Reaction Curable Composition Antireflection Filler Viscosity Control
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Solution Overview
Problem
Existing reaction curable compositions fail to effectively suppress specular reflection of light from the surface of cured materials, particularly in applications like camera modules, due to increased viscosity and difficulty in controlling surface unevenness, and require additional processing steps or complex layered structures.
Innovation Solution
A reaction curable composition containing a reactive component and an antireflection filler with a specific particle size and projection structure, which scatters light and reduces specular reflection without increasing viscosity, allowing for effective antireflection performance in both visible and near-infrared ranges without additional processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional fillers are used to suppress light reflection, then specular reflectance is reduced, but viscosity increases and surface unevenness becomes difficult to control
Solution Approach 1:
The invention changes the particle size parameter of the filler to a specific range (0.3 μm to 3 μm) and introduces a surface projection structure with specific dimensions (mean diameter 100 nm to 500 nm). These parameter changes enable effective light scattering while maintaining manageable viscosity and surface flatness, resolving the contradiction between reducing specular reflectance and controlling manufacturing parameters.
2Object-affected harmful factors
If additional processing steps or complex layered structures are implemented, then antireflection performance is improved, but device complexity increases
Solution Approach 1:
The invention enables the composition itself to provide antireflection functionality through the specific filler characteristics, eliminating the need for additional post-processing steps or complex layered structures. The filler particles with projections automatically scatter light when incorporated into the cured material, allowing the material to serve its own antireflection needs without external intervention.
3Ease of manufacture
If filler particle size is increased to reduce viscosity, then flowability is improved, but surface unevenness increases
Solution Approach 1:
The invention introduces surface projections on the filler particles with specific local characteristics (mean diameter 100 nm to 500 nm) that create light scattering centers. This local structural modification allows the use of larger particles for viscosity control while the projections themselves provide the antireflection function, preventing surface unevenness from degrading optical performance.
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 composition achieves significant reduction in specular reflectance and maintains good flowability and impact resistance, making it suitable for applications like camera modules and image sensors without the need for post-processing or complex layered structures.
Implementation Method 1
particles of the antireflection filler (B1) each have a surface having a plurality of projections... scatter light and reduces specular reflection
Data Source
AI summary
A reaction curable composition according to an aspect of the present disclosure contains a reactive component (A) and a filler (B). The filler (B) contains an antireflection filler (B1). The antireflection filler (B1) has an average particle size of greater than or equal to 0.8 μm and less than or equal to 10 μm, and particles of the antireflection filler (B1) each have a surface having a plurality of projections. A mean diameter of the plurality of projections is greater than or equal to 100 nm and less than or equal to 500 nm.