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- Title
Magnetically-actuated bending-mode microactuators with excimer laser ablation.
- Authors
Pan, C. T.; Shen, S. C.; Hsieh, C. C.
- Abstract
Bending-mode polyimide-based (PI) electromagnetic microactuators with different geometries were fabricated and tested. Fabrication of the electromagnetic microactuator consists of electroplated 10 μm thick Ni/Fe (80 : 20) permalloy on a PI diaphragm, high aspect ratio electroplating of a copper planar micro-coil, bulk micromachining, low-temperature bonding, and 248 nm excimer laser selective ablation. They were fabricated by a novel concept avoiding the etching selectivity and residual stress problems which occur during wafer etching. The magnetic field generated by the planar micro-coil was used to provide an external magnetic field (Hext) to interact with Ni/Fe on the PI diaphragm, by which a repulsive force can be induced to provide a large deflection angle. The deflection angle of the microactuator with different Hext values was measured. Preliminary results show that 82° can be obtained. In addition, to provide a high strength and low temperature bonding process for the microactuator system, a polymer-based photoresist with patternable characteristics was used as the adhesive bonding material. The bonding results for different photoresists are compared and discussed.
- Subjects
MICROACTUATORS; EXCIMER lasers; LASER ablation; ELECTROPLATING; LOW temperatures; PHOTORESISTS
- Publication
Plastics, Rubber & Composites, 2004, Vol 33, Issue 8, p338
- ISSN
1465-8011
- Publication type
Article
- DOI
10.1179/174328904X22332