Light Reflection Layer Composition Reducing Curing Shrinkage
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Solution Overview
Problem
Curing shrinkage of a light reflection layer in existing technologies causes stress on the edge of a base substrate, leading to warpage, which hinders subsequent assembly and adsorption processes.
Innovation Solution
A composition comprising a matrix material with reactant molecules capable of cross-linking and a filler material that blocks cross-linking reactions between adjacent reactant molecules, reducing the number of connections and stress during curing, thereby minimizing warpage. The filler material is dispersed in the matrix and added in controlled amounts to buffer the stress caused by cross-linking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If cross-linking reaction occurs between adjacent reactant molecules to form light reflection layer, then adhesion and attachment are improved, but curing shrinkage causes stress and warpage on base substrate
Solution Approach 1:
The patent changes the chemical composition parameters by introducing filler materials (silicon dioxide, silicate, metal oxide, titanium dioxide, calcium carbonate, or cellulose) at controlled concentrations (0.1%-5% mass ratio). These fillers modify the cross-linking density and shrinkage characteristics of the reactant molecules, reducing curing stress while maintaining adhesion strength.
Solution Approach 2:
The patent creates a composite light reflection layer by combining reactant molecules with filler materials. The composite structure allows the fillers to act as spacers that reduce cross-linking density and buffering agents that absorb shrinkage stress, thereby preventing warpage while preserving the adhesive properties of the matrix material.
2Shape
If filler material is added to block cross-linking reactions, then warpage is reduced, but adhesion and attachment may be compromised
Solution Approach 1:
The patent optimizes the concentration parameters of filler materials to 0.1%-5% mass ratio, which is sufficient to block excessive cross-linking and reduce warpage, while remaining low enough to preserve the adhesive network formed by reactant molecules. This precise parameter control resolves the contradiction between reducing warpage and maintaining adhesion.
3Strength
If cross-linking density is increased to improve film formation, then film strength is improved, but stress and warpage increase
Solution Approach 1:
The patent introduces filler materials as composite components that physically separate reactant molecules, reducing cross-linking density and curing stress. Simultaneously, the fillers provide structural support that maintains film strength, thereby resolving the contradiction between film strength and curing stress.
Solution Approach 2:
The patent modifies the cross-linking density parameter by controlling filler material concentration (0.1%-5%), which reduces the number of cross-linking points per unit volume. This parameter change decreases curing stress while the fillers themselves provide structural integrity to maintain film strength.
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 effectively reduces warpage and stress in the light reflection layer, ensuring better adhesion and attachment while maintaining the reflection properties, improving the reliability and yield of the product.
Implementation Method 1
the reactant molecules is capable of undergoing cross-linking reaction under a first preset condition
Implementation Method 2
a material with reflection function dispersed in the solvent
Data Source
AI summary
The present disclosure relates to a composition, a substrate and a preparation method of a light reflection layer. The composition comprises: a matrix material and an additive, the matrix material including a solvent, reactant molecules and a material with reflection function dispersed in the solvent, wherein the reactant molecules is capable of undergoing cross-linking reaction under a first preset condition, and include monomer molecules and/or prepolymer molecules; the additive including a filler material that is in the form of powder or microspheres, capable of being dispersed in the matrix material, and filled between the crosslinking points of any adjacent reactant molecules to block the crosslinking reaction of some adjacent reactant molecules under the first preset condition.