Microfluidic Chip Manifold Assembly for High-Pressure Sealing
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Solution Overview
Problem
Existing microfluidic systems face challenges in maintaining high-pressure sealing and minimizing chip cracking under extreme conditions, particularly in applications like oil and gas research, where pressures exceed 300 bar.
Innovation Solution
A microfluidic assembly comprising a base, cover, and jack that sandwiches the microfluidic chip, using a hydraulic jack to apply at least 5 tons of force, creating a high confining pressure and sealing the chip with a seal compressed between the base and cover, allowing fluid communication while enabling optical access through a viewing window.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional microfluidic devices use separate tubing and syringe pumps for fluid delivery, then fluid control is achievable, but device complexity and potential sources of error increase
Solution Approach 1:
The patent integrates the fluid reservoir, pumping mechanism, and channel system into a single monolithic manifold structure. The reservoir forms an integral part of the manifold body, eliminating the need for separate tubing connections and external syringe pumps, thereby reducing device complexity while maintaining fluid control reliability.
Solution Approach 2:
The manifold structure serves multiple functions simultaneously: it acts as the fluid reservoir, the pumping mechanism (through its geometry and pressure distribution), and the channel network. This multi-functionality eliminates the need for separate components, reducing overall device complexity while ensuring reliable fluid delivery.
2Ease of manufacture
If conventional devices use multiple separate components (tubing, pumps, manifolds), then assembly is flexible, but assembly time and potential leak points increase
Solution Approach 1:
By combining the reservoir, pumping structure, and channel manifold into a single integrated component, the patent eliminates multiple assembly steps and potential leak points associated with connecting separate tubing and components, significantly reducing assembly time while maintaining manufacturing ease through standardized fabrication processes.
3Manufacturing precision
If conventional manifolds require precise alignment of multiple components, then fluid path precision is achieved, but manufacturing precision requirements increase
Solution Approach 1:
The integration of all fluid path components into a single monolithic manifold structure eliminates alignment issues between separate components. The fluid paths are formed directly within the manifold body, ensuring precise fluid paths without the need for complex alignment procedures, thereby reducing device complexity while maintaining high manufacturing precision.
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3A~3D
AI summary
A microfluidic assembly includes a jack for forcing a base and a cover together to sandwich a microfluidic chip between base and the cover, with the base and the cover bearing against the microfluidic chip to apply a confining pressure to the microfluidic chip, and with a seal compressed between the microfluidic chip and the base to seal a fluid channel of the base in fluid communication with a microfluidic inlet of the microfluidic chip. A microfluidic chip includes a silicon wafer having at least a first microfluidic channel etched therein, and a chemically strengthened glass panel bonded to the silicon wafer to cover the microfluidic channel.