A protocol for improving fabrication yield of thin SU-8 microcantilevers for use in an aptasensor

Lim, Yang Choon, Kouzani, Abbas Z., Kaynak, Akif, Dai, Xiujuan J., Littlefair, Guy and Duan, Wei 2015, A protocol for improving fabrication yield of thin SU-8 microcantilevers for use in an aptasensor, Microsystem technologies, vol. 21, no. 2, pp. 371-380, doi: 10.1007/s00542-013-2019-1.

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Title A protocol for improving fabrication yield of thin SU-8 microcantilevers for use in an aptasensor
Author(s) Lim, Yang Choon
Kouzani, Abbas Z.ORCID iD for Kouzani, Abbas Z. orcid.org/0000-0002-6292-1214
Kaynak, AkifORCID iD for Kaynak, Akif orcid.org/0000-0002-6679-657X
Dai, Xiujuan J.
Littlefair, Guy
Duan, WeiORCID iD for Duan, Wei orcid.org/0000-0001-5782-9184
Journal name Microsystem technologies
Volume number 21
Issue number 2
Start page 371
End page 380
Total pages 10
Publisher Springer
Place of publication Berlin, Germany
Publication date 2015-02
ISSN 0946-7076
1432-1858
Summary SU-8 negative photoresist has been extensively employed in the fabrication of microfluidics and microelectromechanical systems. This is due to its advantages including ease of fabrication using limited equipment, biocompatibility, excellent chemical resistance, and compatibility with silicon processing. In addition, its low Young’s modulus compared to silicon has made it an excellent choice for microcantilever structure development especially for sensing applications. This paper presents a fabrication protocol for the development of thin SU-8 microcantilevers. Factors such as baking temperatures and release methods that influence the fabrication yield of SU-8 microcantilevers are considered. The influence of the baking temperature on the deformation of the SU-8 structure is investigated using the finite element method and verified experimentally. Three release methods are studied including a dry release method using fluorocarbon film, and two wet release methods using OmniCoat sacrificial layer and polymethyl methacrylate (PMMA) sacrificial layer. The wet release method using PMMA sacrificial layer produced the highest yield. An aptasensor is formed using the SU-8 microcantilever, and its deflection measured for thrombin detection.
Language eng
DOI 10.1007/s00542-013-2019-1
Field of Research 099999 Engineering not elsewhere classified
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1 Refereed article in a scholarly journal
Persistent URL http://hdl.handle.net/10536/DRO/DU:30061702

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