Patent ID: 9107017
Filing Date: 2015-08-11
Classification: B81B,B81C,H01L,H04R

Abstract:
1. An etching method for manufacturing MEMS devices, comprising: providing a substrate including a first surface and a second surface opposite to the first surface, arranging a base structure, a sacrificial structure and at least one adhesion layer on the first surface of the substrate, wherein the adhesion layer is disposed between the base structure and the sacrificial structure, the base structure is disposed between the adhesion layer and the substrate; performing a surface grinding process on the second surface of the substrate; performing a first plasma etching process by using a first mixed gas to remove the sacrificial structure, wherein the first mixed gas comprising oxygen and a first nitrogen-based gas; and performing a second plasma etching process by using a second mixed gas to remove the adhesion layer, wherein the second mixed gas includes a second nitrogen-based base gas and a fluorine-based gas.