Analyte Sensor Electrodes With Fluid Barriers for Uniform Sensing Structures
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Solution Overview
Problem
Existing in vivo analyte monitoring systems face challenges in manufacturing sensing elements with high accuracy and reduced sensor-to-sensor variation.
Innovation Solution
Electrochemical analyte sensors with a fluid barrier perimeters, such as an electrode that includes specific structures, each delimited by a fluid barrier perimeter to control the spread of applied analyte sensing solution during manufacturing, ensuring uniform diameters and reducing sensing structure and electrode variation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional manufacturing methods are used for sensing elements, then production is simpler and faster, but sensor-to-sensor variation increases and accuracy decreases
Solution Approach 1:
The electrode is segmented into distinct functional regions including a sensing structure region, a fluid barrier region, and a reference electrode region. The fluid barrier acts as a segmented boundary that separates the sensing structure from surrounding areas, controlling the spread of sensing solution and ensuring uniform distribution within defined zones. This segmentation enables precise control over sensing element geometry and reduces variation between sensors.
Solution Approach 2:
The fluid barrier is formed preliminarily during the electrode manufacturing process before the sensing solution is applied. By pre-defining the boundaries and geometry of the sensing structure region, the manufacturing process ensures that subsequent sensing solution deposition remains confined to specific areas, achieving uniform diameters and consistent sensing element characteristics across all sensors.
2Manufacturing precision
If sensing solution is applied without fluid barrier control, then application is simpler, but spread and variation of sensing structure diameter increases
Solution Approach 1:
The fluid barrier provides local quality control by creating distinct zones with different properties. The sensing structure region is locally defined with specific boundary characteristics that control sensing solution confinement, while other regions of the electrode maintain different characteristics. This local differentiation ensures uniform sensing structure diameter without complicating the overall manufacturing process.
3Manufacturing precision
If multiple sensing structures are present without individual barriers, then electrode design is simpler, but structure-to-structure variation increases
Solution Approach 1:
Each sensing structure on the electrode is associated with its own fluid barrier perimeter, creating segmented zones that independently control the sensing solution distribution for each sensing element. This segmentation ensures that variations in one sensing structure do not affect others, achieving structure-to-structure uniformity while maintaining a systematic electrode design.
Data Source
AI summary
An analyte sensor comprising: a non-conductive material; a conductive material disposed on the non-conductive material; and at least two sensing structures defined by a removed portion of the conductive material, the at least two sensing structures comprising a reagent composition.