BAW Resonator Fluid Port Layout for Faster Analyte Binding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional fluidic devices with bulk acoustic wave resonators face limitations in biosensing and biochemical sensing due to slow diffusion and stratification of analytes in laminar flow, leading to reduced binding rates and extended measurement times.
Innovation Solution
A fluidic device with a bulk acoustic wave resonator structure featuring a functionalized active region and orthogonal fluid flow, where fluid is introduced through a port registered with the active region, promoting mixing and increasing analyte binding, and optionally includes layers like hermeticity, interface, and self-assembled monolayers to enhance binding efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If fluid flows through the device in conventional parallel configuration, then the device structure is simple, but analyte binding rate is slow due to laminar flow and stratification
Solution Approach 1:
The patent introduces orthogonal fluid ports that inject fluid perpendicular to the substrate surface, adding a vertical dimension to the traditionally planar parallel flow configuration. This dimensional change creates intersecting flow paths that disrupt laminar flow stratification and enhance mixing, thereby increasing analyte binding rate without substantially complicating the device structure
Solution Approach 2:
The patent employs hydraulic principles by using orthogonal fluid injection to create controlled flow patterns within the fluidic passage. By injecting fluid perpendicular to the substrate and utilizing flow intersection with parallel flow, the system enhances mixing through hydraulic interactions, improving analyte binding efficiency
2Productivity
If orthogonal fluid flow is introduced through ports registered with active region, then analyte mixing and binding are enhanced, but device structure and fabrication become more complex
Solution Approach 1:
The device is segmented into distinct functional components: parallel flow channels, orthogonal injection ports, and active regions with functionalization materials. This segmentation allows each component to be optimized and fabricated separately using standard techniques, reducing overall fabrication complexity while enabling the beneficial orthogonal flow configuration
Solution Approach 2:
The substrate serves multiple functions: it provides structural support, hosts the acoustic wave resonator, contains the active region with functionalization materials, and defines the fluidic passage geometry. This multi-functionality reduces the number of separate components needed, simplifying fabrication despite the enhanced orthogonal flow configuration
3Reliability
If functionalization material is applied to active region, then specific binding capability is achieved, but measurement time increases due to slow diffusion in laminar flow
Solution Approach 1:
The orthogonal fluid injection creates periodic disruption of the laminar flow pattern, introducing oscillatory mixing actions that enhance mass transport to the functionalization material. This periodic action maintains binding specificity while reducing measurement time by preventing analyte stratification
Solution Approach 2:
The orthogonal fluid flow acts as an intermediary mechanism that enhances mass transport between the analyte-containing fluid and the functionalization material on the active region. This intermediary flow pattern improves diffusion efficiency without compromising the specific binding capability of the functionalization material
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 configuration enhances analyte binding rates and reduces measurement time by promoting mixing near the functionalized active region, improving the efficiency of biosensing and biochemical sensing applications.
Implementation Method 1
An acoustic wave device employs an acoustic wave that propagates through or on the surface of a piezoelectric material, whereby any changes to the characteristics of the propagation path affect the velocity and/or amplitude of the wave
Implementation Method 2
a portion of the piezoelectric material is arranged between the top side electrode and the bottom side electrode to form an active region
Implementation Method 3
Presence of functionalization material embodied in a specific binding material along an active region of an acoustic wave device permits a specific analyte to be bound to the functionalization material, thereby altering the mass being vibrated by the acoustic wave
Implementation Method 4
Conventional fluidic devices with bulk acoustic wave resonators face limitations in biosensing and biochemical sensing due to slow diffusion and stratification of analytes in laminar flow
Data Source
AI summary
A fluidic device includes at least one bulk acoustic wave (BAW) resonator structure with a functionalized active region, and at least one first (inlet) port defined through a cover structure arranged over a fluidic passage containing the active region. At least a portion of the at least one inlet port is registered with the active region, permitting fluid to be introduced in a direction orthogonal to a surface of the active region bearing functionalization material. Such arrangement promotes mixing proximate to a BAW resonator structure surface, thereby reducing analyte stratification, increasing analyte binding rate, and reducing measurement time.