Antireflection Film Adhesion Layer for Abrasion Resistance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing antireflection films with fine uneven structures or metal-dielectric laminates lack durability and abrasion resistance, making them unsuitable for applications where mechanical strength is required, such as camera lenses.
Innovation Solution
An antireflection film with a silver-containing metal layer, a multilayer interlayer of alternating high and low refractive index layers, and a dielectric layer including silicon-containing oxide, magnesium fluoride, and an adhesion layer to enhance adhesiveness and durability, laminated in a specific order on a substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If an antireflection film with a fine uneven structure or porous structure is used to achieve ultra-low reflectivity, then the antireflection performance is improved, but the mechanical strength and abrasion resistance deteriorate
Solution Approach 1:
The patent uses a composite structure combining a metal layer containing silver (50-90 atomic %) with dielectric layers having different refractive indices. This composite material approach achieves ultra-low reflectivity (0.2% or less) across the visible spectrum while maintaining mechanical strength and abrasion resistance, as the metal-dielectric laminate provides both optical functionality and structural durability without requiring fragile fine uneven or porous structures.
2Loss of energy
If a metal layer containing silver is provided between dielectric layers to achieve lower reflectivity, then the antireflection performance is improved, but the abrasion resistance is insufficient
Solution Approach 1:
The patent employs a multi-layer composite structure where a metal layer containing silver (50-90 atomic %) is sandwiched between dielectric layers with different refractive indices. This composite configuration achieves ultra-low reflectivity (0.2% or less) while the outer dielectric layers provide protective functionality that improves abrasion resistance compared to exposed metal surfaces.
Solution Approach 2:
The dielectric layers act as protective thin film shells covering the metal layer, providing mechanical protection and abrasion resistance while maintaining the optical antireflection properties. The layered film structure allows the metal layer to be protected from direct exposure to external forces.
3Loss of energy
If a fine uneven structure or porous structure is used on the uppermost layer to achieve low reflectivity, then the optical performance is improved, but the film becomes very weak to external force such as wiping
Solution Approach 1:
The patent replaces fragile fine uneven or porous structures with a robust metal-dielectric laminate composite. The metal layer containing silver (50-90 atomic %) combined with dielectric layers provides both ultra-low reflectivity (0.2% or less) and high resistance to external forces such as wiping, eliminating the weakness of surface-structured films.
Solution Approach 2:
The invention avoids using fragile structures that are sensitive to external forces by employing a durable metal-dielectric laminate that can withstand mechanical stress, wiping, and handling, making it suitable for practical applications where the film must endure regular use.
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 solution provides high durability and improved abrasion resistance while maintaining excellent antireflection performance, suitable for applications where mechanical strength is essential, such as camera lenses.
Implementation Method 1
an adhesion layer provided between the silicon-containing oxide layer and the magnesium fluoride layer and configured to increase adhesiveness between the silicon-containing oxide layer and the magnesium fluoride layer
Implementation Method 2
the interlayer is a multilayer film having at least two layers in which a layer of high refractive index having a relatively high refractive index and a layer of low refractive index having a relatively low refractive index are alternately laminated
Implementation Method 3
a layer of high refractive index having a relatively high refractive index and a layer of low refractive index having a relatively low refractive index
Data Source
AI summary
An antireflection film is provided on a substrate and includes an interlayer, a silver-containing metal layer containing silver, and a dielectric layer, which are laminated in this order on a side of a substrate, in which the interlayer is a multilayer film having at least two layers in which a layer of high refractive index having a relatively high refractive index and a layer of lower refractive index having a relatively low refractive index are alternately laminated, the dielectric layer has a surface exposed to air, and the dielectric layer is a multilayer film including a silicon-containing oxide layer, a magnesium fluoride layer, and an adhesion layer provided between the silicon-containing oxide layer and the magnesium fluoride layer and configured to increase adhesiveness between the silicon-containing oxide layer and the magnesium fluoride layer.