Multi-Layer Epoxy Barrier Coating for UV-Protected Electrical Assemblies
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Solution Overview
Problem
Existing epoxy coatings fail to provide adequate protection against both mechanical damage and light-induced degradation, particularly from ultraviolet light, in electrical assemblies.
Innovation Solution
A multi-layer barrier layer comprising a first epoxy layer, a second amber resin layer, and optionally a third epoxy layer, where each layer is applied and cured using UV light or thermal methods, providing enhanced tensile strength and light-blocking properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional epoxy coatings are used to protect electrical assemblies, then mechanical protection is provided, but protection from light damage (particularly UV light) is insufficient
Solution Approach 1:
The patent applies composite materials by combining multiple epoxy layers with different properties: a first epoxy layer (white, black, or clear) for mechanical protection and adhesion, and a second amber resin layer for UV light blocking. This composite structure resolves the contradiction by providing both mechanical strength and light protection, making the electrical assembly reliable against both mechanical damage and photodegradation.
Solution Approach 2:
The patent applies local quality by assigning different functional properties to different layers of the coating system. The first epoxy layer is optimized for mechanical protection and substrate adhesion, while the second amber resin layer is specifically designed to block UV light. Each layer performs its specialized function locally, collectively providing comprehensive protection against both mechanical and light-induced damage.
2Strength
If traditional epoxy coatings are used, then application is simple, but tensile strength is inadequate for sufficient mechanical protection
Solution Approach 1:
The patent uses composite materials with two distinct epoxy layers, where the first layer provides foundational adhesion and the second amber resin layer contributes high tensile strength (at least 55 MPa). This composite approach achieves superior mechanical strength while maintaining reasonable structural complexity through systematic layering rather than developing a single complex material.
Solution Approach 2:
The patent segments the protective coating into multiple functional layers: a first epoxy layer for base protection and adhesion, and a second amber resin layer for enhanced tensile strength and UV protection. This segmentation allows each layer to be optimized for its specific function, achieving high overall tensile strength while keeping the manufacturing process manageable through sequential application.
3Reliability
If a multi-layer barrier system is implemented to provide both light and mechanical protection, then protection effectiveness is improved, but manufacturing process complexity increases
Solution Approach 1:
The patent segments the protective function into two separately applied epoxy layers with distinct purposes. The first layer is applied and cured, then the second amber resin layer is applied and cured. This segmentation enables comprehensive protection against both light and mechanical damage while maintaining ease of manufacture through a systematic, sequential process that is easier to control than developing a single complex multi-functional material.
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 barrier layer effectively protects electrical components from mechanical damage and light-induced degradation, maintaining sensor accuracy and performance while reducing material costs.
Implementation Method 1
The first layer can be cured with ultraviolet (UV) light
Implementation Method 2
The second epoxy can include an amber resin
Implementation Method 3
The method can include curing the second layer with UV light, thermally, or with a reflow curing technique
Data Source
AI summary
An electrical device including an electrical assembly and a barrier layer. The electrical assembly includes a substrate and an electrical component that is coupled to the substrate. The electrical component is positioned between the substrate and the barrier layer. The barrier layer includes a first layer that includes a first epoxy and a second layer that includes a second epoxy that is different than the first epoxy. The first layer is positioned between the electrical component and the second layer. The second epoxy includes an amber resin.