Laser processes for MEMS manufacture

Andrew S. Holmes

doi:10.1117/12.456807

25 February 2002 Laser processes for MEMS manufacture

Andrew S. Holmes

Proceedings Volume 4426, Second International Symposium on Laser Precision Microfabrication; (2002) https://doi.org/10.1117/12.456807
Event: Second International Symposium on Laser Precision Micromachining, 2001, Singapore, Singapore

Abstract

This paper discusses the use of excimer lasers in the manufacture of microelectromechanical devices and systems, with emphasis on two application areas: laser micromachining of polymer masters for replication in metal by electroplating (Laser-LIGA), and laser-assisted manipulation of microparts for hybrid assembly. As a master fabrication method, laser micromachining offers advantages over conventional UV lithography in terms of materials flexibility and 3-dimensional capability. However, these advantages are offset by higher cost and lower throughput. We have been using a combination of laser micromachining an UV lithography to produce relatively complex multi-level fluidic devices, with laser micromachining being used only for layers requiring greater structural height and/or 3D profiling. Process details and examples of prototype devices are presented. Laser-assisted assembly is a new technique based on release and transport of parts by ablation of a sacrificial layer, using light incident through the substrate. We have been using this approach to assemble microelectromechanical devices from parts fabricated on separate substrates. Fundamental aspects of the process are discussed, and results are presented for hybrid electrostatic micromotors assembled by laser-assisted transfer of nickel parts.

Citation Download Citation

Andrew S. Holmes "Laser processes for MEMS manufacture", Proc. SPIE 4426, Second International Symposium on Laser Precision Microfabrication, (25 February 2002); https://doi.org/10.1117/12.456807

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