Flow Cell Hydrophobic Guide Structure for Fluid Pinning
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Solution Overview
Problem
Existing flow cells struggle with materials spreading into undesired regions, leading to fluid mixing and compromised bonding in active areas, which affects the accuracy and versatility of fluidic control during reactions.
Innovation Solution
The implementation of hydrophobic fluid guides and fluidic pinning structures within flow cells, utilizing hydrophobic barriers and depressions to maintain materials within active regions and prevent spreading into inactive areas, ensuring precise fluid flow and bonding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If hydrophobic fluid guides and fluidic pinning structures are implemented, then fluidic control accuracy and material containment are improved, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical fluid control mechanisms with hydrophobic fluid guides that utilize surface chemistry properties. The hydrophobic barriers and fluidic pinning structures use inherent wetting properties of materials to control fluid flow, eliminating the need for mechanical valves or pumps and reducing device complexity while maintaining precise fluidic control.
Solution Approach 2:
The patent changes the surface energy parameters of specific regions within the flow cell by incorporating hydrophobic materials. This parameter change creates regions with different wettability characteristics that naturally guide and contain fluids without additional mechanical structures, achieving precise fluidic control through material property modification rather than structural complexity.
2Reliability
If hydrophobic barriers are used to prevent material spreading, then bonding quality in active areas is improved, but the structure becomes more complex
Solution Approach 1:
The patent applies local quality by creating specific hydrophobic regions at boundaries between active and inactive areas. Rather than making the entire structure complex, only specific localized regions incorporate hydrophobic barriers, providing targeted bonding protection where needed while keeping the rest of the structure simple and easy to manufacture.
3Measurement precision
If fluidic pinning structures are implemented to maintain materials in active regions, then reaction accuracy is improved, but manufacturing complexity increases
Solution Approach 1:
The patent replaces complex mechanical positioning systems with fluidic pinning structures that utilize surface chemistry. The hydrophobic barriers and pinning regions use inherent capillary and wetting properties to automatically position and contain materials in active regions, achieving high reaction accuracy through passive chemical forces rather than active mechanical control, thereby simplifying manufacturing.
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
This approach enhances the accuracy and versatility of fluidic flow in flow cells by preventing material mixing and improving bonding, facilitating controlled reactions and analysis.
Implementation Method 1
a hydrophobic barrier positioned over at least the plurality of second depressions, wherein the hydrophobic barrier includes a hydrophobic polymer
Data Source
AI summary
An example of a flow cell includes a substrate having an active region that is directly adjacent to an inactive region. The active region includes a hydrophilic material disposed within a plurality of first depressions that are separated by first interstitial regions. The inactive region includes a fluidic pinning region that is directly adjacent to the active region. The inactive region further includes a plurality of second depressions that are separated by second interstitial regions, wherein at least some of the plurality of second depressions are directly adjacent to the fluidic pinning region. The inactive region still further includes a hydrophobic barrier positioned over at least the plurality of second depressions. The hydrophobic barrier includes a hydrophobic polymer.