such that the inner extension portion and the outer frame have the same motion in the same direction when the proof mass moves; at least one compliant structure, located in the internal space, the at least one compliant structure being directly connected to the corresponding inner extension portion; an anchor, located in the internal space and directly connected to the at least one compliant structure which assists a motion of the proof mass relative to the anchor, the anchor being connected to the substrate; a plurality of movable electrodes, located in the internal space and connected to the proof mass; and a plurality of fixed electrodes, respectively located in correspondence to the movable electrodes, and connected to the substrate through a plurality of fixing portions.