Zeolite Liquid Sealing Agent Viscosity Control
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Solution Overview
Problem
Liquid sealing agents using inorganic fillers like silica do not have a sufficiently low thermal expansion coefficient, and the addition of zeolites to reduce thermal expansion increases viscosity, making it difficult to achieve good injectability and thermal cycle resistance.
Innovation Solution
A liquid composition containing a zeolite with specific particle sizes and a dispersant, combined with an inorganic filler, to reduce viscosity and achieve a low thermal expansion coefficient in the cured resin composite material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If zeolite is added to reduce thermal expansion coefficient, then thermal cycle resistance is improved, but viscosity increases and injectability deteriorates
Solution Approach 1:
The inorganic filler is segmented into two distinct particle size ranges: zeolite (1.0-10 μm) for thermal expansion control and fine inorganic filler (0.1-1.0 μm) for viscosity management. This segmentation allows each component to perform its specific function optimally without interfering with the other.
Solution Approach 2:
Different regions of the filler system have different qualities: larger zeolite particles provide thermal stability while smaller fine filler particles fill interstitial spaces to maintain fluidity. The dispersant is specifically applied to the zeolite surface to modify its interaction with the resin, locally reducing viscosity impact.
2Reliability
If inorganic filler is added to improve moisture resistance and thermal cycle resistance, then reliability is improved, but thermal expansion coefficient is not sufficiently reduced
Solution Approach 1:
The invention uses a composite filler system combining zeolite (providing low thermal expansion coefficient) with additional inorganic filler (providing moisture resistance and thermal cycle resistance). This composite approach allows simultaneous achievement of multiple performance requirements that cannot be met by a single filler type.
3Temperature
If zeolite with lower thermal expansion coefficient is used, then thermal expansion coefficient of cured product is reduced with smaller amount, but viscosity increase is suppressed
Solution Approach 1:
The invention optimizes the particle size parameter of zeolite (1.0-10 μm range) to achieve the right balance between thermal expansion reduction efficiency and viscosity impact. This parameter optimization allows effective thermal management with minimal filler content.
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 lowers the thermal expansion coefficient of the cured product while maintaining good injectability and thermal cycle resistance, making it suitable for various applications including electronic devices.
Implementation Method 1
a dispersant having at least one functional group of an amino group and an amine salt
Implementation Method 2
zeolite having a particle size of 1.0 μm or more and 10 μm or less and an inorganic filler having a particle size of 0.1 μm or more and less than 1.0 μm
Data Source
AI summary
A liquid composition including a resin and an inorganic filler, wherein the inorganic filler comprises a zeolite having a particle size of 1.0 μm or more and 10 μm or less and a small particle size inorganic filler having a particle size of 0.1 μm or more and less than 1.0 μm.