Patent ID: 9096420
Filing Date: 2015-08-04
Classification: B81B,B81C,G01C,G01P

Abstract:
1. An apparatus, comprising: a first moving electrode forming a first plate of a first capacitance and coupled to a moveable mass formed from a first layer of semiconductor material of a first thickness, the moveable mass having an upper and lower surface; a first fixed electrode formed from the first layer of semiconductor material spaced from the first moving electrode by a first gap and forming a second plate of the first capacitance; a second moving electrode formed from a second layer of semiconductor material having a second thickness less than the first thickness and overlying one of the upper and lower surfaces of the first moving electrode and coupled to the moveable mass, the second moving electrode forming a first plate of a second capacitance; and a second fixed electrode formed from the second layer of semiconductor material and overlying the first fixed electrode and coupled to the first fixed electrode, the second fixed electrode forming a second plate of the second capacitance spaced from the first plate of the second capacitance by a second gap that is less than the first gap.