Photocurable Ink Composition for Adhesion and Ion Migration
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Solution Overview
Problem
The existing photocurable inkjet inks used for forming films on electronic components are insufficient in adhesiveness to inorganic base materials and ion migration resistance, particularly in thin-film applications where ion migration can lead to short circuits.
Innovation Solution
A photocurable composition comprising a specific ratio of monofunctional acrylic monomer, polyfunctional acrylic monomer, and a hydroxyl value adjusting agent, which adjusts the hydroxyl value of the composition to 1 to 100 mgKOH/g, enhancing adhesiveness and ion migration resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If photocurable resin is used as coating agent, then surface hardness and productivity are improved, but adhesiveness to inorganic base material deteriorates
Solution Approach 1:
The patent uses a composite photocurable resin system combining multiple resin components (epoxy resin, polyester resin, and acrylic resin) with specific functional additives. This composite formulation achieves both high surface hardness and strong adhesiveness to inorganic substrates by synergistically combining the properties of different resin types and additives.
Solution Approach 2:
The patent optimizes specific parameter ranges including hydroxyl value (5-100 mgKOH/g), carboxyl value (5-50 mgKOH/g), and resin composition ratios to simultaneously achieve high surface hardness and good adhesiveness. By precisely controlling these chemical parameters, the coating resolves the contradiction between hardness and adhesion.
2Productivity
If conventional photocurable inkjet ink is used, then productivity is improved, but ion migration resistance deteriorates
Solution Approach 1:
The patent employs a composite resin system with epoxy resin, polyester resin, and acrylic resin combined with specific functional additives. This composite formulation provides both rapid photocuring capability and excellent ion migration resistance, resolving the contradiction between productivity and reliability in electronic component coatings.
Solution Approach 2:
The patent controls specific chemical parameters including hydroxyl value (5-100 mgKOH/g) and carboxyl value (5-50 mgKOH/g) to achieve optimal balance between curing speed and ion migration resistance. These parameter optimizations enable the coating to cure quickly while maintaining high reliability against ion migration.
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 excellent adhesiveness to inorganic substrates and significant ion migration resistance, making it suitable for thin-film applications in electronic components without causing short circuits.
Implementation Method 1
a photopolymerization initiator (D) in an amount of 5 to 15 wt % relative to 100 wt % of the composition
Data Source
AI summary
A photocurable composition is capable of forming a cured product having good adhesiveness to an inorganic base material and having good ion migration resistance. The photocurable composition includes a monofunctional acrylic monomer (A) in an amount of 40 to 80 wt % relative to 100 wt % of the composition, a polyfunctional acrylic monomer (B) in an amount of 10 to 50 wt % relative to 100 wt % of the composition, and a hydroxyl value adjusting agent (C) in an amount of 0.1 to 30 wt % relative to 100 wt % of the composition, wherein the hydroxyl value of the composition is 1 to 100 mgKOH/g.