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Development of MEMS cantilever-based biosensor

The research developments in biosensor are progressing tremendously, not only contributed by arising security and medical concern in the society but also rapid advancements in Micro Electro Mechanical System (MEMS) technology. Among the developed micron-sized biosensor devices in MEMS technology, mi...

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Main Authors: Ab Rahim, Rosminazuin, Za'bah, Nor Farahidah
Format: Monograph
Language:English
Published: 2015
Subjects:
T Technology (General)
Online Access:http://irep.iium.edu.my/44911/1/IREP_Report_EDW_B.pdf
http://irep.iium.edu.my/44911/
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spelling my.iium.irep.449112018-10-27T16:04:48Z http://irep.iium.edu.my/44911/ Development of MEMS cantilever-based biosensor Ab Rahim, Rosminazuin Za'bah, Nor Farahidah T Technology (General) The research developments in biosensor are progressing tremendously, not only contributed by arising security and medical concern in the society but also rapid advancements in Micro Electro Mechanical System (MEMS) technology. Among the developed micron-sized biosensor devices in MEMS technology, microcantilever-based biosensors are identified as the most promising candidates for its high sensitivity, high resolution and label-free molecular recognition. Integrated with on-chip piezoresistive readout scheme, the microcantilever biosensor provides promising developments in the integration of MEMS portable analytical device. However, the realization of the piezoresistive microcantilever biosensor through various microfabrication techniques is not straightforward. Microcantilever sensor typically comes in a rectangular shape which usually comprises of two layers of piezoresistor and microcantilever. This design has its fabrication issue such as an interfacing problem between the piezoresistive and microcantilever layers and complex fabrication process. Therefore, this work attempts to provide the process development of effective design of piezoresistive microcantilever (PRM) biosensor through simple and reliable fabrication processes using bulk micromachining technique. In this work, a novel paddle-like microcantilever structure with 50 µm x 50 µm square hole located at the clamped edge is proposed. The incorporated square hole acts as a stress concentration region by maximizing the Mises stress value. The design consideration is analyzed and verified using a finite element solver, CoventorWare 2008. At a dimension of 450 µm x 150 µm x 2 µm, a mechanical displacement of 5 µm for 1 µN applied load results in sensitivity of ΔR/R of 4.84 x 10-3. The development of single-layer doped silicon piezoresistive microcantilever with dual-leg rectangular microcantilever does not only simplify the fabrication process due to reduced fabrication steps, but also conveniently eliminates the interfacing problem that commonly exists in multilayer structures. Connecting to on-chip Wheatstone bridge circuitry, the dual-leg design of the device also ensures efficient current distribution in the piezoresistive microcantilever sensor at relatively higher sensitivity compares to typical rectangular-shaped microcantilever. 2015 Monograph NonPeerReviewed application/pdf en http://irep.iium.edu.my/44911/1/IREP_Report_EDW_B.pdf Ab Rahim, Rosminazuin and Za'bah, Nor Farahidah (2015) Development of MEMS cantilever-based biosensor. Research Report. UNSPECIFIED. (Unpublished)
institution Universiti Islam Antarabangsa Malaysia
building IIUM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider International Islamic University Malaysia
content_source IIUM Repository (IREP)
url_provider http://irep.iium.edu.my/
language English
topic T Technology (General)
spellingShingle T Technology (General)
Ab Rahim, Rosminazuin
Za'bah, Nor Farahidah
Development of MEMS cantilever-based biosensor
description The research developments in biosensor are progressing tremendously, not only contributed by arising security and medical concern in the society but also rapid advancements in Micro Electro Mechanical System (MEMS) technology. Among the developed micron-sized biosensor devices in MEMS technology, microcantilever-based biosensors are identified as the most promising candidates for its high sensitivity, high resolution and label-free molecular recognition. Integrated with on-chip piezoresistive readout scheme, the microcantilever biosensor provides promising developments in the integration of MEMS portable analytical device. However, the realization of the piezoresistive microcantilever biosensor through various microfabrication techniques is not straightforward. Microcantilever sensor typically comes in a rectangular shape which usually comprises of two layers of piezoresistor and microcantilever. This design has its fabrication issue such as an interfacing problem between the piezoresistive and microcantilever layers and complex fabrication process. Therefore, this work attempts to provide the process development of effective design of piezoresistive microcantilever (PRM) biosensor through simple and reliable fabrication processes using bulk micromachining technique. In this work, a novel paddle-like microcantilever structure with 50 µm x 50 µm square hole located at the clamped edge is proposed. The incorporated square hole acts as a stress concentration region by maximizing the Mises stress value. The design consideration is analyzed and verified using a finite element solver, CoventorWare 2008. At a dimension of 450 µm x 150 µm x 2 µm, a mechanical displacement of 5 µm for 1 µN applied load results in sensitivity of ΔR/R of 4.84 x 10-3. The development of single-layer doped silicon piezoresistive microcantilever with dual-leg rectangular microcantilever does not only simplify the fabrication process due to reduced fabrication steps, but also conveniently eliminates the interfacing problem that commonly exists in multilayer structures. Connecting to on-chip Wheatstone bridge circuitry, the dual-leg design of the device also ensures efficient current distribution in the piezoresistive microcantilever sensor at relatively higher sensitivity compares to typical rectangular-shaped microcantilever.
format Monograph
author Ab Rahim, Rosminazuin
Za'bah, Nor Farahidah
author_facet Ab Rahim, Rosminazuin
Za'bah, Nor Farahidah
author_sort Ab Rahim, Rosminazuin
title Development of MEMS cantilever-based biosensor
title_short Development of MEMS cantilever-based biosensor
title_full Development of MEMS cantilever-based biosensor
title_fullStr Development of MEMS cantilever-based biosensor
title_full_unstemmed Development of MEMS cantilever-based biosensor
title_sort development of mems cantilever-based biosensor
publishDate 2015
url http://irep.iium.edu.my/44911/1/IREP_Report_EDW_B.pdf
http://irep.iium.edu.my/44911/
_version_ 1643617735570096128
score 13.211869

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