Patent ID: 8435821

Claim:
A method for fabricating a sensor comprising the steps of: forming a diaphragm cavity that extends into the top surface of a substrate wafer, the top surface of the substrate wafer comprising silicon; bonding said silicon top surface of said substrate wafer directly to the bottom surface of as device wafer, the bottom surface of the device wafer comprising silicon, without an intermediate insulating layer forming a diaphragm over said diaphragm cavity, wherein said device wafer comprises a device layer whose silicon bottom surface forms the silicon bottom surface of the device wafer, a handle, and an insulator layer located between said device layer and said handle; removing said handle and said insulator layer from said device wafer; placing a sensing element, in said device layer proximate said diaphragm to sense flexure in said diaphragm; and forming an interconnect channel by removing a portion of said device layer.