Iridium Oxide Electrode Coating via Organic Precursor Decomposition
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Solution Overview
Problem
Existing medical electrode manufacturing techniques using iridium oxide coatings are complex and expensive, and do not allow for maskless location-selective coating, particularly on temperature-sensitive substrates.
Innovation Solution
A method involving the application of a liquid composition containing an organic iridium complex compound to a medical electrode surface, followed by heating in an oxygen-containing atmosphere to form an iridium oxide layer, which can be done at lower temperatures and pressures, enabling flexible and cost-effective production of iridium oxide layers in various shapes without the need for specialized masks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vacuum-based techniques are used to coat medical electrodes with iridium oxide, then a coating can be formed, but the process becomes complex and expensive
Solution Approach 1:
The patent replaces vacuum-based physical deposition techniques with a chemical solution-based approach. The iridium oxide coating is formed by applying a liquid composition containing iridium precursors followed by thermal treatment, eliminating the need for complex vacuum equipment and processes while achieving reliable coating results.
Solution Approach 2:
The invention changes the fundamental parameters of the coating process from vacuum-based physical deposition to atmospheric chemical deposition. By using liquid compositions that can be applied at atmospheric pressure and cured through thermal treatment, the process becomes simpler and more cost-effective while maintaining coating quality.
2Reliability
If vacuum-based techniques are used for iridium oxide coating, then coating can be achieved, but maskless location-selective coating is not possible
Solution Approach 1:
The patent enables location-selective coating by applying the liquid composition only to specific areas of the electrode surface where coating is desired. This can be achieved through various application methods such as printing, spraying, or dipping specific regions, allowing precise control over where the iridium oxide layer forms without requiring masks.
Solution Approach 2:
The invention allows the electrode pattern to serve as its own mask by applying the liquid composition in a way that naturally follows the electrode geometry. The composition can be selectively applied to match the electrode trace patterns, eliminating the need for separate masking layers or alignment processes.
3Reliability
If conventional coating methods are used, then iridium oxide layers can be formed, but temperature-sensitive substrates cannot be processed
Solution Approach 1:
The patent modifies the coating process to use lower curing temperatures that are compatible with temperature-sensitive substrates. By optimizing the liquid composition formulation and using atmospheric pressure processing, the thermal treatment required to form the iridium oxide layer can be performed at temperatures that do not damage sensitive substrate materials.
4Manufacturing precision
If specialized masks are used for selective coating, then location-specific patterns can be achieved, but device complexity and cost increase
Solution Approach 1:
The invention eliminates the need for separate masking layers by using the electrode pattern itself as the template for coating. The liquid composition is applied in a manner that naturally conforms to the electrode geometry, allowing the electrode trace pattern to define the coating areas without requiring additional masking materials or alignment systems.
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 method allows for the production of medical electrodes with improved electrical properties, such as reduced impedance and increased charge storage capacity, while being compatible with temperature-sensitive substrates and offering a more economical and versatile coating process.
Implementation Method 1
heating the composition in an oxygen-containing atmosphere, thereby forming an iridium oxide layer on the electrode surface
Implementation Method 2
heating the composition in an oxygen-containing atmosphere, thereby forming an iridium oxide layer
Data Source
AI summary
The invention relates to a method for producing a medical electrode, comprising the following steps: (i) providing a substrate; (ii) applying a composition onto the substrate, wherein the composition comprises (a) a non-aqueous solvent and (b) an organic iridium complex compound dissolved in the solvent; (iii) heating the composition, and thereby forming a noble metal layer on the substrate.