Patent ID: 7998777
Filing Date: 2011-08-16
Classification: G01L

Abstract:
1. A method for fabricating a sensor comprising the steps of: forming an interconnect window in a top surface of a first device layer of a first device wafer, said first device wafer comprising said first device layer, a first insulator layer, and a first handle layer, said first insulator layer located between said first device layer and said first handle layer; placing an interconnect in said first device layer, said interconnect comprising spaced apart inner and outer interconnects located in said first device layer proximate a portion of said top surface, a lower interconnect located proximate a portion of said interconnect window, an inner interconnect feedthrough connecting said inner interconnect and said lower interconnect, and an outer interconnect feedthrough connecting said outer interconnect and said lower interconnect; forming a diaphragm cavity in a top surface of a second device layer of a second device wafer; bonding said top surface of said first device layer to said top surface of said second device layer forming a diaphragm over said diaphragm cavity; removing said first handle layer and said first insulator layer from said first device wafer; placing a sensing element in said first device layer in relation to said diaphragm to sense flexure in said diaphragm; and placing a cap over said diaphragm.