Sharp tipped plastic hollow microneedle array by microinjection moulding

Kai Leung Yung, Yan Xu, Chunlei Kang, H. Liu, K. F. Tam, S. M. Ko, F. Y. Kwan, Ming Hung Thomas Lee

Research output: Journal article publicationJournal articleAcademic researchpeer-review

63 Citations (Scopus)


A method of producing sharp tipped plastic hollow microneedle arrays using microinjection moulding is presented in this paper. Unlike traditional approaches, three mould inserts were used to create the sharp tips of the microneedles. Mould inserts with low surface roughness were fabricated using a picosecond laser machine. Sharp tipped plastic hollow microneedles 500 νm in height were fabricated using a microinjection moulding machine developed by the authors group. In addition, the strength of the microneedle was studied by simulation and penetration experiments. Results show that the microneedles can penetrate into skin, delivering liquid successfully without any breakage or severe deformation. Techniques presented in this paper can be used to fabricate sharp tipped plastic hollow microneedle arrays massively with low cost.
Original languageEnglish
Article number015016
JournalJournal of Micromechanics and Microengineering
Issue number1
Publication statusPublished - 1 Jan 2012

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering


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