Bio-compatible Sensor Electrodes with Dual-Layer Conductive Pattern
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing bio-compatible devices with electrochemical sensors face issues due to cracking in the conductive layers, which disrupt the continuous electrical pathway, affecting the functionality of the sensors.
Innovation Solution
A conductive pattern with a first malleable metal layer and a second less malleable metal layer, where the second layer is positioned over the first, forming a continuous electrical pathway and reducing the likelihood of cracking during fabrication, is used in a bio-compatible device for body-mountable applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single conductive layer is used in the sensor electrode, then the device structure is simpler, but the electrical pathway is prone to cracking and discontinuity
Solution Approach 1:
The conductive layer is segmented into multiple distinct layers (first conductive layer with first metal and second conductive layer with second metal), where each layer serves specific functions. This segmentation allows the first layer to provide structural integrity and the second layer to provide surface functionality, resolving the contradiction between reliability and complexity.
Solution Approach 2:
The patent employs composite material structure by combining different metal materials in sequential layers. The first conductive layer uses a metal optimized for adhesion and structural stability, while the second conductive layer uses a different metal optimized for electrochemical performance. This composite approach ensures continuous electrical pathway while maintaining manageable structural complexity.
2Reliability
If a multi-layer conductive structure is used, then the electrical pathway continuity is improved, but the manufacturing process becomes more complex
Solution Approach 1:
The first conductive layer is deposited beforehand to establish a stable, crack-resistant foundation before the second conductive layer is applied. This preliminary action ensures that the underlying structural integrity is established prior to adding functional layers, simplifying the overall manufacturing by preventing defects from propagating through subsequent layers.
Solution Approach 2:
The patent optimizes parameters such as layer thickness, material composition, and deposition conditions for each conductive layer. By carefully controlling these parameters, the multi-layer structure achieves continuous electrical pathways without requiring excessively complex manufacturing processes, balancing reliability with ease of manufacture.
Data Source
AI summary
A method may involve providing a conductive pattern on a bio-compatible layer. The conductive pattern may include a first conductive layer that comprises a first metal and a second conductive layer that comprises a second metal. The second conductive layer may be over the first conductive layer, and the first metal may be more malleable than the second metal. The method may also include mounting an electrical component to the conductive pattern to provide an electrochemical sensor. The electrochemical sensor may be configured for use in a body-mountable device.