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Design Guidelines for Thin Diaphragm-Based Microsystems through Comprehensive Numerical and Analytical Studies.

Vinod Belwanshi^1,2, Kedarnath Rane³, Vibhor Kumar⁴

¹CSIR-National Metallurgical Laboratory, Jamshedpur 831007, India.

|September 28, 2023

Summary

This summary is machine-generated.

This study provides design guidelines for thin diaphragms in microsystems, using Finite Element Analysis (FEA) to ensure linear response and high sensitivity. These guidelines reduce development time and cost for microelectromechanical systems (MEMS).

Keywords:

MEMS design and analysis finite element analysis microsystems thin diaphragm

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Area of Science:

Mechanical Engineering
Materials Science
Microsystems Engineering

Background:

Thin diaphragms are critical components in microsystems like microphones and pressure sensors.
Current design processes for thin diaphragm-based microsystems (TDMS) can be iterative and time-consuming.

Purpose of the Study:

To develop comprehensive design and analysis guidelines for thin diaphragms in microsystems.
To establish empirical relations for optimizing TDMS geometry.
To determine critical dimensional ratios for linear diaphragm response.

Main Methods:

Finite Element Analysis (FEA) incorporating large deflection theory for nonlinearity.
Analytical validation with consideration for isotropic and anisotropic material properties.
Harmonic analysis to evaluate frequency response.

Main Results:

Design guidelines derived from FEA reduce fabrication iterations.
A critical dimensional ratio (a/h or 2r/h) is identified for linear diaphragm response and high sensitivity.
FEA results showed minor deviations (12-13%) from analytical calculations due to anisotropic material properties.

Conclusions:

The study offers validated design guidelines and empirical relations for thin diaphragms.
These findings enable cost and time reduction for microelectromechanical system (MEMS) developers.
The research supports the efficient design of TDMS for applications like microphones.