Patent ID: 9246018
Filing Date: 2016-01-26
CPC Classification: B81B,G01C,G01P,H01L

Claim Text:
1. An inertial measurement system, comprising: a device layer including a single proof-mass 3-axis gyroscope formed in an x-y plane, the single proof-mass 3-axis gyroscope including: a main proof-mass section suspended about a single, central anchor, the main proof-mass section including a radial portion extending outward towards an edge of the 3-axis gyroscope sensor; a central suspension system configured to suspend the 3-axis gyroscope from the single, central anchor; a drive electrode including a moving portion and a stationary portion, the moving portion coupled to the radial portion, wherein the drive electrode and the central suspension system are configured to oscillate the 3-axis gyroscope about a z-axis normal to the x-y plane at a drive frequency; symmetrical x-axis proof-mass sections configured to move anti-phase along the x-axis in response to z-axis angular motion; and a z-axis gyroscope coupling flexure bearing configured to couple the x-axis proof mass sections and to resist in-phase motion between the x-axis proof mass sections; a cap wafer bonded to a first surface of the device layer; and a via wafer bonded to a second surface of the device layer, wherein the cap wafer and the via wafer are configured to encapsulate the single proof-mass 3-axis gyroscope.