Structurally Reinforced Glucose Sensor for Insertion Durability
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Solution Overview
Problem
Existing glucose sensors face challenges when scaling, particularly in inserting smaller sensors without damaging them, necessitating the need for structural reinforcement to ensure proper insertion and maintenance under the skin.
Innovation Solution
The manufacturing process involves forming a structural backing layer over electrode leads, which includes cutting through a polyimide layer to provide structural support, enhancing the sensor's durability during insertion and operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the sensor is made smaller for better patient comfort and less invasive insertion, then the sensor's structural strength deteriorates, making it prone to damage during insertion
Solution Approach 1:
The patent applies composite materials by combining a flexible substrate with a separate structural backing layer. The sensor comprises a substrate containing electrodes and a distinct structural backing layer that provides mechanical strength and rigidity. This composite structure allows the sensor to maintain small size for patient comfort while the backing layer compensates for the reduced structural strength that would otherwise result from miniaturization.
Solution Approach 2:
The patent segments the sensor structure into functionally distinct layers: a flexible substrate containing the electrochemical sensing elements and a separate structural backing layer providing mechanical support. This segmentation allows each layer to be optimized independently - the substrate for sensing functionality and miniaturization, and the backing layer for structural strength and insertion durability.
2Volume of moving object
If the sensor is made smaller for less invasive insertion, then the difficulty of insertion increases due to lack of structural support
Solution Approach 1:
The composite structure of a flexible substrate combined with a rigid structural backing layer enables the sensor to maintain small dimensions for less invasive insertion while the backing layer provides the necessary structural support to facilitate easy insertion and proper positioning under the skin.
Solution Approach 2:
The patent applies local quality by providing structural reinforcement specifically at the backing layer rather than uniformly throughout the entire sensor. This localized structural support at the critical insertion interface enables ease of insertion without compromising the miniaturized design, while the flexible substrate maintains its compact form factor.
3Strength
If a structural backing layer is added to reinforce the sensor, then the sensor's structural strength improves, but the device complexity increases
Solution Approach 1:
The patent segments the sensor into a substrate layer and a separate structural backing layer, allowing the backing layer to be added as a distinct component. This segmentation provides structural strength enhancement while maintaining manufacturing simplicity through modular fabrication processes where the backing layer can be formed and attached separately.
Solution Approach 2:
The structural backing layer serves multiple functions simultaneously: it provides mechanical strength and rigidity, facilitates insertion by maintaining sensor geometry, and can be integrated with existing manufacturing processes. This multi-functionality justifies the added structural layer without proportionally increasing overall device complexity.
Data Source
AI summary
A sensor having a distal end and an intermediate region adjacent to the distal end is provided. The sensor includes an insulator base substrate, sensor electrodes over the insulator base substrate, an electrode lead pattern over the insulator base substrate, wherein the electrode lead pattern includes electrode leads configured for contact with the sensor electrodes, and wherein the electrode leads extend completely across the intermediate region in a longitudinal direction, and a structural backing layer over the electrode lead pattern and insulator base substrate; wherein a side edge of the structural backing layer over the electrode lead pattern extends completely across the structural backing layer in the longitudinal direction.