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E Soylemez¹, R A Plass, W R Ashurst

¹Mechanical Engineering Department, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.

The Review of Scientific Instruments

|August 2, 2013

Summary

A new system allows precise control of environmental factors like humidity and pressure for micromechanical systems. This enables detailed study of micromachine performance and surface adhesion, crucial for device reliability.

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Area of Science:

Materials Science
Mechanical Engineering
Environmental Science

Background:

Micromechanical systems performance is highly sensitive to their operating environment.
Controlling environmental parameters like humidity, pressure, and gas composition is critical for accurate micromachine characterization.
Existing instrumentation for environmental control poses significant challenges.

Purpose of the Study:

To develop a custom system for precise environmental control of micromechanical systems.
To enable comprehensive characterization of micromachine behavior under varied environmental conditions.
To facilitate in situ surface cleaning and advanced analysis.

Main Methods:

A novel micromachine characterization system integrating environmental control (pressure, humidity, gas composition).
Incorporation of advanced characterization techniques: long working distance interferometry, electrical probing, and actuation scripting.
Implementation of an effective in situ surface cleaning mechanism.

Main Results:

Demonstrated capability for full environmental control during micromachine operation.
Successfully conducted a microcantilever crack healing experiment under controlled humidity.
Tracked surface adhesion energy changes over time following humidity alterations.

Conclusions:

The developed system provides unprecedented control for studying environmental effects on micromechanical systems.
The system is effective for in situ experiments, such as monitoring crack healing and adhesion changes.
This research enables a deeper understanding of micromechanical system reliability in diverse environments.