Microfluidic Detection Chip With Membrane Valves for Precise Reagent Delivery
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Solution Overview
Problem
Microfluidic chips face challenges with complex structures, high costs, and inaccurate reagent delivery, leading to increased complexity and cost in multiple detection processes, along with potential reagent leakage during transportation.
Innovation Solution
A detection chip with a stacked chip substrate and sealing film design, featuring membrane valve portions that allow controlled opening and closing of fluid channels, enabling quantitative reagent delivery and multiple detection capabilities, while improving heat conduction and optical detection stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional microfluidic chip structures are used to achieve multiple detection capabilities, then the detection functionality is improved, but the structural complexity and production cost increase significantly
Solution Approach 1:
The chip is divided into multiple independent detection regions, each capable of performing separate detection functions. The fluid channel system is segmented into multiple branches with independent control, allowing each detection unit to operate autonomously while sharing common reagent reservoirs, thereby achieving multiple detections without proportionally increasing overall complexity
Solution Approach 2:
The chip design incorporates universal components that serve multiple functions: a single reagent reservoir can supply multiple detection regions, and the fluid channel structure can route fluids to different detection units. This multi-functional design enables the chip to perform various detection tasks using a unified platform, reducing the need for separate specialized structures for each detection type
2Adaptability or versatility
If traditional microfluidic chip structures are used to achieve multiple detection capabilities, then the detection functionality is improved, but the production cost increases
Solution Approach 1:
Multiple detection functions are merged into a single integrated chip structure rather than using separate chips for each detection type. The chip combines multiple detection regions, fluid channels, and reagent reservoirs into one manufacturable unit, allowing for economies of scale in production and reducing the total cost of implementing multiple detection capabilities
Solution Approach 2:
The chip employs universal design elements that can be manufactured using standard microfabrication processes. By designing the chip with reusable components and standardized structures that serve multiple functions, the manufacturing complexity is reduced, leading to lower production costs while maintaining multiple detection capabilities
3Manufacturing precision
If membrane valve portions are added to control fluid channels, then reagent delivery precision is improved, but the chip structure becomes more complex
Solution Approach 1:
The membrane valves are constructed using thin flexible films that can be deformed to control fluid flow. These thin-film structures are integrated directly into the chip substrate rather than being separate components, allowing for precise reagent delivery through controlled membrane deformation while minimizing the increase in overall structural complexity
Solution Approach 2:
The membrane valves act as intermediary elements between the fluid channels and the control mechanism. By using the membrane as a flexible intermediary that can be deformed by pressure or actuation, the system achieves precise reagent delivery without requiring complex mechanical valve structures, thus balancing precision with structural simplicity
4Temperature
If stacked chip substrate and sealing film design is used, then heat conduction and optical detection stability are improved, but the manufacturing process becomes more complex
Solution Approach 1:
The chip is constructed as a stacked assembly of separate components including the chip substrate, sealing film, and other functional layers. This segmented design allows each layer to be manufactured independently using optimized processes, then assembled through alignment and bonding. The stacking structure improves heat conduction pathways and optical detection stability while keeping individual manufacturing steps relatively simple
Solution Approach 2:
The stacked design combines different materials with complementary properties: the chip substrate provides mechanical support and heat conduction, while the sealing film provides fluid containment and optical transparency. This composite structure leverages the strengths of each material to achieve improved heat conduction and optical stability without requiring complex processing of a single monolithic 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
The chip achieves simplified structure, reduced production costs, precise reagent delivery, enhanced heat conduction, and improved optical detection accuracy, while preventing reagent leakage during transportation.
Implementation Method 1
the first sealing film is an elastic film
Data Source
AI summary
A detection chip, a method for using a dejection chip, and a detection device are provided. The detection chip includes a chip substrate and a first sealing film that are stacked. The chip substrate includes a first surface, and the first sealing film covers the first surface of the chip substrate. The chip substrate further includes a fluid channel on the first surface, and the fluid channel includes a plurality of membrane valve portions. The membrane valve portions are configured to allow a portion of fee first sealing film covering the membrane valve portions to approach and separate, so as to close and open the fluid channel correspondingly.