Recent Advances in MEMS-Based 3D Hemispherical Resonator Gyroscope (HRG)-A Sensor of Choice

Area of Science:

• Microelectromechanical Systems (MEMS)
• Inertial Navigation Technology
• Materials Science

Background:

• Macro-scale hemispherical resonators are vital for high-precision motion and navigation.
• Advancements in semiconductor microfabrication enable microscale hemispherical resonator gyroscopes (µHRGs).
• Device performance hinges on resonator symmetry, thickness uniformity, and surface smoothness.

Purpose of the Study:

• To review materials, characterization, and fabrication methods for µHRGs.
• To outline advancements in semiconductor-based fabrication techniques for µHRGs.
• To present electrode integration for electrical transduction in µHRGs.

Main Methods:

• Literature review of existing research on µHRG fabrication.
• Analysis of semiconductor-based microfabrication techniques.
• Examination of materials and fabrication methods for electrode integration.

Main Results:

• Compilation of diverse materials and fabrication processes for µHRGs.
• Discussion of fabrication impacts on device characteristics and dynamic performance.
• Overview of electrode integration strategies for electrical transduction.

Conclusions:

• This review provides a comprehensive summary of µHRG fabrication.
• It aids researchers and engineers in selecting optimal materials and methods for µHRG development.
• Understanding fabrication is key to advancing µHRG technology for navigation.