Design of Fault-Tolerant and Dynamically-Reconfigurable Microfluidic Biochips

TL;DR

This paper introduces a simulated annealing-based method for designing fault-tolerant, reconfigurable digital microfluidic biochips that improve flexibility and reliability in molecular biology applications.

Contribution

It proposes a novel placement algorithm that enhances fault tolerance and reconfigurability in digital microfluidic biochips, addressing a key challenge in the field.

Findings

Effective module placement reduces chip area.

Enhanced fault tolerance through reconfiguration.

Successful application to PCR case study.

Abstract

Microfluidics-based biochips are soon expected to revolutionize clinical diagnosis, DNA sequencing, and other laboratory procedures involving molecular biology. Most microfluidic biochips are based on the principle of continuous fluid flow and they rely on permanently-etched microchannels, micropumps, and microvalves. We focus here on the automated design of "digital" droplet-based microfluidic biochips. In contrast to continuous-flow systems, digital microfluidics offers dynamic reconfigurability; groups of cells in a microfluidics array can be reconfigured to change their functionality during the concurrent execution of a set of bioassays. We present a simulated annealing-based technique for module placement in such biochips. The placement procedure not only addresses chip area, but it also considers fault tolerance, which allows a microfluidic module to be relocated elsewhere in the system when a single cell is detected to be faulty. Simulation results are presented for a case study involving the polymerase chain reaction.