Primer Layer Composition for Adhesion Across Mixed Substrates
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Solution Overview
Problem
Existing photosensitive compositions used in semiconductor and display panel production face issues with insufficient adhesion to substrates, particularly when substrates lack a silanol group on their surface, leading to potential peeling.
Innovation Solution
A primer composition containing a base material component (A) and a compound (B) with specific functional groups, applied between the substrate and a cured product layer, forms a covalent bond with the photocurable compound, enhancing adhesion regardless of substrate type.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a silane coupling agent is used to improve adhesion, then adhesion is improved, but it can be applied only to substrates having a silanol group on the surface
Solution Approach 1:
The patent introduces a primer composition as an intermediary layer between the substrate and the photosensitive composition. This primer contains a polyol compound and a carboxylic acid compound that react to form a crosslinked structure, serving as a universal adhesion promoter that works on various substrate types regardless of whether they have silanol groups, thereby resolving the substrate compatibility limitation while maintaining strong adhesion
Solution Approach 2:
The patent changes the chemical composition parameters of the adhesion promoter from a specific silane coupling agent to a primer composition containing polyol and carboxylic acid compounds. This parameter change allows the system to achieve broad substrate compatibility while maintaining effective adhesion through crosslinking reactions
2Strength
If a silane coupling agent is used to improve adhesion, then adhesion is improved, but a substrate having a silanol group may not provide a sufficient effect depending on the amount of the silanol group
Solution Approach 1:
The primer composition acts as an intermediary that does not depend on the substrate's silanol group content. The polyol compound in the primer forms crosslinks with the photosensitive composition, providing consistent adhesion performance regardless of variations in substrate surface chemistry, thereby ensuring adhesion reliability
3Stability of the object's composition
If a base material component is used that does not form a covalent bond with the photocurable compound, then the base material provides structural support, but adhesion between the substrate and cured product layer is insufficient
Solution Approach 1:
The patent creates a composite primer composition combining a polyol compound (base material providing structural support) with a carboxylic acid compound (providing crosslinking capability). This composite material simultaneously achieves base material stability and strong adhesion through the crosslinked network formed between the two components and the photosensitive composition
Solution Approach 2:
The patent merges the functions of structural support (polyol compound) and adhesion promotion (carboxylic acid compound) into a single primer composition. The combination allows the base material to maintain stability while the crosslinking reaction provides sufficient adhesion 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 primer composition improves adhesion between the substrate and the cured product layer, ensuring uniformity and stability of the laminate, even on substrates without silanol groups.
Implementation Method 1
the compound (B) having a functional group capable of forming a covalent bond by a reaction with the ethylenic unsaturated double bond-containing group in the photocurable compound (a)
Implementation Method 2
the polymerizable compound (A2) being a compound polymerizable by a polymerization mechanism other than radical polymerization
Data Source
AI summary
Provided is a primer composition capable of improving adhesion between a substrate and a cured product layer formed of a cured product of a photosensitive composition regardless of a type of the substrate, a laminate including a primer layer derived from the primer composition, and a method for producing the laminate. The primer composition contains a base material component (A), a compound (B), and a solvent(S), the base material component (A) contains a resin (A1) and/or a polymerizable compound (A2), the polymerizable compound (A2) is a compound polymerizable by a polymerization mechanism other than radical polymerization, and the compound (B) has a functional group capable of forming a covalent bond by a reaction with an ethylenic unsaturated double bond-containing group in a photocurable compound (a) in a photosensitive composition.