Microfluidic valve array control system integrating a fluid demultiplexer circuit

Kentaro Kawai, Kenta Arima, Mizuho Morita, Shuichi Shoji

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

This paper proposes an efficient control method for the large-scale integration of microvalves in microfluidic systems. The proposed method can control 2n individual microvalves with 2n + 2 control lines (where n is an integer). The on-chip valves are closed by applying pressure to a control line, similar to conventional pneumatic microvalves. Another control line closes gate valves between the control line to the on-chip valves and the on-chip valves themselves, to preserve the state of the on-chip valves. The remaining control lines select an activated gate valve. While the addressed gate valve is selected by the other control lines, the corresponding on-chip valve is actuated by applying input pressure to the control line to the on-chip valves. Using this method would substantially reduce the number of world-to-chip connectors and off-chip valve controllers. Experiments conducted using a fabricated 28 microvalve array device, comprising 256 individual on-chip valves controlled with 18 (2 x 8 + 2) control lines, yielded switching speeds for the selected on-chip valve under 90 ms.

Original languageEnglish
Article number065016
JournalJournal of Micromechanics and Microengineering
Volume25
Issue number6
DOIs
Publication statusPublished - 2015 Jun 1

Keywords

  • demultiplexer
  • fluid logic circuit
  • hydraulic valve
  • microvalve
  • pneumatic valve
  • valve control system

ASJC Scopus subject areas

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

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