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Adaptive laser shock micro-forming for MEMS device applications.

R Zou, M Wang, S L Wang

|March 1, 2017

Summary

Adaptive optics enable precise control over laser-induced shockwaves for micro-forming. This technique engineers laser beam profiles to tailor shockwave characteristics, achieving uniform micro-forming features on MEMS structures.

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Area of Science:

Materials Science
Optical Engineering
Manufacturing Technology

Background:

Laser shock micro-forming utilizes laser-induced shockwaves for non-thermal material modification and shape adjustment.
The characteristics of these shockwaves are contingent upon the laser beam's energy profile and spatial distribution.
Precise control over shockwave generation is crucial for advanced micro-forming applications.

Purpose of the Study:

To introduce an adaptive optical technique for engineering laser beam spatial profiles.
To demonstrate control over the shapes, sizes, and locations of laser-induced shockwaves.
To investigate the impact of these controlled shockwaves on micro-forming processes.

Main Methods:

Implementation of a spatial light modulator (SLM) for adaptive laser beam shaping.
Application of the adaptive laser beam forming tool to process free-standing micro-electro-mechanical systems (MEMS) structures in aluminum.
Study of shockwave generation using multiple laser beams from the SLM.

Main Results:

Achieved highly uniform forming features on MEMS structures through engineered laser beam profiles.
Demonstrated the capability to control shockwave wavefronts (shapes and sizes) and their generation locations.
Validated the effectiveness of adaptive optics in tailoring shockwave parameters for micro-scale laser processing.

Conclusions:

Adaptive optics laser beam forming offers an effective and flexible approach for micro-forming.
This technique enables precise control over shockwave generation for advanced manufacturing at the microscale.
The method facilitates the creation of diverse shockwave patterns for tailored material processing.