Patent ID: 9434607
Filing Date: 2016-09-06
CPC Classification: B81B,B81C

Claim Text:
1. A MEMS device, comprising: a semiconductor substrate having a main surface with a first region in which a trench is formed and a second region in which an impurity diffusion region of a semiconductor circuit element is formed; a functional element provided, either directly or via an insulating film, on a bottom surface of the trench of the semiconductor substrate; a wall portion in the trench of the semiconductor substrate and forming a cavity surrounding the functional element; a lid portion that covers the cavity and includes a front surface and an edge between a top surface and a back surface defined by a thickness of the lid portion, wherein the back surface is a bottom surface of the lid portion facing the bottom surface of the trench; and a plurality of pillars in the cavity that are separated from the wall portion and in contact with either the bottom surface of the trench of the semiconductor substrate or the insulating film, and with the back surface of the lid portion.