Patent ID: 8519491

Claim:
A method for making a MEMS sensing device, comprising: providing a substrate, wherein the substrate includes a first surface and a second surface opposite the first surface; forming a multilayer structure on the first surface of the substrate, wherein the multilayer structure includes a plurality of metal layers and an insulating region formed by an insulating material; forming a mask layer on the multilayer structure, wherein the mask layer having at least one mask opening which exposes a portion of the insulating material forming the insulating region; removing the portion of the insulating material through the at least one mask opening to form a chamber and at least one movable part in the chamber, such that the multilayer structure is defined as a MEMS device region; overlaying a film on the mask layer to seal the at least one mask opening such that the chamber is sealed as a sealed space; after the chamber is sealed, forming a plurality of leads on the substrate, wherein the leads are electrically connected to the MEMS device region and extend to the second surface.