Disposable Microfluidic PCR Chips with Glass Substrates
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Solution Overview
Problem
Current microfluidic diagnostic devices face challenges in cost-effectiveness and sample preparation, with reusable chips risking cross-contamination and being made from materials that are not chemically inert, thermally stable, or optically transparent enough for diagnostic applications.
Innovation Solution
A microfluidic device with parallel processing channels, compatible with qPCR processes, featuring wells arranged like industry standard multiwell plates for easy integration with liquid handling equipment, and using conductive polymer electrodes for electrical control, allowing for independent reactions and efficient PCR amplification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If reusable microfluidic chips are used to reduce cost, then manufacturing cost decreases, but cross-contamination risk increases and reliability deteriorates
Solution Approach 1:
The patent employs disposable microfluidic chips that are discarded after a single use, eliminating cross-contamination risks associated with reusable chips while maintaining cost-effectiveness through inexpensive single-use design. The chip is intended for one-time use only and is disposed of after the assay is complete.
2Ease of manufacture
If conventional microfluidic materials are used, then ease of manufacture improves, but chemical inertness and thermal stability deteriorate
Solution Approach 1:
The patent employs a composite structure consisting of a polymeric microfluidic chip body combined with a separate glass slide substrate. The glass slide provides the required chemical inertness and thermal stability for PCR applications, while the polymeric chip enables ease of manufacture and integration of microfluidic features. This composite approach allows the device to meet both manufacturing and performance requirements.
3Adaptability or versatility
If complex channel networks are used to perform complete analyses, then functionality increases, but device complexity increases
Solution Approach 1:
The patent divides the microfluidic chip into distinct functional zones including separate reaction chambers, heating elements, and detection regions. The chip is designed with modular functional segments that can be independently controlled and optimized, allowing complex analyses to be performed through coordinated operation of simpler subsystems rather than requiring a single complex integrated structure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables cost-effective, efficient PCR amplification and analyte detection with reduced risk of cross-contamination, using materials that are chemically inert and thermally stable, and compatible with automated processing systems.
Implementation Method 1
The heating element is formed on the plate and heats that portion of the microfluidic PCR circuit
Implementation Method 2
using conductive polymer electrodes for electrical control
Data Source
AI summary
Embodiments of the invention comprise microfluidic devices, instrumentation interfacing with those devices, processes for fabricating that device, and methods of employing that device to perform PCR amplification. Embodiments of the invention are also compatible with quantitative Polymerase Chain Reaction (“qPCR”) processes. Microfluidic devices in accordance with the invention may contain a plurality of parallel processing channels. Fully independent reactions can take place in each of the plurality of parallel processing channels. The availability of independent processing channels allows a microfluidic device in accordance with the invention to be used in a number of ways. For example, separate samples could be processed in each of the independent processing channels. Alternatively, different loci on a single sample could be processed in multiple processing channels.