Patent ID: 7839052
Filing Date: 2010-11-23
Classification: B81B,G01L,H04R

Abstract:
1. A sensing membrane, applied to a micro-electro-mechanical system (MEMS) device, comprising: a body; a stress releasing structure surrounding the body for releasing a membrane residual stress, the stress releasing structure having an elastic ring, a plurality of first perforations, a plurality of second perforations and a plurality of third perforations, wherein the first perforations are located between the body and the elastic ring, the elastic ring is located between the first perforations and the second perforations, and each of the third perforations is located between two neighboring first perforations and one of the second perforations, and the third perforations are arranged in a radiated pattern at an inner rim of the elastic ring; and a connecting portion for connecting the stress releasing structure and a substrate of the MEMS device.