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Erschienen in: Microsystem Technologies 1/2012

01.01.2012 | Technical Paper

Study of residual stress-induced deformation of multilayer cantilever for maskless microplasma etching

verfasst von: Li Wen, Zhen Yuan, Leili Cheng, Hongjiang Zeng, Jiaru Chu

Erschienen in: Microsystem Technologies | Ausgabe 1/2012

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Abstract

In the scanning probe microscopy-based microplasma etching system proposed by our group, the microcantilever probe integrated with microplasma device is a multilayered structure. However, the thin film residual stress generated by microfabrication process may cause undesirable bending deformation of the cantilever. In order to predict and minimize the stress-induced deformation in the cantilever design, we experimentally measure and calculate each thin film stress of the cantilever based on Stoney equation. Then the stress-induced bending deformation of the cantilever is simulated by finite element simulation. By adjusting the thickness of reserved silicon layer of the cantilever, the deflection can be minimized to <5 μm for a 750 μm-length cantilever. Finally the microcantilever probes with different thickness of reserved silicon layer are successfully fabricated by MEMS process. The bending deformation of actual fabricated cantilevers agree well with simulation results, which verifies the feasibility of the cantilever structural design. The results of this paper may lay a foundation for further scanning plasma maskless etching.

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Metadaten
Titel
Study of residual stress-induced deformation of multilayer cantilever for maskless microplasma etching
verfasst von
Li Wen
Zhen Yuan
Leili Cheng
Hongjiang Zeng
Jiaru Chu
Publikationsdatum
01.01.2012
Verlag
Springer-Verlag
Erschienen in
Microsystem Technologies / Ausgabe 1/2012
Print ISSN: 0946-7076
Elektronische ISSN: 1432-1858
DOI
https://doi.org/10.1007/s00542-011-1395-7

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