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Design, Fabrication and Analysis of Silicon Hollow Microneedles for Transdermal Drug Delivery System for Treatment of Hemodynamic Dysfunctions

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Cardiovascular Engineering

Abstract

In this paper, we present design, fabrication and coupled multifield analysis of hollow out-of-plane silicon microneedles with piezoelectrically actuated microfluidic device for transdermal drug delivery (TDD) system for treatment of cardiovascular or hemodynamic disorders such as hypertension. The mask layout design and fabrication process of silicon microneedles and reservoir involving deep reactive ion etching (DRIE) is first presented. This is followed by actual fabrication of silicon hollow microneedles by a series of combined isotropic and anisotropic etching processes using inductively coupled plasma (ICP) etching technology. Then coupled multifield analysis of a MEMS based piezoelectrically actuated device with integrated silicon microneedles is presented. The coupledfield analysis of hollow silicon microneedle array integrated with piezoelectric micropump has involved structural and fluid field couplings in a sequential structural-fluid analysis on a three-dimensional model of the microfluidic device. The effect of voltage and frequency on silicon membrane deflection and flow rate through the microneedle is investigated in the coupled field analysis using multiple code coupling method. The results of the present study provide valuable benchmark and prediction data to fabricate optimized designs of the silicon hollow microneedle based microfluidic devices for transdermal drug delivery applications.

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Acknowledgments

The authors would like to thank and acknowledge K. Saejok, C. Hruanun, Atthi N. Somwamg, and J. Supadech at Thai Microelectronics Center (TMEC), Thailand for providing DRIE facility and process for microneedle fabrication.

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Authors and Affiliations

  1. School of Engineering and Technology, Asian Institute of Technology (AIT), Bangkok, Thailand

    M. W. Ashraf, S. Tayyaba, A. Nisar, N. Afzulpurkar & D. W. Bodhale

  2. Nanoelectronics and MEMS Lab, National Electronics and Computer Technology Center (NECTEC), Bangkok, Thailand

    T. Lomas & A. Tuantranont

  3. Thai Microelectronics Center (TMEC), Bangkok, Thailand

    A. Poyai

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  1. M. W. Ashraf
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  2. S. Tayyaba
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  3. A. Nisar
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  4. N. Afzulpurkar
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Correspondence to M. W. Ashraf.

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Ashraf, M.W., Tayyaba, S., Nisar, A. et al. Design, Fabrication and Analysis of Silicon Hollow Microneedles for Transdermal Drug Delivery System for Treatment of Hemodynamic Dysfunctions. Cardiovasc Eng 10, 91–108 (2010). https://doi.org/10.1007/s10558-010-9100-5

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  • DOI: https://doi.org/10.1007/s10558-010-9100-5

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