Multi-layer Optical Coating Antibacterial Layer Nesting
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Solution Overview
Problem
Touch screen panels in portable devices are prone to bacterial and viral contamination due to frequent user interaction, and existing antibacterial coatings often degrade when exposed to external environments and physical contact.
Innovation Solution
An optical coating structure comprising a substrate, an anti-reflective coating layer, a base coating layer, an antibacterial coating layer, and a protective coating layer, where the antibacterial coating layer is strategically positioned between the base and protective layers to prevent direct exposure to external pollutants, using materials like silver or zinc oxide, and optionally combined with a super-hydrophobic or anti-fingerprint coating for enhanced protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the antibacterial coating layer is disposed as an interlayer between the base coating layer and the protective coating layer, then the antibacterial coating maintains its effectiveness by being shielded from external exposure, but the device complexity increases due to the multi-layer structure
Solution Approach 1:
The antibacterial coating layer is nested within the multi-layer coating structure, specifically positioned between the base coating layer and the protective coating layer. This nesting approach protects the antibacterial coating from direct external exposure while maintaining its functional effectiveness, resolving the contradiction between reliability and complexity by integrating the antibacterial function into the existing protective structure rather than adding a separate external layer
Solution Approach 2:
The protective coating layer serves dual functions: it protects the antibacterial coating layer from external exposure and degradation, and simultaneously allows the antibacterial coating to maintain its effectiveness. This multi-functionality approach resolves the contradiction by making the protective layer work for both structural protection and functional preservation
2Ease of manufacture
If the antibacterial coating layer is directly exposed to external environment, then the application process is simpler, but the antibacterial coating degrades when exposed to external pollutants and physical contact
Solution Approach 1:
The protective coating layer is applied in advance over the antibacterial coating layer to create a protective barrier before the device is put into service. This preliminary protective action prevents direct exposure of the antibacterial coating to external pollutants and physical contact, thereby maintaining its durability without significantly complicating the manufacturing process
Solution Approach 2:
The protective coating layer acts as a cushioning barrier that absorbs and mitigates the harmful effects of external pollutants and physical contact before they can reach the antibacterial coating layer. This beforehand cushioning approach protects the antibacterial function while keeping the manufacturing process relatively simple
3Object-affected harmful factors
If super-hydrophobic or anti-fingerprint coating layers are added to the structure, then the device resistance to water and fingerprints is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The super-hydrophobic or anti-fingerprint coating layers are merged with the existing protective coating layer in the multi-layer structure. This combining approach allows the protective layer to simultaneously provide both protection for the antibacterial coating and enhanced resistance to water and fingerprints, thereby improving harmful factor resistance without proportionally increasing device complexity
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
The antibacterial coating maintains its effectiveness by being shielded from external exposure, while the super-hydrophobic or anti-fingerprint coatings improve the device's resistance to water, fingerprints, and wear, ensuring consistent antibacterial performance and enhanced user experience.
Implementation Method 1
an anti-reflective coating layer... disposed on the substrate
Implementation Method 2
the antibacterial coating layer may be formed by a vacuum vapor deposition
Data Source
AI summary
An optical coating structure includes a substrate, an anti-reflective coating layer, a base coating layer, an antibacterial coating layer, and a protective coating layer. The anti-reflective coating layer is disposed on the substrate. The anti-reflective coating layer covers the substrate. The base coating layer covers the anti-reflective coating layer. The antibacterial coating layer is disposed on the base coating layer, and the antibacterial coating layer is an interlayer. The protective coating layer covers the antibacterial coating layer. A super-hydrophobic coating layer or an anti-fingerprint coating layer may cover the protective coating layer.