Patent ID: 7416910

Claim:
A method for strain isolating a micro-machined sensing mechanism in a micro-machined electromechanical system (MEMS) device, the method comprising: in a first crystalline wafer having first and second substantially planer and parallel spaced apart opposing surfaces, forming a micro-machined electromechanical force sensing mechanism having a relatively stationary frame portion substantially surrounding an operational portion; in second and third crystalline wafers each having first and second substantially planar and parallel spaced apart opposing surfaces, forming a pair of cover plates; mounting the pair of cover plates on either side of the sensing mechanism and interfaced with the frame portion thereof the mounting further comprising: interfacing a plurality of flat tipped male projections and complementary flats between the frame portion of the sensing mechanism and the first cover plate, flexibility suspending a plurality of male projections and complementary female indentations between the frame portion of the sensing mechanism and the second cover plate, and forming a bond joint between the pair of cover plates.