FEM Analysis of Buckled Dielectric Thin-Film Packaging Based on 3D Direct Numerical Simulation
1Center for Nanoscience and Nanotechnology (C2N), University-Paris-Saclay, 91400 Palaiseau, France.
Micromachines
|July 29, 2023
Summary
This study uses 3D direct numerical simulation to analyze buckled thin-film packaging. Researchers found two primary buckling modes influencing packaging cover shape, dependent on material elasticity and applied strain.
Area of Science:
- Materials Science
- Mechanical Engineering
- Computational Mechanics
Background:
- Thin-film packaging is crucial for microelectronic devices.
- Understanding thin-film buckling is essential for reliable packaging.
- Conventional simulations struggle to capture complex buckling behaviors.
Purpose of the Study:
- To investigate the mode change in buckled thin-film packaging.
- To develop a novel 3D finite element method (FEM) model for direct buckling simulation.
- To analyze the influence of material properties and strain on buckling modes.
Main Methods:
- 3D direct numerical simulation of buckled thin-film packaging.
- Finite Element Method (FEM) modeling.
- Experimental measurement of thin-film cap shape post-debonding.
Main Results:
- Identified two main buckling modes determining the packaging cover shape.
- Demonstrated that elasticity ratio between cap and sealing ring dictates the mode.
- Observed a mode shift from wrinkling to out-of-plane due to applied strain.
Conclusions:
- Direct buckling simulation is effective for analyzing thin-film packaging.
- Material elasticity and applied strain are key factors in thin-film buckling modes.
- The study provides insights into designing robust thin-film packaging structures.
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