Conductive Paint for Electro-Deposition Shielding
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Solution Overview
Problem
Conventional conductive paints used for electromagnetic shielding are expensive, difficult to manufacture, and lack conductivity between metal parts, making them unsuitable for mass production and effective electromagnetic shielding in applications like communication connectors and adapters.
Innovation Solution
A conductive paint composition featuring non-oxide ceramic particles with an oxide layer, combined with a resin and deionized water, optimized for electro-deposition painting, which includes specific ratios and processing steps to ensure stability and conductivity, such as dispersing and oxidizing the ceramic particles to form suboxides that maintain conductivity while preventing additional oxidation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional conductive paints using highly conductive metal as conductive filler are used, then electrical conductivity is improved, but manufacturing cost increases and ease of manufacture deteriorates
Solution Approach 1:
The patent changes the material parameter from highly conductive metal fillers to non-oxide ceramic particles with oxide layers. This parameter substitution maintains electrical conductivity (800-2300 μS/cm) while significantly reducing manufacturing cost and improving ease of manufacture for mass production processes like electro-deposition and electrostatic painting.
Solution Approach 2:
The patent uses composite non-oxide ceramic particles that have an oxide layer on their surface. This composite structure (non-oxide ceramic core with oxide surface layer) provides both electrical conductivity and chemical stability, resolving the contradiction between conductivity and ease of manufacture.
2Productivity
If electro-deposition painting or electrostatic painting methods are used, then productivity and manufacturing efficiency are improved, but electrical conductivity between metal parts deteriorates because painting layers become insulators
Solution Approach 1:
The patent changes the electrical property parameter of the painting layer by using non-oxide ceramic particles with oxide layers that maintain conductivity. This allows the painting layer to remain conductive while being applied through efficient electro-deposition or electrostatic painting methods, thus maintaining both productivity and electrical conductivity.
3Reliability
If cadmium plating is used for electromagnetic shielding in communication connectors, then electromagnetic shielding performance is improved, but compliance with RoHS regulations deteriorates
Solution Approach 1:
The patent changes the material composition parameter from cadmium-based plating to non-oxide ceramic particles with oxide layers. This substitution maintains electromagnetic shielding performance while ensuring compliance with RoHS regulations, as the non-oxide ceramic particles do not contain harmful substances like cadmium.
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 paint composition provides a physically and chemically stable conductive layer with optimal conductivity (800-2300 μS/cm) for effective electromagnetic shielding, reducing noise and improving the quality of painted connectors and adapters, while being cost-effective and suitable for mass production.
Implementation Method 1
non-oxide ceramic particles each configured such that an oxide layer is provided on a surface thereof
Implementation Method 2
conductive paint for electro-deposition painting
Data Source
AI summary
Disclosed herein is conductive paint for electro-deposition painting. The conductive paint includes non-oxide ceramic particles each configured such that an oxide layer is provided on a surface thereof. In this case, the non-oxide ceramic particles include at least one type of AxBy-form particles, where the sum of x and y is 7 or less.