Resin Composition Drillability Flame Retardance
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Solution Overview
Problem
Existing printed wiring boards face challenges with poor drillability, desmear performance, and ion migration, which affect productivity and electrical insulation properties.
Innovation Solution
A resin composition containing a phosphorus-containing epoxy resin, dicyandiamide as a curing agent, and silica-treated magnesium hydroxide and aluminum hydroxide as inorganic fillers, which improves drillability, desmear performance, and flame retardance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a phosphorus-containing epoxy resin composition is used to achieve flame retardance, then flame retardance is improved, but drillability and desmear performance deteriorate
Solution Approach 1:
The patent modifies the chemical composition parameters of the resin system by introducing a specific inorganic filler composition (silica-treated magnesium hydroxide and aluminum hydroxide in controlled ratios) to alter the physical and chemical properties of the phosphorus-containing epoxy resin, thereby improving drillability while preserving flame retardance
Solution Approach 2:
The patent creates a composite material system combining phosphorus-containing epoxy resin with specific inorganic fillers (silica-treated magnesium hydroxide and aluminum hydroxide) to achieve synergistic effects that simultaneously provide flame retardance and improved drillability
2Object-affected harmful factors
If a phosphorus-containing epoxy resin composition is used to achieve flame retardance, then flame retardance is improved, but desmear performance deteriorates
Solution Approach 1:
The patent adjusts the compositional parameters by incorporating specific inorganic fillers that modify the resin's surface properties and chemical composition, enabling improved desmear performance while maintaining flame retardance
Solution Approach 2:
The patent develops a composite resin system where inorganic fillers work synergistically with phosphorus-containing epoxy resin to achieve both flame retardance and improved desmear performance
3Ease of manufacture
If poor drillability and desmear performance are present, then ion migration occurs more frequently, but improving these properties reduces ion migration
Solution Approach 1:
The patent changes the chemical and physical parameters of the resin composition through the addition of specific inorganic fillers, which simultaneously improves drillability, desmear performance, and reduces ion migration
Solution Approach 2:
The patent creates a composite material system where the synergistic combination of phosphorus-containing epoxy resin and inorganic fillers achieves multiple performance improvements including reduced 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 resin composition enhances drillability, desmear performance, and reduces ion migration, leading to improved productivity and long-term insulation reliability while maintaining flame retardance.
Implementation Method 1
The phosphorus-containing epoxy resin is obtained by producing a reaction between a phosphorus-containing organic compound and a type of epoxy resin
Implementation Method 2
The inorganic filler includes: a silica-treated magnesium hydroxide that is a magnesium hydroxide subjected to surface treatment with silica; and aluminum hydroxide
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
A resin composition contains an epoxy resin, a curing agent, and an inorganic filler. The epoxy resin includes a phosphorus-containing epoxy resin. The curing agent includes dicyandiamide. The inorganic filler includes: a silica-treated magnesium hydroxide that is a magnesium hydroxide subjected to surface treatment with silica; and aluminum hydroxide. Total content of the silica-treated magnesium hydroxide and the aluminum hydroxide falls within a range from 30 parts by mass to 80 parts by mass with respect to 100 parts by mass in total of the epoxy resin and the curing agent.