Patent ID: 9702728
Date: 2017-07-11
CPC Classifications: G01C

Claim:
1. A method of making a Coriolis vibratory gyroscope with a three dimensional mushroom resonator element comprising: defining a cavity in a substrate wafer; bonding a cap wafer onto the substrate over the cavity from which cap wafer the mushroom resonator element will be formed; heating the substrate and cap wafer to generate a pressure build-up within the cavity; plastically deforming the cap wafer by the pressure build-up to form the mushroom resonator element having a perimeter around the mushroom resonator element; releasing the three dimensional mushroom resonator element at the perimeter by selectively removing material so that the perimeter of mushroom resonator element is free to vibrate; and disposing a layer of conductive material on the mushroom resonator element to form electrodes thereon for use in driving and sensing vibrations of the mushroom resonator element and its perimeter.