Patent ID: 7795063
Filing Date: 2010-09-14
Classification: B81C

Abstract:
1. A method for forming a micro-electro-mechanical systems (MEMS) device, comprising: providing a substrate; forming a first structural dielectric layer over the substrate, wherein the first structural dielectric layer including a conductive pattern embedded therein; forming an etching stop layer over the first structural dielectric layer; forming a second structural dielectric layer over the etching stop layer, wherein the second structural dielectric layer serves as at least a part of a micro-machine diaphragm; patterning the substrate from a back side to form a plurality of perforating openings in the substrate to expose the first structural dielectric layer; and patterning the first structural dielectric layer through the perforating openings of the substrate to form a chamber in the first structural dielectric layer under the second structural dielectric layer, wherein the etching stop layer is used as a stop when etching the first structural dielectric layer.