Patent ID: 8084285
Filing Date: 2011-12-27
Classification: B81B,B81C

Abstract:
1. A method of forming a micro-electro mechanical system (MEMS), comprising: removing material from a first wafer to define a first movable portion corresponding to an x-y accelerometer and a second movable portion corresponding to a z accelerometer, wherein each said movable portion comprises at least one flexure member and at least one proof mass, each of said proof mass and said flexure member being formed by the selective removal of material from a top side and a bottom side of said first wafer; bonding said first wafer to a second wafer comprising an electronic circuit, such that a gap is defined between said first wafer and said second wafer; wherein a thickness of said at least one flexure member of said first movable portion is independent of a thickness of said at least one flexure member of said second movable portion and a thickness of said proof mass of said first movable portion is independent of a thickness of said at least one proof mass of said second movable portion.