Polymerizable Composition for High-Density Electrode Transfer Matrix
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Solution Overview
Problem
Existing methods for forming electrodes in high-density mounting technologies face challenges such as complex shape formation, reliance on organic solvents for stripping, and accuracy issues with conductive pillars and connecting materials, particularly in fan-out type WLPs, where there is a need for materials that maintain heat resistance and can be dissolved in aqueous solutions.
Innovation Solution
A polymerizable composition comprising (meth)acryloylmorpholine and specific compounds, which can be cured with ionizing radiation and dissolved in water-containing solutions, is used to create a transfer matrix for forming electrodes, allowing for heat resistance and accurate placement of conductive materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a double laminated film is used to form negative patterns for high-density mounting, then electrode formation is enabled, but the manufacturing steps become complicated and organic solvent-based stripping solutions are required
Solution Approach 1:
The invention extracts the stripping function from organic solvents to water by selecting resin compositions that are soluble in water. This eliminates the need for organic solvent-based stripping solutions while maintaining the ability to remove the transfer matrix after electrode formation, thereby simplifying the manufacturing process and improving environmental compatibility.
Solution Approach 2:
The invention changes the chemical parameters of the resin composition by selecting specific polymers (polyacrylic acid, polyacrylamide, polyvinyl alcohol, carboxymethyl cellulose, or starch) with controlled molecular weights and compositions. These parameter changes enable the transfer matrix to be dissolved in water-containing stripping solutions, replacing organic solvents and simplifying the manufacturing process.
2Reliability
If conventional resin compositions are used in the transfer matrix, then pattern formation is achieved, but heat resistance is insufficient during reflow processing
Solution Approach 1:
The invention uses composite resin compositions consisting of specific polymers (polyacrylic acid, polyacrylamide, polyvinyl alcohol, carboxymethyl cellulose, or starch) with controlled molecular weights and compositions. These composite materials provide both the necessary heat resistance to withstand reflow processing (up to 260°C) and the solubility in water-containing stripping solutions, achieving a balance between thermal stability and removability.
3Object-affected harmful factors
If the transfer matrix material is made soluble in water-containing solutions, then environmental sustainability is improved, but heat resistance may be compromised
Solution Approach 1:
The invention changes the chemical parameters of the resin composition by selecting specific polymers with controlled molecular weights and compositions. These parameter changes enable the transfer matrix to be dissolved in water-containing stripping solutions, replacing organic solvents and simplifying the manufacturing process.
Solution Approach 2:
The invention applies different properties to different aspects of the resin composition: the polymer structure provides heat resistance for withstanding reflow processing, while the functional groups (carboxyl, hydroxyl, ether) provide water solubility for environmentally friendly stripping. This local quality differentiation allows the material to satisfy both requirements simultaneously.
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 enables the formation of electrodes with improved heat resistance and solubility in aqueous solutions, simplifying the manufacturing process and enhancing the accuracy and environmental sustainability of high-density mounting technologies.
Implementation Method 1
a polymerizable composition containing: (A) a first component including a (meth)acryloylmorpholine represented by formula (1), and (B) a second component including a compound represented by formula (2)... an ionizing radiation cured substance obtained by irradiating the above polymerizable composition with an ionizing radiation
Implementation Method 2
In this specification, the term 'ionizing radiation' has a meaning of a generic term for energy sources capable of generating radicals by irradiating or colliding a polymerization initiator with electromagnetic waves such as γ-rays, X-rays, ultraviolet rays, and visible light
Data Source
AI summary
A polymerizable composition curable by ionizing radiation contains (A) a first component including a (meth)acryloylmorpholine represented by formula (1), and (B) a second component including a compound represented by formula (2). The total content of the first component and the second component in the polymerizable composition is 50 wt % or more. The polymerizable composition enables appropriate maintaining of a post-curing shape even after being in a high temperature environment, and enables dissolution thereof by a water-containing solution. In formula (1), R1 is hydrogen or methyl. In formula (2), R2 is hydrogen or a group having 1 to 6 carbons, R3 and R4 are each independently hydrogen or a group having 20 or less carbons, and n is an integer of 1 to 6.